Alloy

4140 - It machines well in the annealed condition. When this alloy (metal) has been heat treated there are limitations to machining and grinding. 4140 also is available in a pre hardened condition. 

4130 - This alloy (metal) is readily machined by conventional methods. Machinability is best with the alloy in the normalized and tempered condition. Although the alloy may be machined in the fully heat treated condition, machinability becomes more difficult with increasing strength (hardness) of the alloy.

 8620 - A case hardening alloy (metal) that may be used where high surface strength, a tough ductile core and excellent wear characteristics are needed. It provides relatively low distortion during heat treatment and safe hardening over a wide hardness range. Cold finished bars are Calcium Treated providing better machinability and tool life then regular AISI 8620.

 4340 - it’s a heat treatable, low alloy steel containing nickel, chromium and molybdenum. It is known for its toughness and capability of developing high strength in the heat treated condition while retaining good fatigue strength.

 P20 - is a pre hardened high tensile tool steel which offers ready machineability in the hardened and tempered condition, therefore does not require further heat treatment . This eliminates the risks, cost, and waiting time of heat treatment thus avoiding the associated possibility of distortion or even cracking. Subsequent component modifications can easily be carried out.

~Steel 1 Company LLC will Blanchard grind, Mattison grind, or Machine complete, any material to your specifications~