Custom 450* UNS S4500
A martinsitic precipitation hardening steel, Custom 450© stainless steel offers high strength combined with excellent corrosion resistance similar to 304 stainless in corrosion resistance with moderate strength similar to that of 410 stainless. As with most precipitation hardened alloys, Custom 450© stainless has excellent transverse properties.
Used when ease of welding and brazing in fabrication is required. Custom 450©, unlike many precipitation hardening grades, Custom 450© can be used in the annealed condition.
Applications: Valve parts, Paper mills, aircraft and power generation, chemical processing, nuclear and space craft.
Heat Treatment: Solution heat treatment, heat at 1875/1925f (1024/1052c cool to below 90f (32c) to allow material to fully martensite. Material can be air cooled, but should be rapidly quenched for best response to aging.
Aging: All solution treated materials: Condition H-900 4hrs and air cool. H-900 offers the best combination of ductility, strength and toughness. H-1150 increases ductility but decreases strength.