4140 0.750" RD 7" HRA Hand Tool Blank
$7.95
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4140 is an oil hardening medium carbon alloy steel suitable for making most blacksmith's tools such as hammers, punches, top and bottom tools, dies, and axes. Element : Content % Chromium: 0.80 - 1.10 Manganese: 0.75 - 1.0 Carbon: 0.380 - 0.430 Silicon: 0.15 - 0.30 Molybdenum: 0.15 - 0.25 Sulfur: 0.040 Phosphorous: 0.035 Iron: Balance
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