Ferrous Alloys

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) 68F0.273
Thermal Expansion (in/in °Fx10 to the power of -6)5.5 (0 – 600F)
Electrical Resistivity (ohms/cir mil/ft.) 68F342
Mechanical Properties – Temper = A
Tensile Strength (psi x 10³)90
Yield Strength (psi x 10³)60
Elongation ( % )30
HardnessB85(Rockwell)
Mechanical Properties – Temper = H/2
Tensile Strength (psi x 10³)105
Yield Strength (psi x 10³)80
Elongation ( % )15
HardnessB95(Rockwell)
Mechanical Properties – Temper = H
Tensile Strength (psi x 10³)125
Yield Strength (psi x 10³)95
Elongation ( % )5
HardnessC25(Rockwell)

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