Round Bars

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Tool Steel H11 has minimal distortion during deep-hardening and air-hardening thanks to the balanced alloy content.
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SAE 8620 Alloy Steel is a low alloy nickel, chromium, molybdenum case hardening steel, generally supplied in the as-rolled condition with a maximum hardness HB 255max. SAE 8620  alloy steel offers high external strength and good internal strength, making it highly wear-resistant. SAE 8620 steel has a higher core strength than grades 8615 and 8617.SAE 8620 alloy steel is flexible during hardening treatments, thus enabling improvement of case/core properties. Prehardened and tempered (uncarbonized) 8620 can be further surface hardened by nitriding but will not respond satisfactorily to flame or induction hardening due to its low carbon content. SAE 8620 alloy steel is suited for applications that require a combination of toughness and wear resistance. This grade is commonly supplied in a round bar. 

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Product Details:

M-2 is a tungsten-molybdenum high-speed steel. It is a popular grade for cutting and non-cutting applications. ... In addition, M2 steel has a resistance to decarburization that is characteristic of tungsten types and M2 offers an excellent combination of red hardness, toughness, and wear resistance.