ASTM A543 / A543M Type C Class 3

Chemical Properties

Carbon Manganese Phosphorus,max Sulfur,max Silicon Nickel Chromium Molybdenum
0.18 0.40 0.020 0.020 0.13–0.45 1.93–3.57 0.94–1.96 0.16–0.69

Note: A Applies to both heat and product analyses.

Mechanical Properties

Class Tensile strength,min:
ksi [MPa]
Yield strength,min:
ksi [MPa]
Elongation in 2 in. [50 mm] min, %A,B
Class 3 90–115 [620–795] 70 [485] 16

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