JIS G3445 Carbon Steel Tubes For Machine Structural Purposes

Price Negotiable

Price: negotiable

MOQ: 3 tons

Delivery Time: 30-35 days

Brand: TORICH

Product Description

JIS G3445 Carbon steel tubes for machine structural purposes

Type: Seamless and welded carbon steel pipes

Application: For machinery, automobiles, bicycles, furniture, appliances

Technique: Cold-finished, hot-finished, ERW

Product Description

Chemical composition:

Grade		Designation	Unit %
			C	Si	Mn	P	S	Nb or V
Grade 11	A	STKM 11A	0.12 max.	0.35 max.	0.60 max.	0.040 max.	0.040 max.	–
Grade 12	A	STKM 12A	0.20 max.	0.35 max.	0.60 max.	0.040 max.	0.040 max.	–
	B	STKM 12B
	C	STKM 12C
Grade 13	A	STKM 13A	0.25 max.	0.35 max.	0.30~0.90	0.040 max.	0.040 max.	–
	B	STKM 13B
	C	STKM 13C
Grade 14	A	STKM 14A	0.30 max.	0.35 max.	0.30~1.00	0.040 max.	0.040 max.	–
	B	STKM 14B
	C	STKM 14C
Grade 15	A	STKM 15A	0.25~0.35	0.35 max.	0.30~1.00	0.040 max.	0.040 max.	–
	C	STKM 15C
Grade 16	A	STKM 16A	0.35~0.45	0.40 max.	0.40~1.00	0.040 max.	0.040 max.	–
	C	STKM 16C
Grade 17	A	STKM 17A	0.45~0.55	0.40 max.	0.40~1.00	0.040 max.	0.040 max.	–
	C	STKM 17C
Grade 18	A	STKM 18A	0.18 max.	0.55 max.	1.50 max.	0.040 max.	0.040 max.	–
	B	STKM 18B
	C	STKM 18C
Grade 19	A	STKM 19A	0.25 max.	0.55 max.	1.50 max.	0.040 max.	0.040 max.	–
	C	STKM 19C
Grade 20	A	STKM 20A	0.25 max.	0.55 max.	1.60 max.	0.040 max.	0.040 max.	0.15 max.

Mechanical proporties:

Designation	Tensile Strength MPa{ksi}	Yield point or proof MPa{ksi}	Elongation %		Flattening strength Distance between flat plates (H) (D is outside dia. of the tube)	Bending strength
			No. 4,	No. 4,		Bend angle	Inside radius
			No. 11	No. 5			(D is outside dia. of the tube)
			No. 12	test pieces Transverse direction
			test pieces Longitudinal direction
STKM11A	290{30} min.	–	35 min.	30 min.	1/2 D	180	4 D
STKM12A	340{35} min.	175{18} min.	35 min.	30 min.	2/3 D	90	6 D
STKM12B	390{40} min.	275{28} min.	25 min.	20 min.	2/3 D	90	6 D
STKM12C	470{48} min.	355{36} min.	20 min.	15 min.	–	–	–
STKM13A	370{38} min.	215{22} min.	30 min.	25 min.	2/3 D	90	6 D
STKM13B	440{45} min.	305{31} min.	20 min.	15 min.	3/4 D	90	6 D
STKM13C	510{52} min.	380{39} min.	15 min.	10 min.	–	–	–
STKM14A	410{42} min.	245{25} min.	25 min.	20 min.	3/4 D	90	6 D
STKM14B	500{51} min.	355{36} min.	15 min.	10 min.	7/8 D	90	8 D
STKM14C	550{56} min.	410{42} min.	15 min.	10 min.	–	–	–
STKM15A	470{48} min.	275{28} min.	22 min.	17 min.	3/4 D	90	6 D
STKM15C	580{59} min.	430{44} min.	12 min.	7 min.	–	–	–
STKM16A	510{52} min.	325{33} min.	20 min.	15 min.	7/8 D	90	8 D
STKM16C	620{63} min.	460{47} min.	12 min.	7 min.	–	–	–
STKM17A	550{56} min.	345{35} min.	20 min.	15 min.	7/8 D	90	8 D
STKM17C	650{66} min.	480{49} min.	10 min.	5 min.	–	–	–
STKM18A	440{45} min.	275{28} min.	25 min.	20 min.	7/8 D	90	6 D
STKM18B	490{50} min.	315{32}min.	23 min.	18 min.	7/8 D	90	8 D
STKM18C	510{52} min.	380{39} min.	15 min.	10 min.	–	–	–
STKM19A	490{50} min.	315{32} min.	23 min.	18 min.	7/8 D	90	6 D
STKM19C	550{56} min.	410{42} min.	15 min.	10 min.	–	–	–
STKM20A	540{55} min.	390{40} min.	23 min.	18 min.	7/8 D	90	6 D

Appearance:

The tubes shall be practically straight. and the two ends shall be at right angles to the axis of the tube
The tubes shall be free from defects detrimental to practical use.
The surface finish of the tubes, when especially specified shall be agreed upon by the purchaser and the manufacturer.

Product show:

FAQ

Q: Are you trading company or manufacturer?

A: We are a professional steel pipes materials manufacturer.

Q: How long is your delivery time?

A: Generally it takes 7-14 days if the goods are in stock or 30-60 days if there is no stock, this mainly depends on quantity.

Q: Do you provide free samples?

A: Yes, we could offer the sample for free charge but need pay the cost of freight.

Q: What is your terms of payment?

A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact us.