Knowledge
2021-05-18 87182
Steel plate(SPHC SPCC SECC SGCC SGLC Tinplate)- JCG Industrial Co., Ltd. Manufacturing Factory
Steel plate
Description of commonly used materials for sheet metal:
SPHC: Hot rolled steel sheet.
SPCC: Cold rolled steel sheet.
SECC: Galvanized steel sheet.
SGCC: Cold rolled hot dip galvanized steel sheet.
SGLC: 55% aluminum-zinc-plated steel coil.
Tinplate.
Hot-rolled steel plate series: heated by the steel billet, rolled by a roughing mill and a finishing mill, into a fixed-width steel (iron) plate, cooled by water, and coiled into a steel plate with a fixed width but a long length. Coil, this steel coil is hot rolled steel coil (SPHC), because it is cooled by adding water, the reactant will be formed on the surface of the steel plate and the appearance will be black, so it is commonly called "black leather"; hot rolled steel coil is the base material of most existing stamping materials, It is rarely directly used as a stamping material, and is mainly used as a raw material for cold-rolled steel coils.
Hot rolled steel sheets can generally be divided into SPHC, SPHD, and SPHE.
The meaning of the symbol of hot-rolled steel plate:
S: Steel
P: Plate
H: Hot Rolled (HotRolled)
C: Common
D: Drawing
E: Elongation
SPHC_P pickling plate: the hot-rolled steel coil is subjected to the action of acid to wash off the surface of the steel plate and the steel plate forming the reactant is coiled into a pickled steel plate (commonly known as the pickling plate SPHC_P). In contrast, hot-rolled pickled plates remove the surface oxide scale and improve the surface quality of steel. Pickled plates are mostly used for "internal components" in the use of stamping materials. The product does not require appearance and does not require special treatment.
To Scope of application of hot-rolled steel sheet: hot-rolled steel sheet has black reactants on the surface. During stamping and forming, this black reaction product will peel off and damage the mold. Therefore, hot-rolled steel sheets need to undergo pickling, rolling, electroplating and other processes to become normal Stamping materials are widely used (e.g. SPCC, SECC, etc.), and hot-rolled steel sheets are generally rarely used directly for stamping purposes.
Types of cold-rolled steel sheets: There are three types of cold-rolled steel sheets for stamping.
1. Rimmed steel (rimmed steel): abbreviated as SPCC; it is the representative steel grade of cold-rolled steel plate.
2. Low-carbon boiling steel for drawing: SPCD for short; compared with SPCC, its Erichsen value (Note 1) is larger and the yield strength is lower, so the stretchability and stretch flangeability are better.
3. Low-carbon rimmed steel for deep drawing: SPCE for short; compared with SPCC, it has a great improvement in stretch flangeability and deep drawability. However, rimmed steel has time-effectiveness characteristics (Note 2), and attention must be paid when using .
The meaning of cold-rolled steel plate symbol:
S: Steel
P: Plate
C: Cold Rolled (ColdRolled)
C: Common
D: Drawing
E: Elongation
※Note 1 Erichsen test: The formability evaluation test method of metal materials has a long history. At present, the most widely used tensile test method in the world is called the Erichsen test. JIS Z2247 stipulates the Erichsen test method.
※Note 2 Cold-rolled steel sheet aging characteristics: It has a clear yield plateau on the tensile curve of annealed or aging low-carbon steel. This will appear as a slip line that damages the appearance during stamping and forming. When the deformation exceeds the yielding platform, the slip line disappears and the board surface becomes a little rough. Therefore, after cold rolling and annealing, low-carbon steel sheets for stamping must undergo quenching and tempering rolling so that their deformation exceeds the yield platform to prevent slip lines during stamping.
To
Cold rolled steel plate (SPCC) Scope of application: more commonly used for internal components, the product does not require appearance, and does not require attachments such as strength.
