A martinsitic precipitation hardening steel, Custom 450 mstainless 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.

Chemistry Analysis

Siliconmax1.0%Chromium 14.00 - 16.00%
Nickel 5.00-7.00%Columbium + Niobium 8 X C Minimum
Iron BalanceMolybdenum 0.50-1.00%

Corrosion Resistance

The following table is for reference only, many factors can affect the corrosive resistance, a corrosion test for each application should be applied.

Phosphoric acidRestrictedAcetic AcidModerate
Sodium HydroxideModerateSea WaterRestricted
Salt SprayGoodNitric AcidGood
Sulfuric AcidRestrictedHumidityExcellent
Sour oil/gasModerate  

Typical Room Temperature Tensile properties

Solution treated 1875/1925f (1024/1052c) and air cooled, followed by tempering at indicated temperature

Temper TemperatureYield 0.2%Yield 0.2%Ultimate Tensile Strength % Elongation in 2" {50.8mm}hardness Brinell
% Reduction of AreaCharpy V-notch
   0.2% offset0.2% offset   ft-lbJ
Custom 450 * machines similar to other martensitic stainless steels.
AMS 5763 5773 (type 1) ASTM A564 ASTM A705 ASME SA564 ESR AMS 2300 EN10204 DIN3.1B p
Shapes Manufactured:
Flat Bars, Square Bars, Round Bars, Rings, Hollows, Discs, Blocks and special Shapes. Send us a drawing to see how we can save you material and Machining time!