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A36 Chemical Requirements

Thickness, inches Up to 3/4" Over 3/4" to 1-1/2" Over 1-1/2" to 4" Over 4"
Carbon, max % 0.26 0.27 0.28 0.29
Manganese, % 0.60 - 0.90 0.60 - 0.90 0.60 - 0.90
Phosphorous, max % 0.04 0.04 0.04 0.04
Sulfur, max % 0.05 0.05 0.05 0.05
Silicon, max % 0.40 0.40 0.40 0.40
Copper, min % when copper is specified 0.20 0.20 0.20 0.20
This abridged table shows only the chemical requirements for bars. The complete table including shapes and plates can be found in the ASTM standard at www.astm.org
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