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JIS G3445 steel pipe

JIS G3445 steel pipe

jis-g3445-steel-pipe

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 Compositions(%)

Grade C Si Mn P S
STKM11A ≤0.12 ≤0.35 ≤0.60 ≤0.040 ≤0.040
STKM12A ≤0.20 ≤0.35 ≤0.60 ≤0.040 ≤0.040
STKM12B ≤0.20 ≤0.35 ≤0.60 ≤0.040 ≤0.040
STKM12C ≤0.20 ≤0.35 ≤0.60 ≤0.040 ≤0.040
STKM13A ≤0.25 ≤0.35 0.30-0.90 ≤0.040 ≤0.040
STKM13B ≤0.25 ≤0.35 0.30-0.90 ≤0.040 ≤0.040
STKM13C ≤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
STKM14B ≤0.30 ≤0.35 0.30-1.00 ≤0.040 ≤0.040
STKM14C ≤0.30 ≤0.35 0.30-1.00 ≤0.040 ≤0.040

Mechanical Properties

Grade Yield Strength (Mpa) Tensile Strength (Mpa) Elongation (%)
STKM11A ≥290 ≥35
STKM12A ≥175 ≥340 ≥35
STKM12B ≥275 ≥390 ≥25
STKM12C ≥355 ≥470 ≥20
STKM13A ≥215 ≥370 ≥30
STKM13B ≥305 ≥440 ≥20
STKM13C ≥380 ≥510 ≥15
STKM14A ≥245 ≥410 ≥25
STKM14B ≥355 ≥500 ≥15
STKM14C ≥410 ≥550 ≥15

Read more:
JIS Japanesee Industrial Standard

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