Steel Grade E-4130 is also known as Chromoly Steel has approximately 0.30% carbon by weight. This alloy contains chromium and molybdenum to help give strength and corrosion resistance. Chromium helps to increase the hardenability and corrosion resistance and the molybdenum helps to increase toughness.
An electric-furnace processed, E-8740 is a Nickel Chrome Molybdenum alloy produced for case hardening. It is a very tough alloy, with excellent shock resistance and especially free from temper brittleness.
Alloy E-4330 is a high-strength alloy steel containing chromium, nickel and molybdenum with a carbon content in the range of 0.30% range. It is heat treatable and offers good formability and machinability with exceptional cold working characteristics.
A high carbon, chromium electric-furnace processed alloy, 52100 is primarily a bearing steel possessing a high resistance to wear and abrasion. It also is a moderately deep hardening alloy with low softening resistance to elevated temperatures.
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