Custom 450 (XM-25, UNS S45000) is a age-hardenable martensitic stainless steel that has very good corrosion resistance and moderate strength. Although the alloy has a yield strength higher than 689 MPa in the annealed condition, it is easily fabricated. A single-step aging treatment develops higher strength with good ductility and toughness. Because it has corrosion resistance similar to alloy 304 stainless and with much higher yield strength, Custom 450 has been used in applications where alloy 304 was not strong enough. It has also replaced alloy 410 stainless directly on a strength basis where alloy 410 had insufficient corrosion resistance.
|Rod, Bar, Wire, Forgings||Plate, Sheet, Strip||Pipe, Tube|
|ASTM A564, ASTM A705, ASTM A959||ASTM A693, AMS 5859, AMS 5863||AMS 5763, AMS 5773|
* Chemical composition, %
* Physical property
|Density, g/cm3||Specific heat, J/g ℃||Thermal conductivity, W/m-k H900||Mean coefficient of thermal expansion, 75-200F||Modulus of elasticity, MPa|
* Typical mechanical property (Solution annealed)
|Tensile strength, MPa||Yield strength, MPa||Elongation, %||Hardness, Rc|
It has very good corrosion resistance and moderate strength. Although the alloy has a yield strength higher than 100 KSI (689 MPa) in the annealed condition, it is easily fabricated. A single-step aging treatment develops higher strength with good ductility and toughness.
1.Screens for the pulp and paper industry
4.Power generation applications