The symbol of galvanized steel sheet means:
S: Steel (steel)
E: Electroplating (plating)
C: Cold rolled (cold rolled)
C: Normal level (ordinary)
D: Extension level (drawing)
E: Deep extension level (elongation)
Scope of application of galvanized steel sheet: Galvanized steel sheet is widely used in computer shells, automobiles, hardware, and optoelectronic products.
SECC (galvanized steel sheet) defect: Recently, it is widely used in communication and PC products to replace SPCC. The only drawback is that the cut surface and creases are easy to damage.
Cold-rolled hot-dip galvanized steel sheet series: Continuous hot-dip galvanized steel sheet is referred to as hot-dip galvanized steel sheet. It is a cold-rolled continuous hot-dip galvanized steel sheet and steel strip with a thickness of 0.25mm~2.5mm. The steel strip is first passed through the flame. The preheating furnace burns off the residual oil on the surface to form an iron oxide film on the surface, and then enters the reduction inversion furnace containing the mixed gas of H2 and N2 and heats it to 710°~920° to reduce the iron oxide film to sponge iron. After the activated and purified strip is cooled to a temperature slightly higher than the molten zinc temperature, it enters the zinc pot at 450°~460°, uses an air knife to control the surface thickness of the zinc layer, and is finally passivated by a salt solution to improve whitening resistance Rustiness, the surface of the steel plate is beautiful, there are block or leaf-like patterns, and the coating is firm, with excellent atmospheric corrosion resistance. At the same time, the steel plate also has good welding function and cold forming performance, and the surface thickness of electro-galvanized sheet The zinc coating is thicker and is mainly used for corrosion-resistant sheet metal parts.
Symbols of cold-rolled hot-dip galvanized steel sheet mean:
S: Steel (steel)
G: Electro-galvanized (galvanized)
C: Cold rolled (cold rolled)
C: Normal level (ordinary)
D: Extension level (drawing)
Scope of application of cold-rolled hot-dip galvanized steel sheet: Mainly used for sheet metal parts that require high temperature resistance and applicable. The product does not require appearance, strength and other accessories. Workpieces that require deep drawing should not be replaced with hot-dip galvanized sheets.
SGLC: 55% aluminum-zinc-plated steel coil (JIS G3321)
The aluminum-zinc alloy structure of "55% aluminum-zinc steel coil" is composed of 55% aluminum, 43.4% zinc and 1.6% silicon solidified at a high temperature of 600ºC. The entire structure is composed of aluminum-iron-silicon-zinc, forming a compact Quaternary crystal, this crystal forms a barrier on the steel plate, so it can effectively prevent corrosion factors from penetrating. Corrosion resistance comes from the "aluminum barrier layer protection" function and the "zinc sacrificial protection" function.
S: Steel (steel)
GL: electroplated aluminum zinc (galvanized)
C: Normal level (normal)
Tinplate
Tinned iron is also called "Tinplate".
Tinplate is the common name of electroplated tin sheet steel, the English abbreviation is SPTE, which refers to cold-rolled low-carbon thin steel sheet or steel strip coated with commercial pure tin on both sides, also called tin-plated iron. Tin mainly plays a role in preventing corrosion and corrosion. The strength and formability of steel and the corrosion resistance of tin, the appearance of solderability and appearance are combined in one material, which has the characteristics of corrosion resistance, non-toxicity, high strength and good ductility.
Yield strength: 205 N / mm ^ 2
Tensile strength: 270 N / mm ^ 2
Elongation: 20-25% (thickness 0.25 -2.3mm)
Heat reflectivity: 70-75% (good heat-resistant shielding material)
Heat resistance: 300-350 degrees (high temperature oxidation resistance is better than SECC)
Cold rolled products are selected as follows：
(1) Automobile and motorcycle parts: can be divided into A. External board: The surface quality is clean, and the rigidity is good (the yield strength should not be too low). SPCC-SD CQ2 GP steel material is applicable. B. Internal plate: good formability, high r value, n value, low yield strength. SPCEN-SD or EDDQ, SPCC-CQ2 UE steel material is applicable. C. Reinforcing plate: requires high strength and good formability (requires r value n value and tensile strength). Such as CSC CF 370R or 390R steel material is suitable. (2) Home appliances: The flatness and cleanliness of the steel material is required, and the shape is good. SPCC-SD CQ2 UE or G.P steel material is applicable.
