ASTM A203 Grade E is a high-nickel pressure vessel steel plate engineered for welded equipment operating in severe low-temperature environments. With its 9% Ni alloy composition, A203 Gr.E delivers exceptional impact toughness, stable weldability, and reliable strength retention under deep-cryogenic service conditions. This grade is widely used in LNG storage tanks, cryogenic reactors, gas-liquefaction systems, and other applications requiring maximum low-temperature resistance and long-term structural integrity.
Chemical Composition

C	Mn	P	S	Si	Ni
≤0.13	0.40–0.60	≤0.025	≤ 0.025	0.15–0.30	8.25–9.75

 
Mechanical Properties

Property	Yield Strength	Tensile Strength	Elongation	Impact Energy
Requirement	≥ 345 MPa	585-760MPa	≥ 20%	Outstanding cryogenic performance (per ASTM A203 requirements)

 
Dimensions

Thickness	3–150 mm
Width	1220–4200 mm
Length	5000–18000 mm
Supports custom cutting and shaping.

  
Stock & Processing
Regular stock for A203 Grade E
Cutting, drilling, welding, bending, machining
Custom dimensions available
Fast delivery for project orders
Global supply capability
 
Applications
LNG storage tanks & terminals
Deep-cryogenic pressure vessels
Gas-liquefaction and separation units
Low-temperature reactors
Welded components requiring 9% Ni toughness