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4140 Chemistry
ASTM A311
Stressproof®
Carbon
0.38 / 0.43
Manganese
0.75 / 1.00
Phosphorus
0.035 Max.
Sulfur
0.04 Max.
Silicon
0.15 / 0.35
Molybdenum
0.15 / 0.25
Chromium
0.80 / 1.10