Standard | 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 | |
STKM12B | ||||||
STKM12C | ||||||
STKM13A | ≤0.25 | ≤0.35 | 0.30-0.90 | ≤0.040 | ≤0.040 | |
STKM13B | ||||||
STKM13C | ||||||
STKM14A | ≤0.30 | ≤0.35 | 0.30-1.00 | ≤0.040 | ≤0.040 | |
STKM14B | ||||||
STKM14C |
Source: https://www.derbosteelpipe.com/stkm13c-jis-g3445-seamless-carbon-steel-pipe-od-150mm.html
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