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ASTM A242 Introduction
ASTM A242 is hot rolled products of structural steels in technical delivery conditions with improved atmospheric corrosion resistance. It was first used in buildings in 1958 because it has anti-corrosion properties, and was widely used for bridges, trains, cars, trucks, container, harbor construction, oil platforms and industrial facilities and so on. It is a copper chromium alloy steel – this alloy displays a greater level of resistance to atmospheric weathering when compared to other unalloyed steels. Its chemical composition promotes the early formation of an adhering protective layer of rust when exposed to the elements.
Common Grade: ASTM standard Corten A, Corten B; GB standard 09CuPCrNi-A/B; JIS standard SPA-H; and others GB standard Q235NH, B460NH

ASTM A242 Chemical Composition

Grade/ Material Element Composition ( Max-A, Min-I)
A242  C A: 0.12
Mn A: 1.0
Si A: 0.75
P 0.06-0.15
S 0.03
V -
Cu 0.25-0.55
Cr 0.30-1.25
Ni  -

ASTM A242 Mechanical Properties
Grade Tensile Test  Ksi/MPa
A242 Tensile Strength 510-680
Yield Strength 345
Elongation -
Impact Test (if any) 

ASTM A242 Application
The mechanical characteristics and the resistance to atmospheric corrosion form this steel, the best product for the fabrication of agricultural vans and railway wagons, structures of bridges, water pipes, fans, chimneysand boilers.
The material forms its own protective layer when exposed to atmospheric elements. Essentially, the top layer corrodes protects the steel beneath it. The natural finish does not normally require any form of maintenance such as painting, which makes the material a highly cost effective alternative to other structural steels.
Mainly used for construction of tanks, containers, bridges, frame structures, vehicles, etc with the request of welded, bolted, etc.

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