Specifications: diameter: 320 to 127 mm thickness: 0.4 to 12.7 mm Length: 6 m above, and, in accordance with customer demand, supply and other specifications of steel pipe

JIS G3445 Steel Pipe,G3445 Carbon Steel Seamless Pipes Tubin

JIS G3445 Steel Pipe
JIS G3445 Steel Pipe,G3445 Carbon Steel Seamless Pipes Tubing

Standard Steel Grade Chemical Composition(%)
C Si Mn P S
JIS G3445 STKM11A ≤0.12 ≤0.35 ≤0.60 ≤0.040 ≤0.040
STKM12A ≤0.20 ≤0.35 ≤0.60 ≤0.040 ≤0.040
STKM13A ≤0.25 ≤0.35 0.30-0.90 ≤0.040 ≤0.040
STKM14A ≤0.30 ≤0.35 0.30-1.00 ≤0.040 ≤0.040

Standard Steel Grade Mechanical properties
(Mpa)Tensile Strength (Mpa)Yield Strength (%)Elongation
JIS G3445 STKM11A ≥295 \ ≥35
STKM12A ≥345 ≥175 ≥35
STKM12B ≥390 ≥275 ≥25
STKM12C ≥470 ≥355 ≥20
STKM13A ≥375 ≥215 ≥30
STKM13B ≥440 ≥305 ≥20
STKM13C ≥510 ≥380 ≥15
STKM14A ≥410 ≥245 ≥25
STKM14B ≥500 ≥355 ≥15
STKM14C ≥550 ≥410 ≥15

Remarks 备注:

HR:hot rolled CW:cold worked  SR:stress relieved 
A:annealed  N:normalized  HF:


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