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Grade STB510
Corresponding Standard JIS G 3461-2019
Carbon Steel Boiler and Heat Exchanger Tubes
Classification Carbon Steel
STB510 Chemical Element Composition Content (%)
Component C Si Mn P S
Minimum Value - - 1 - -
Maximum Value 0.25 0.35 1.5 0.035 0.035
STB510 Mechanical Properties
wall thickness
t
mm		 Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
%
≥510 ≥295 Longitudinal:
OD < 10mm,
Sample No. 11
> 17
10 ≤ OD < 20mm,
Sample No. 11
> 20
OD ≥ 20mm,
Sample No. 11, No. 12
> 25
1＜t≤2 Sample No. 12:
≥ 16
2＜t≤3 Sample No. 12:
≥ 18
3＜t≤4 Sample No. 12:
≥ 19
4＜t≤5 Sample No. 12:
≥ 20
5＜t≤6 Sample No. 12:
≥ 22
6＜t≤7 Sample No. 12:
≥ 24
7＜t≤8 Sample No. 12:
≥ 25

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