JIS G3456 Carbon steel pipes for high temperature service

pipe fittings materials data

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For the pipe fitting material, please check butt-weld-fitting-standard-data

Pipe under JIS G3456 standard is suitable for high temperature with hollow round section. It is often exposed to high temperature and high pressure conditions when used, so it has high lasting strength, high antioxidant and mechanical properties. For example superheated tube of high pressure and ultra-high pressure boilers, gas-guide tube, main steam pipe are made of high temperature seamless steel pipes.

Grade: STPT 370, STPT410, STPT480

The method of manufacture:

The pipe shall be manufactured from coarse-grained killed steel by the seamless or electric resistance welding process. However, the pipe of grade STPT480 shall be manufactured by the seamless process. The pipes by hot-finished shall be heat treatment as per requirement between purchaser and manufacturer. But the pipes by cold-finished must be heat treated for low temperature annealing or normalizing.

Chemical composition and mechanical properties of JIS G3456:

GradeCSiMnP/STensile StrengthYield StrengthElongation %
STPT 370≤0.250.10-0.350.30-0.90≤0.035≥370 MPa≥215 MPa30%
STPT 410≤0.300.10-0.350.30-1.00≤0.035≥410 MPa≥245 MPa25%
STPT 480≤0.330.10-0.350.30-1.00≤0.035≥480 MPa≥275 MPa25%

Pipe end and packing:

End type: plain ends, bevel ends, screw thread, grooved. When the purchaser requires, the end of pipe may be beveled with 30°-0°/+5°. Root face shall be 1.6mm +/- 0.8mm. Otherwise, the end of pipe usually are plain.

Ends packing: plastic caps for OD1/8  to 24in, ends protector for larger size.



1. The pipe shall be practically straight, and its both ends shall be at right angles to the axes.

2. The inside and outside surfaces of the pipe shall be well-finished, and free from detrimental defects to use.

3. The body of pipe can be varnished painting, galvanized, anti-corrosion(3LPE, 3PP......).

Dimensional control of seamless steel pipe:

All dimensions will be supplied according to standard; In addition, the following tolerances apply:

(a) Pipe body: +/- 0,75%

(b) Length: -0 / +100mm

(c) Wall thickness: +15%, -12,5%

C&N Huitong group can produce pipe fittings of such materials :

ASTM Standard MaterialASTM A53 A53M Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless
ASTM A106 A106M Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service
API 5L Specification for Line Pipe
ASTM A213 2018 Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
ASTM A312 A312M Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
ASTM A234 A234M Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service
ASTM A403 A403M Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings
ASTM A420 A420M Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service
ASTM A860 A860M Standard Specification for Wrought High-Strength Low-Alloy Steel Butt-Welding Fittings
ASTM A733 Standard Specification for Welded and Seamless Carbon Steel and Austenitic Stainless Steel Pipe Nipples
DIN Standard MaterialDIN1629 Seamless Circular Unalloyed Steel Tubes Subject to special requirements
DIN 2440 Medium-weight threaded steel tubes
DIN 2441 Steel Tubes Heavy Weight For Suitable For Screwing
GOST Standard MaterialGOST-1050 Sized Bars Made of High-Quality Structural Carbon Steel With a Special Surface Finish
GOST 8732 Seamless hot-deformed steel pipes-Range of sizes
GOST 19281 Rolled Steel With Enhanced Strength
JIS Standard MaterialJIS G3452 Carbon steel pipes for ordinary piping
JIS G3454 Carbon steel pipes for pressure service
JIS G3455 Carbon steel pipes for high pressure service
JIS G3456 Carbon steel pipes for high temperature service
JIS G3457 Arc welded carbon steel pipes
JIS G3458 Alloy Steel Pipes
JIS G3459 Stainless steel pipes
JIS G3460 Steel pipes for low temperature service
BS EN Standard MaterialBS EN 10255 Non-alloy steel tubes suitable for welding and threading Technical delivery conditions
BS EN 10253-1 Butt-Welding Pipe Fittings  Part 1: Wrought Carbon Steel for General Use and Without Specific Inspection Requirements
BS EN 10253-2 Butt-welding pipe fittings. part 2: Non alloy ferritic alloy steels with specific inspection requirements
BS EN10253-3 Butt-welding pipe fittings Part 3: Wrought austenitic and austenitic-ferritic (duplex) stainless steels without specific inspection requirements
BS EN 10253-4 Butt-welding pipe fittings Part 4:Wrought austenitic and austenitic-ferritic (duplex)stainless steels with specific inspection requirements