Alloy 455 is an alloy melted by several sources. Custom 455® is a trademarked name of Carpenter Specialty Alloys. It is a martensitic age-hardenable stainless steel that offers a unique set of qualities. This alloy is double vacuum-melted using a Vacuum Induction Melt (VIM) followed by a Vacuum Arc Remelt (VAR).
|AMS 5617G #1|
|Modulus Of Elasticity||29.0 psi x 106|
|Electrical Resistivity||758 µohms-mm|
|Thermal Conductivity||18.0 W/mK (100°C)|
A reducing atmosphere is preferred for thermal treatment, but inert gas can be used. Alloy 455 will fully anneal at 950-980°C in just a few minutes. Alloy 455 can minimally age harden with a loss in ductility, when held for prolonged periods at 370C-540°C. Original hardness can be restored by heating at 590°C.
Alloy 455 is a great material in that you can fabricate a part from material at a lower ultimate tensile strength and then heat treat it to a much higher strength. Unlike many other heat treatable alloys, Alloy 455 has good oxidation resistance at room temperature. Primary end applications are: needles, stylets, pins and springs.
(10" gauge length)
Values are typical and may not represent all diameters. Test method will affect results.
Stainless steels develop a highly polished appearance as they are drawn to fine diameters. Surface roughness can be less than 5 RMS when processed using SCND* dies and measured with a profilometer. Diameters over 0.040" are finished with polycrystalline dies and exhibit a rougher surface than natural diamond dies. Diameters over 0.100" will have an even rougher surface because they are drawn with carbide dies.
*SCND means single crystal natural diamond.