R&D

Carbon steel pipe for pressure pipelines, high pressure application and high temperature application.

Standard:

JIS G3454, JIS G3455, JIS G3456

Application:

JIS G3454: it is use as carbon steel pipe for pressure pipeline in the condition under 350°C temperature.

JIS G3455: it is use as carbon steel pipe for pipeline where the temperature is less than 350°C with high working pressure.

JIS 3456: it is use as carbon steel pipeline in the condition that over 350°C.

Main Steel Tube Grades:

STPG370, GTPG410, STS370, STS410, STS480, STPT370, STPT410, STPT480

Chemical composition & Mechanical properties:

Grade	C	Si	Mn	P	S	Ts (Mpa)	Ys (Mpa)	E (%)
STPG 370	≤ 0.25	≤ 0.35	0.30-0.90	≤ 0.040	≤ 0.040	≥ 370	≥ 215	30
STPG 410	≤ 0.30	≤ 0.35	0.30-1.00	≤ 0.040	≤ 0.040	≥ 410	≥ 245	25
STS 370	≤ 0.25	0.10-0.35	0.30-1.10	≤ 0.035	≤ 0.035	≥ 370	≥ 215	30
STS 410	≤ 0.30	0.10-0.35	0.30-1.40	≤ 0.035	≤ 0.035	≥ 410	≥ 245	25
STS 480	≤ 0.33	0.10-0.35	0.30-1.50	≤ 0.035	≤ 0.035	≥ 400	≥ 275	25
STPT 370	≤ 0.25	0.10-0.35	0.30-0.30	≤ 0.035	≤ 0.035	≥ 370	≥ 215	30
STPT 410	≤ 0.30	0.10-0.35	0.30-1.00	≤ 0.035	≤ 0.035	≥ 410	≥245	25
STPT 480	≤ 0.33	0.10-0.35	0.30-1.00	≤ 0.035	≤ 0.035	≥ 480	≥ 275	25