Steel pipe for machine structure STKM 11A 12A12B12C 13A13B13C 14A14B14C 15A15C 16A16C 17A17C 18A18B18C 19A19C 20A-JCG Industrial Co., Ltd. Manufacturi

Carbon steel pipe for STKM machine structure
S-Steel; T-Tube; K-Construction Kozo (Japanese); M-Machine
Carbon steel pipe for mechanical structure: National Standard CNS 4437 JIS G3445 G3103
 

Material composition
Grade	Chemical composition
	C	Si	Mn	P	S
STKM11A	0.12 max	0.35 max	0.60 max	0.040 max	0.040 max
STKM12A	0.20 max	0.35 max	0.60 max	0.040 max	0.040 max
STKM12B
STKM12C
STKM13A	0.25 max	0.35 max	0.30~ 0.90	0.040 max	0.040 max
STKM13B
STKM13C
STKM14A	0.30 max	0.35 max	0.30~ 1.00	0.040 max	0.040 max
STKM14B
STKM14C
STKM15A	0.25~ 0.35	0.35 max	0.30~ 1.00	0.040 max	0.040 max
STKM15C
STKM16A	0.35~ 0.45	0.40 max	0.40~ 1.00	0.040 max	0.040 max
STKM16C
STKM17A	0.45~ 0.55	0.40 max	0.40~ 1.00	0.040 max	0.040 max
STKM17C
STKM18A	0.18 max	0.55 max	1.50 max	0.040 max	0.040 max
STKM18B
STKM18C
STKM19A	0.25 max	0.55 max	1.50 max	0.040 max	0.040 max
STKM19C
STKM20A +Nb 或 V 0.15max	0.25 max	0.55 max	1.60 max	0.040 max	0.040 max

 

Mechanical properties
Grade	Stretching test			Bend	P
	Tensile T.S N/mm	Yield Y.P. N/mm	EF
STKM11A	290min	--	30 min	180°	1/2 D
STKM12A	340min	175min	30 min	90°	2/3 D
STKM12B	390min	275min	20 min	90°	2/3 D
STKM12C	470min	355min	15 min	-	-
STKM13A	370min	215min	25 min	90°	2/3 D
STKM13B	440min	305min	15 min	90°	3/4 D
STKM13C	510min	380min	10 min	-	-
STKM14A	410min	245min	20 min	90°	3/4 D
STKM14B	500min	355min	10 min	90°	7/8 D
STKM14C	550min	410min	10 min	-	-
STKM15A	470min	275min	17 min	90°	3/4 D
STKM15C	580min	430min	7 min	-	-
STKM16A	510min	325min	15 min	90°	7/8 D
STKM16C	620min	460min	7 min	-	-
STKM17A	550min	345min	15 min	90°	7/8 D
STKM17C	650min	480min	5 min	-	-
STKM18A	440min	275min	20 min	90°	7/8 D
STKM18B	490min	315min	18 min	90°	7/8 D
STKM18C	510min	380min	10 min	-	-
STKM19A	490min	315min	18 min	90°	7/8 D
STKM19C	550min	410min	10 min	-	-
STKM20A	540min	390min	18 min	90°	7/8 D

      
STKM11A ~ 18C / DIN ST52 / ASTM A106, the precision and surface roughness of cold drawn precision steel pipes with inner and outer diameters are better than those of hot rolled pipes.
In order to achieve a higher degree of tensile strength, yield strength, elongation and other requirements; cold drawn precision steel pipes for inner and outer diameters can be used for
Pneumatic cylinders; hydraulic cylinders; shock absorbers for motorcycles and bicycles; condensers for air-conditioners; front forks and rear forks of motorcycles;
Robotic arm; film recycling granulator; exhaust pipe; bottle blowing machine; leveling machine; jack; tiller; roller for printing machinery, etc.

Carbon steel pipe STKM for mechanical structure application range:
￭ Air cylinder
￭ Hydraulic cylinder
￭ Construction machinery
￭ Agricultural machinery
￭ Boiler tube
￭ Mechanical engineering:
punch
Plastic injection machine
Blow molding machine
Food Machinery
Stacker
￭ Transportation:
Automobile, motorcycle, bicycle shock absorber
Truck lift
Excavator
crane
￭ Sports equipment
￭ Medical equipment
￭ Ship machinery
￭ Air pressure bar for office chair
￭ Jack