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JIS G3456 Seamless tubes

JIS G3456 Seamless tubes


JIS G3456 Carbon steel pipes, Seamless pipes for high temperature service at a temperature over 350 Degrees celsius.


  • JIS G 3456:2010
  • JIS, Japanese Industrial Standards specifies the standards used for industrial activities in Japan.

Size range of JIS G3456(mm):

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


  • Carbon steel pipes for pressure service
  • High pressure service and high temperature service ata temperature over 350Degrees celsius


  • Be packed inBare/bundles/crates/crate protection at the both sides of tubes or as per customers’ requirements.
  • Surface: Varnish coating
  • Ends: Beveled or Plain ends with Plastic caps
  • Painting: as requested.

Inspection & Certification:

  1. Certification: ISO, API, ASTM, DIN etc.
  2. Mill Test Certificate: EN10204/3.1B
  3. Third party inspection: SGS, BV, Lloyds etc.

The main products of steel / steel grade:

  • JIS G3456 STPT370
  • JIS G3456 STPT410
  • JIS G3456 STPT480

Chemical Compositions(%) of JIS G3456

Standard/ Grade C Si Mn P S
JIS G3456 STPT370 ?0.25 0.10-0.35 0.30-0.90 ?0.035 ?0.035
JIS G3456 STPT410 ?0.30 0.10-0.35 0.30-1.00 ?0.035 ?0.035
JIS G3456 STPT480 ?0.33 0.10-0.35 0.30-1.00 ?0.035 ?0.035

Mechanical Properties of JIS G3456

Standard/ Grade Yield Strength (Mpa) Tensile Strength (Mpa) Elongation (%)
JIS G3456 STPT370 ?216 ?370 ?30
JIS G3456 STPT410 ?245 ?410 ?25
JIS G3456 STPT480 ?275 ?480 ?25

Tolerance on Outside Diameter and Wall Thickness in JIS G3456

Hot Rolled
Seamless Pipes
<=50mm 0.5mm <=4mm 0.5mm
>50-160mm 1%
>160-200mm 1.6mm >4mm 12.5%
>200mm 0.8%
More that 350mm, the
Tolerance is 0.5%
Cold Drawn
Seamless Pipes
and Electric Resistant
Welded Pipes
<=40mm 0.3mm <=2mm 0.2mm
>40mm 0.8% >2mm 10%
More than 350 mm the
Tolerance is 0.5%

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