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A645 Grade B steel Plate

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Product: Hot rolled specially heat treated 5.5% Nickel alloy steel plates intended primarily for welded pressure vessels for service at low or cryogenic temperatures.
A645 Grade B steel product available : A645 Grade B Steel plates, A645 Grade B steel sheets,
A645 Grade B steel standard :ASTM A645/A645M
ASTM A645/A645M specification includes the grades : A645 Grade A, A645 Grade B
A645 Grade B delivery condition: T(Tempered), Q(Quenched), Q&T (Quenched and Tempered)

A645 Grade B pressure vessel steel chemical composition %

Grade C max Mn P max S max Si Ni Cr Mo Al Nb max
A645 Grade B 0.13 0.90-1.50 0.020 0.010 0.15-0.30 5.0-6.0 0.10-1.00 0.10-0.30 0.02-0.05 0.01

A645 Grade B pressure vessel steel Mechanical properties
Class Tensile strength Rm MPa Yield strength ReH MPa min Elongation A% min in 50mm Impact test temperature
A645 Grade B 690-830 590 20 -195 ℃


JOIN-WIN STEEL keeps enough quantity A645 Grade B steel in stock each month. We can meet our customer’s further process request like : cutting ( any size and any shape ) drilling, welding, milling, machining and steel structure.

Other pressure vessel steel grades in standard ASTM A645/A645M and ASME SA645/SA645M
A645 Grade A pressure vessel steel plates,
SA645 Grade A pressure vessel steel plates,
SA645 Grade B pressure vessel steel plates

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