Product Description

JIS G3445 steel pipe used for machinery, automobiles, bicycles, furniture, appliances and other machine parts.

JIS G3445 standard specifies the carbon steel tubes, hereinafter referred to as the thes, used for machinery, automobiles, bicycles, furniture, appliances and other machine parts.
Carbon steel tubes for machine structural purposes .
Standards: JIS G3445

Size (mm):

Outer Dimensions: 19.05mm – 114.3mm
Wall Thickness:2.0mm – 14 mm
Length: max 16000mm

Application: Tubes used for machinery, automobiles, bicycles, furniture, appliances and other machine parts.
The main products of steel / steel grade: STKM11A, STKM12(A,B,C), STKM13(A,B,C), STKM14(A,B,C).
Packing: Bare/bundles/crates/crate protection at the both sides of tubes or as per customers’ requirements .
Painting: as requested.

Chemical composition(mass fraction)(wt.%) of the STKM12B

C(%)	Si(%)	Mn(%)	P(%)	S(%)
Max 0.20	0.35	Max 0.60	0.04	0.04

Mechanical properties of grade STKM12B

Yield Rp0.2(MPa)	Tensile Rm(MPa)	Impact KV (J)	Elongation A (%)	Reduction in cross section on fracture Z (%)	As-Heat-Treated Condition	HBW
947 (≥)	758 (≥)	34	44	43	Solution and Aging, Annealing, Ausaging, Q+T,etc	442

Physical properties of grade STKM12B

Property	Density kg/dm3	Temperature T °C/F	Specific heat J / kgK	Thermal conductivity W/mK	Electric resistance µΩ·cm
833 (≥)	286 (≥)	13	11	44	Solution and Aging, Annealing, Ausaging, Q+T,etc
Temp. °C/°F	Creep strain limit (10000h) (Rp1,0) N/mm2	Creep rupture strength (10000h) (Rp1,0) N/mm2	-	-	-
747	212	738	-	-	-

STKM12B Range of products

Product type	Products	Dimension	Processes	Deliver Status
Plates / Sheets	Plates / Sheets	0.08-200mm(T)WL	Forging, hot rolling and cold rolling	Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar	Round Bar, Flat Bar, Square Bar	Φ8-1200mm*L	Forging, hot rolling and cold rolling, Cast	Black, Rough Turning, Shot Blasting,
Coil / Strip	Steel Coil /Steel Strip	0.03-16.0x1200mm	Cold-Rolled & Hot-Rolled	Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes	Seamless Pipes/Tubes, Welded Pipes/Tubes	OD:6-219mm x WT:0.5-20.0mm	Hot extrusion, Cold Drawn, Welded	Annealed, Solution and Aging, Q+T, ACID-WASHED

Packaging & Shipping

Place of Origin	Shandong, China
Certification	Other
Thickness	0.5, 30
Application	Structure Pipe
Surface Treatment	Bright
Technique	Cold Drawn
Standard
Alloy Or Not	Non-alloy
Grade
Outer Diameter	15 - 1216 mm
Secondary Or Not	Non-secondary
Special Pipe	Thick Wall Pipe
Section Shape	Round

JIS G3445 STKM12B Carbon steel tube for machine structural purposes

Product Features

Mechanical properties of grade STKM12B

Physical properties of grade STKM12B

STKM12B Range of products

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