(3) Electronic information (computer case): The flatness and cleanliness of steel materials, rigidity, and electroplating are required. SPCC-SD CQ2 UE or SPCC-SD CQ1 UE steel material is applicable.
(4) Drums and pipes: lower quality requirements. Drums require thickness accuracy, surface oiling characteristics, and weldability. SPCC-SD CQ1 or CQ2 steel materials are suitable.
(5) Hand tools, tables and chairs: good flatness and paintability are required. SPCC-SD CQ1 or CQ2 Code 35 steel material is applicable.
(6) Other uses such as umbrella ribs: requiring strength and electroplating. SPCC-SD CQ1 Code 20 or Code 25 steel material is applicable.
Hot-rolled steel products are widely used, considering mechanical properties, product categories, and product materials :
Mechanical considerations
(1) Mechanical properties and processing properties, for stamping purposes or high formability processing steel materials, the yield strength is relatively low, SPHD, SPHE or SAE1006, steel with better formability not only has low yield strength, but also has a smaller YS/TS ratio. For example, SPHC with the same thickness, YS/TS=0.65 steel, formability is better than YS/TS=0.8 steel.
(2) Structural steel materials, SM490 (SM50), SS400 (SS41), A572, must have specific tensile strength to prevent the workpiece from breaking, and also have a considerable yield strength to prevent deformation of the workpiece. The tensile strength has the minimum required value range, and the YS ratio of structural steel is not as low as possible. This is different from the steel for forming.
Product Category
1. Hot-rolled crude steel coil (HR Band) and hot-rolled steel coil (HR Coil)-pay attention to surface quality, continuous stamping processing, hot-rolled steel coils should be used, hot-rolled crude steel coils should not be used. ...
2. Hot-rolled steel coil (HR Coii) and hot-rolled sea bream sheet (HR Sheet)-pay attention to stricter flatness requirements. Such as elevator panels and electrical box panels, hot rolled steel sheets (HR Sheet) should be used to improve the quality.
3. Hot-rolled steel plate (HR plate) and steel plate (Plate)-hot-rolled steel plate (HR plate) crude steel coil, slitting and flattening into steel plate (Plate) steel plate. The surface roughness is small, suitable for the processing of parts requiring a smooth surface.
Product material
1. General quality-simple forming, bending or welding applicable appearance is a secondary requirement.
Uses: gears, electrical boxes, jack shells.
Specifications: JIS G3131 SPHC; AISI 1008-1023 CQ; ASTM A569 A635.
2. Stamping quality-hot-rolled black skin will damage the stamping die or damage the surface of the finished product. Only with pickling and oiled steel can it be beneficial to processability.
Uses: Bicycle handles, rims, and roulettes.
Specifications: JlSG3131SPHD; Al5I1006-1008DQ; ASTMA621.
3. Deep drawing quality-suitable for special stamping, stretch forming parts.
Uses: automotive buffers, compressor seats, oil filter boxes.
Specifications: JlS G3131 SPHE; AIS1 1006-1008 DDQ; ASTM 622.
4. Structural quality-In addition to bending tests, structural steel still has mechanical performance requirements for tensile strength, elongation, and hardness.
Uses: buildings, bridges, hulls, oil tanks.
Specifications: JISG3101SSXXX.G3106S SMXXX; ASTM A57, A607; DlN17100.
5. Quality for automobile structure-In addition to strength, good workability is required, surface quality is emphasized, and dimensional tolerances are strict.
Uses: automobile beam frame, automobile wheel rim, automobile chassis parts.
