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Metal Properties

Type 446 Martensitic Stainless Steel

 
Application & Characteristics
Has greatest heat and electrical resistance of stainless steels. Resists corrosion well. Excellent glass-to-metal seals.
 
Chemical Composition (%)
C 27; N added 0.10-0.25; Balance Fe. Allowable maximums; C 0.20; Mn 1.50; Si 1.00; P 0.04; S 0.030
 
Physical Properties
Melting Range (°F) 2550 – 2750
Density (lbs/in³) 68F 0.273
Thermal Expansion (in/in °Fx10 to the power of -6) 5.5 (0 – 600F)
Electrical Resistivity (ohms/cir mil/ft.) 68F 342
 
Mechanical Properties – Temper = A
Tensile Strength (psi x 10³) 90
Yield Strength (psi x 10³) 60
Elongation ( % ) 30
Hardness B85(Rockwell)
 
Mechanical Properties – Temper = H/2
Tensile Strength (psi x 10³) 105
Yield Strength (psi x 10³) 80
Elongation ( % ) 15
Hardness B95(Rockwell)
 
Mechanical Properties – Temper = H
Tensile Strength (psi x 10³) 125
Yield Strength (psi x 10³) 95
Elongation ( % ) 5
Hardness C25(Rockwell)