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Home > ASTM > ASTM A738 Grade C Hot Rolled Boiler Plate,ASTM A738 Grade C Hot Rolled Boiler Plate

ASTM A738 Grade C Hot Rolled Boiler Plate,ASTM A738 Grade C Hot Rolled Boiler Plate

ASTM A738 Grade C is a kind of C-Mn-Si steel plates material used to fabric middle or low temperature pressure vessels. Obviously, A738 is divided into three grades or levels :A738 Gr. A, A738 Gr. B, A738 Gr. C . In order to meet the property requirement of ASTM SA-738/SA-738M standard, this material must be done heat-treatment.

Key words: A738 Grade C,ASTM A738Grade C,A738 Grade C C-Mn-Si steel plates,A738 Grade C for fabric middle or low temperature pressure vessels,A738 Grade C Hot Rolled Boiler Plate.

ASTM A738 Grade C steel chemical composition (%) :

Compostion			A738 Grade C
C ≤ ①			0.20
Mn	Heat analyse	Thickness ≤65mm	≤1.50
		Thickness＞65mm	≤1.60
	Product analyse	Thickness ≤65mm	≤1.62
		Thickness＞65mm	≤1.72
P ≤ ① S ≤ ①			0.025
Si	Heat analyse		0.15~0.50
	Product analyse		0.13~0.55
Cu ≤	Heat analyse		0.35
	Product analyse		0.38
Ni ≤	Heat analyse		0.50
	Product analyse		0.53
Cr ≤	Heat analyse		0.25
	Product analyse		0.29
Mo ≤	Heat analyse	Thickness ≤40mm	0.08
		Thickness＞40mm	0.08
	Product analyse	Thickness ≤40mm	0.09
		Thickness＞40mm	0.09
V ≤	Heat analyse		0.05
	Product analyse		0.05
Nb ≤	Heat analyse		②
	Product analyse		②
Nb+V ≤	Heat analyse		③
	Product analyse		③

① means be suitable for both heat analyse and product analyse

② After agreement,can add V and Nb

③ For Grade C, Nb is not the required composition.

ASTM A738 Grade C steel mechanical properties :

Grade

Tensile strength

Ksi , [Mpa ]

Yield strength

Ksi , [Mpa ]

Elongation

In 2 in.[50mm],min,%

Grade B

850-100

[550-690]

[415]

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