Specification: JlS G3131 SAPHXXX; SAE J410.
6. Weather-resistant structural quality-in addition to strength, atmospheric corrosion resistance is required. Copper, chromium, and phosphorus are usually added to form a dense oxide film on the surface to prevent further oxidation and corrosion, which can save paint and maintenance costs, and Extend the service life of the structure.
Uses: Containers, railway vehicles, buildings, bridges.
Specifications: CSC ACR-TEN A, ACR-TEN AF; JIS G3125 SPA-H.G3114 SMAXXX; ASTM A606.
7. Quality for mechanical structure-except for strength requirements. Wear resistance is still required, and it is mostly used for the manufacture of machinery or tools. Due to the high rigidity and wear resistance requirements, generally high-carbon steel or low-alloy steel with elements such as chromium and molybdenum added.
Purpose: chain, binding device. Gardening tools.
Specification: JIS G4051 SXXC; AIS (SAE) 4130.
8. Quality for pressure vessels-In addition to strength, weldability and processability, special emphasis is placed on the uniformity of material and thickness. Every part of the material must meet various mechanical trade regulations. Because of the safety under high pressure. Therefore, its internal quality and inspection quality control operations are also particularly strict.
Uses: pressure vessels, gas cylinders.
Specification: JIS G3116 SGXXX.
9. Pipeline steel-for transporting petroleum, gas or liquid, the hot-rolled steel strip is trimmed or cut, then formed and welded into a pipe for use. Its quality requires high strength, low temperature characteristics and good weldability, and appropriate Processability, so internal quality and intervening substances are the focus of quality control.
Purpose: Petroleum pipeline.
Specification: API 5L; JIS G3132 SPHT.
10. Quality for re-rolling-further cold-rolling to produce cold-rolled steel coils (sheets). Generally, according to the characteristics of customers' cold-rolled products and the special needs of customers, product quality design and control are set to meet the needs of cold-rolled processing.
Uses: cold rolling.
Specifications: AISI (SAE) 1008RRQ, 1006RRQ, 1035RRQ.
Description of commonly used materials for sheet metal:
SPHC: Hot rolled steel sheet.
SPCC: Cold rolled steel sheet.
SECC: Galvanized steel sheet.
SGCC: Cold rolled hot dip galvanized steel sheet.
SGLC: 55% aluminum-zinc-plated steel coil.
Tinplate.
Hot-rolled steel plate series: heated by the steel billet, rolled by a roughing mill and a finishing mill, into a fixed-width steel (iron) plate, cooled by water, and coiled into a steel plate with a fixed width but a long length. Coil, this steel coil is hot rolled steel coil (SPHC), because it is cooled by adding water, the reactant will be formed on the surface of the steel plate and the appearance will be black, so it is commonly called "black leather"; hot rolled steel coil is the base material of most existing stamping materials, It is rarely directly used as a stamping material, and is mainly used as a raw material for cold-rolled steel coils.
Hot rolled steel sheets can generally be divided into SPHC, SPHD, and SPHE.
The meaning of the symbol of hot-rolled steel plate:
S: Steel
P: Plate
H: Hot Rolled (HotRolled)
C: Common
D: Drawing
E: Elongation
SPHC_P pickling plate: the hot-rolled steel coil is subjected to the action of acid to wash off the surface of the steel plate and the steel plate forming the reactant is coiled into a pickled steel plate (commonly known as the pickling plate SPHC_P). In contrast, hot-rolled pickled plates remove the surface oxide scale and improve the surface quality of steel. Pickled plates are mostly used for "internal components" in the use of stamping materials. The product does not require appearance and does not require special treatment.
To Scope of application of hot-rolled steel sheet: hot-rolled steel sheet has black reactants on the surface. During stamping and forming, this black reaction product will peel off and damage the mold. Therefore, hot-rolled steel sheets need to undergo pickling, rolling, electroplating and other processes to become normal Stamping materials are widely used (e.g. SPCC, SECC, etc.), and hot-rolled steel sheets are generally rarely used directly for stamping purposes.
