Standard: ASTM A192
Seamless carbon steel boiler tubes for high-pressure service
●  Application: for boilers, super heaters, heat-exchangers, and high- pressure.
●  Size range: O.D.: 6-101.6mm W.T.: 1-15mm L: 12000mm max. 

Table 1: Steel grade and chemical composition:

C	0.06-0.18
Mn	0.27-0.63
P	≤0.035
S	≤0.035
Si	≤0.25

 

Mechanical property:
Tensile strength: min 47 ksi (325 Mpa)
Yield strength: min 26 ksi (180Mpa)
Elongation: ≥35%

Hardness
Brinell hardness: W.T≥0.200 inches (5.1mm), then 137HB
Rockwell hardness: W.T≥0.200 inches (5.1mm), then 77HRB

Tolerance for O.D. and W.T.(SA-450/SA-450M)

O.D. inch (mm)	+	-	W.T. inch (mm)	+	-
<1”(25.4)	0.10	0.10	≤1.1/2”(38.1)	20%	0
1”-1.1/2”(25.4-38.1)	0.15	0.15	>1.1/2”(38.1)	22%	0
1.1/2”-2”(38.1-50.8)	0.20	0.20	-	-	-
2”-2.1/2”(50.8-63.5)	0.25	0.25	-	-	-
2.1/2”-3”(63.5-76.2)	0.30	0.30	-	-	-
3”-4”(76.2-101.6)	0.38	0.38	-	-