STBA12 - JIS G 3462-2019

Grade	STBA12
Corresponding Standard	JIS G 3462-2019 Alloy Steel Tubes for Boiler and Heat Exchanger
Classification	Alloy Steel

STBA12 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Mo
Minimum Value	0.1	0.1	0.3	-	-	0.45
Maximum Value	0.2	0.5	0.8	0.035	0.035	0.65

• Addition of Cr is permitted to a level where chemical composition of the grade concerned remains distinguishable, after the addition of Cr, from those of all other grades.

STBA12 Mechanical Properties

outside diameter d mm	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
d＜10	≥380	≥205	≥22
10≤d＜20	≥380	≥205	≥25
d≥20	≥380	≥205	≥30

Approximate Comparison Table Structural Alloy Steel

Japan	United States	International Organization for Standardization	Germany	France	European Standard		Sweden	United Kingdom
JIS	ASTM	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade	SS	BS EN/BS
STBA12	A204Gr.A A204Gr.B	F26 P26 TS26	15Mo3 16Mo3	15D3	16Mo3	1.5415	2912	1503-243B 240 243

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!