Types of cold-rolled steel sheets: There are three types of cold-rolled steel sheets for stamping.
1. Rimmed steel (rimmed steel): abbreviated as SPCC; it is the representative steel grade of cold-rolled steel plate.
2. Low-carbon boiling steel for drawing: SPCD for short; compared with SPCC, its Erichsen value (Note 1) is larger and the yield strength is lower, so the stretchability and stretch flangeability are better.
3. Low-carbon rimmed steel for deep drawing: SPCE for short; compared with SPCC, it has a great improvement in stretch flangeability and deep drawability. However, rimmed steel has time-effectiveness characteristics (Note 2), and attention must be paid when using .
The meaning of cold-rolled steel plate symbol:
S: Steel
P: Plate
C: Cold Rolled (ColdRolled)
C: Common
D: Drawing
E: Elongation
※Note 1 Erichsen test: The formability evaluation test method of metal materials has a long history. At present, the most widely used tensile test method in the world is called the Erichsen test. JIS Z2247 stipulates the Erichsen test method.
※Note 2 Cold-rolled steel sheet aging characteristics: It has a clear yield plateau on the tensile curve of annealed or aging low-carbon steel. This will appear as a slip line that damages the appearance during stamping and forming. When the deformation exceeds the yielding platform, the slip line disappears and the board surface becomes a little rough. Therefore, after cold rolling and annealing, low-carbon steel sheets for stamping must undergo quenching and tempering rolling so that their deformation exceeds the yield platform to prevent slip lines during stamping.
To
Cold rolled steel plate (SPCC) Scope of application: more commonly used for internal components, the product does not require appearance, and does not require attachments such as strength.
The symbol of galvanized steel sheet means:
S: Steel (steel)
E: Electroplating (plating)
C: Cold rolled (cold rolled)
C: Normal level (ordinary)
D: Extension level (drawing)
E: Deep extension level (elongation)
Scope of application of galvanized steel sheet: Galvanized steel sheet is widely used in computer shells, automobiles, hardware, and optoelectronic products.
SECC (galvanized steel sheet) defect: Recently, it is widely used in communication and PC products to replace SPCC. The only drawback is that the cut surface and creases are easy to damage.
Cold-rolled hot-dip galvanized steel sheet series: Continuous hot-dip galvanized steel sheet is referred to as hot-dip galvanized steel sheet. It is a cold-rolled continuous hot-dip galvanized steel sheet and steel strip with a thickness of 0.25mm~2.5mm. The steel strip is first passed through the flame. The preheating furnace burns off the residual oil on the surface to form an iron oxide film on the surface, and then enters the reduction inversion furnace containing the mixed gas of H2 and N2 and heats it to 710°~920° to reduce the iron oxide film to sponge iron. After the activated and purified strip is cooled to a temperature slightly higher than the molten zinc temperature, it enters the zinc pot at 450°~460°, uses an air knife to control the surface thickness of the zinc layer, and is finally passivated by a salt solution to improve whitening resistance Rustiness, the surface of the steel plate is beautiful, there are block or leaf-like patterns, and the coating is firm, with excellent atmospheric corrosion resistance. At the same time, the steel plate also has good welding function and cold forming performance, and the surface thickness of electro-galvanized sheet The zinc coating is thicker and is mainly used for corrosion-resistant sheet metal parts.
Symbols of cold-rolled hot-dip galvanized steel sheet mean:
S: Steel (steel)
G: Electro-galvanized (galvanized)
C: Cold rolled (cold rolled)
C: Normal level (ordinary)
D: Extension level (drawing)
Scope of application of cold-rolled hot-dip galvanized steel sheet: Mainly used for sheet metal parts that require high temperature resistance and applicable. The product does not require appearance, strength and other accessories. Workpieces that require deep drawing should not be replaced with hot-dip galvanized sheets.
