JIS G3461 3462 Boiler and Heat Exchanger Steel Tube

JIS Standards

Boiler and Heat Exchanger Steel Tube

Standard

JIS G3461

JIS G3462

Application

It is used for boiler and heat exchanger inside & outside tube.

Main Steel Tube Grades

STB340, STB410, STB510, STBA12, STBA13, STBA20, STBA22, STBA24

Chemical Composition

Standard	Steel Grade	Chemical Composition %
		C	Si	Mn	P	S	Cr	Mo
JIS G3461	STB340	≤0.18	≤0.35	0.30-0.60	≤0.035	≤0.035	/	/
	STB410	≤0.32	≤0.35	0.30-0.80	≤0.035	≤0.035	/	/
	STB510	≤0.25	≤0.35	1.00-1.50	≤0.035	≤0.035	/	/
JIS G3462	STBA12	0.10-0.20	0.10-0.50	0.30-0.80	≤0.035	≤0.035	/	0.45-0.65
	STBA13	0.15-0.25	0.10-0.50	0.30-0.80	≤0.035	≤0.035	/	0.45-0.65
	STBA20	0.10-0.20	0.10-0.50	0.30-0.60	≤0.035	≤0.035	0.50-0.80	0.40-0.65
	STBA22	≤0.15	≤0.50	0.30-0.60	≤0.035	≤0.035	0.80-1.25	0.45-0.65
	STBA24	≤0.15	≤0.50	0.30-0.60	≤0.030	≤0.030	1.90-2.60	0.87-1.18

 

Mechanical Properties

Standard	Steel Grade	Mechanical Properties
		Tensile Strength MPa	Yield Strength MPa	Elongation %
JIS G3461	STB340	≥340	≥175	≥35
	STB410	≥410	≥255	≥25
	STB510	≥510	≥295	≥25
JIS G3462	STBA12	≥380	≥205	≥30
	STBA13	≥410	≥205	≥30
	STBA20	≥410	≥205	≥30
	STBA22	≥410	≥205	≥30
	STBA24	≥410	≥205	≥30