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A242

ASTM A242 steel is a high strength low-alloy structural steel ASTM specification with improved atmospheric corrosion resistance. This specification is normally applicable to steel plates through one-half inch in thickness.

The atmospheric corrosion resistance of A242 is substantially better than that of carbon steels such as A36 and A572-50 with or without copper addition. When properly exposed to the atmosphere, A242 is suitable for many applications in the unpainted condition. ASTM 242 is a weathering steel which develops a natural rust patina which protects the steel from exposure.
ASTM A242 has a 50ksi minimum yield strength and a 70ksi minimum tensile strength.

A242 Steel Plate for Sale

Properties of ASTM A242 Steel Plates:

Component Elements Properties Metric English Comments
Aluminum, Al  89.3 - 93.1 % 89.3 - 93.1 % As remainder
Chromium, Cr  0.15 - 0.25 % 0.15 - 0.25 %  
Copper, Cu  3.7 - 4.5 % 3.7 - 4.5 %  
Iron, Fe  <= 0.80 % <= 0.80 %  
Magnesium, Mg  1.2 - 1.7 % 1.2 - 1.7 %  
Manganese, Mn  <= 0.10 % <= 0.10 %  
Nickel, Ni  1.8 - 2.3 % 1.8 - 2.3 %  
Other, each  <= 0.050 % <= 0.050 %  
Other, total <= 0.15 % <= 0.15 %  
Silicon, Si  <= 0.60 % <= 0.60 %  
Titanium, Ti  0.070 - 0.20 % 0.070 - 0.20 %  
Zinc, Zn  <= 0.10 % <= 0.10 %