SGLC: 55% aluminum-zinc-plated steel coil (JIS G3321)
The aluminum-zinc alloy structure of "55% aluminum-zinc steel coil" is composed of 55% aluminum, 43.4% zinc and 1.6% silicon solidified at a high temperature of 600ºC. The entire structure is composed of aluminum-iron-silicon-zinc, forming a compact Quaternary crystal, this crystal forms a barrier on the steel plate, so it can effectively prevent corrosion factors from penetrating. Corrosion resistance comes from the "aluminum barrier layer protection" function and the "zinc sacrificial protection" function.
S: Steel (steel)
GL: electroplated aluminum zinc (galvanized)
C: Normal level (normal)
Tinplate
Tinned iron is also called "Tinplate".
Tinplate is the common name of electroplated tin sheet steel, the English abbreviation is SPTE, which refers to cold-rolled low-carbon thin steel sheet or steel strip coated with commercial pure tin on both sides, also called tin-plated iron. Tin mainly plays a role in preventing corrosion and corrosion. The strength and formability of steel and the corrosion resistance of tin, the appearance of solderability and appearance are combined in one material, which has the characteristics of corrosion resistance, non-toxicity, high strength and good ductility.
Yield strength: 205 N / mm ^ 2
Tensile strength: 270 N / mm ^ 2
Elongation: 20-25% (thickness 0.25 -2.3mm)
Heat reflectivity: 70-75% (good heat-resistant shielding material)
Heat resistance: 300-350 degrees (high temperature oxidation resistance is better than SECC)
Cold rolled products are selected as follows：
(1) Automobile and motorcycle parts: can be divided into A. External board: The surface quality is clean, and the rigidity is good (the yield strength should not be too low). SPCC-SD CQ2 GP steel material is applicable. B. Internal plate: good formability, high r value, n value, low yield strength. SPCEN-SD or EDDQ, SPCC-CQ2 UE steel material is applicable. C. Reinforcing plate: requires high strength and good formability (requires r value n value and tensile strength). Such as CSC CF 370R or 390R steel material is suitable. (2) Home appliances: The flatness and cleanliness of the steel material is required, and the shape is good. SPCC-SD CQ2 UE or G.P steel material is applicable.
(3) Electronic information (computer case): The flatness and cleanliness of steel materials, rigidity, and electroplating are required. SPCC-SD CQ2 UE or SPCC-SD CQ1 UE steel material is applicable.
(4) Drums and pipes: lower quality requirements. Drums require thickness accuracy, surface oiling characteristics, and weldability. SPCC-SD CQ1 or CQ2 steel materials are suitable.
(5) Hand tools, tables and chairs: good flatness and paintability are required. SPCC-SD CQ1 or CQ2 Code 35 steel material is applicable.
(6) Other uses such as umbrella ribs: requiring strength and electroplating. SPCC-SD CQ1 Code 20 or Code 25 steel material is applicable.
Hot-rolled steel products are widely used, considering mechanical properties, product categories, and product materials :
Mechanical considerations
(1) Mechanical properties and processing properties, for stamping purposes or high formability processing steel materials, the yield strength is relatively low, SPHD, SPHE or SAE1006, steel with better formability not only has low yield strength, but also has a smaller YS/TS ratio. For example, SPHC with the same thickness, YS/TS=0.65 steel, formability is better than YS/TS=0.8 steel.
(2) Structural steel materials, SM490 (SM50), SS400 (SS41), A572, must have specific tensile strength to prevent the workpiece from breaking, and also have a considerable yield strength to prevent deformation of the workpiece. The tensile strength has the minimum required value range, and the YS ratio of structural steel is not as low as possible. This is different from the steel for forming.
Product Category
1. Hot-rolled crude steel coil (HR Band) and hot-rolled steel coil (HR Coil)-pay attention to surface quality, continuous stamping processing, hot-rolled steel coils should be used, hot-rolled crude steel coils should not be used. ...
2. Hot-rolled steel coil (HR Coii) and hot-rolled sea bream sheet (HR Sheet)-pay attention to stricter flatness requirements. Such as elevator panels and electrical box panels, hot rolled steel sheets (HR Sheet) should be used to improve the quality.
3. Hot-rolled steel plate (HR plate) and steel plate (Plate)-hot-rolled steel plate (HR plate) crude steel coil, slitting and flattening into steel plate (Plate) steel plate. The surface roughness is small, suitable for the processing of parts requiring a smooth surface.
Product material
1. General quality-simple forming, bending or welding applicable appearance is a secondary requirement.
Uses: gears, electrical boxes, jack shells.
Specifications: JIS G3131 SPHC; AISI 1008-1023 CQ; ASTM A569 A635.
2. Stamping quality-hot-rolled black skin will damage the stamping die or damage the surface of the finished product. Only with pickling and oiled steel can it be beneficial to processability.
Uses: Bicycle handles, rims, and roulettes.
Specifications: JlSG3131SPHD; Al5I1006-1008DQ; ASTMA621.
3. Deep drawing quality-suitable for special stamping, stretch forming parts.
Uses: automotive buffers, compressor seats, oil filter boxes.
Specifications: JlS G3131 SPHE; AIS1 1006-1008 DDQ; ASTM 622.
4. Structural quality-In addition to bending tests, structural steel still has mechanical performance requirements for tensile strength, elongation, and hardness.
Uses: buildings, bridges, hulls, oil tanks.
Specifications: JISG3101SSXXX.G3106S SMXXX; ASTM A57, A607; DlN17100.
5. Quality for automobile structure-In addition to strength, good workability is required, surface quality is emphasized, and dimensional tolerances are strict.
Uses: automobile beam frame, automobile wheel rim, automobile chassis parts.
Specification: JlS G3131 SAPHXXX; SAE J410.
6. Weather-resistant structural quality-in addition to strength, atmospheric corrosion resistance is required. Copper, chromium, and phosphorus are usually added to form a dense oxide film on the surface to prevent further oxidation and corrosion, which can save paint and maintenance costs, and Extend the service life of the structure.
Uses: Containers, railway vehicles, buildings, bridges.
Specifications: CSC ACR-TEN A, ACR-TEN AF; JIS G3125 SPA-H.G3114 SMAXXX; ASTM A606.
7. Quality for mechanical structure-except for strength requirements. Wear resistance is still required, and it is mostly used for the manufacture of machinery or tools. Due to the high rigidity and wear resistance requirements, generally high-carbon steel or low-alloy steel with elements such as chromium and molybdenum added.
Purpose: chain, binding device. Gardening tools.
Specification: JIS G4051 SXXC; AIS (SAE) 4130.
8. Quality for pressure vessels-In addition to strength, weldability and processability, special emphasis is placed on the uniformity of material and thickness. Every part of the material must meet various mechanical trade regulations. Because of the safety under high pressure. Therefore, its internal quality and inspection quality control operations are also particularly strict.
Uses: pressure vessels, gas cylinders.
Specification: JIS G3116 SGXXX.
9. Pipeline steel-for transporting petroleum, gas or liquid, the hot-rolled steel strip is trimmed or cut, then formed and welded into a pipe for use. Its quality requires high strength, low temperature characteristics and good weldability, and appropriate Processability, so internal quality and intervening substances are the focus of quality control.
Purpose: Petroleum pipeline.
Specification: API 5L; JIS G3132 SPHT.
10. Quality for re-rolling-further cold-rolling to produce cold-rolled steel coils (sheets). Generally, according to the characteristics of customers' cold-rolled products and the special needs of customers, product quality design and control are set to meet the needs of cold-rolled processing.
Uses: cold rolling.
Specifications: AISI (SAE) 1008RRQ, 1006RRQ, 1035RRQ.