Products
Our Products
Capabilities
Alloys
Services
Contact Ulbrich
Markets
Medical
Aerospace
Automotive
Oil & Gas
Other Markets
Contact Ulbrich
Company
About Ulbrich
Ulbrich Blog
Quality Committment
Resources
Careers
Contact Ulbrich
Contact Ulbrich
Careers
420 High Carbon Steel is a martensitic stainless steel that provides good corrosion resistance plus increased strength and hardness when compared to 410 Stainless. It is magnetic in both the annealed and hardened conditions.
Tempered 420HC Steel Strip, As Rolled, AMS 5506, ASTM A240
Cutlery, Surgical and dental instruments, Scissors, Tapes, Straight edges, Fasteners, Firearms
Type 420HC is a martensitic stainless steel that provides good corrosion resistance similar to 410 plus increased strength and hardness. It is magnetic in both the annealed and hardened conditions. Maximum corrosion resistance is attained only in the fully hardened condition. It is never used in the annealed condition. 420HC Steel also offers good ductility when annealed and excellent corrosion resistance properties when the metal is polished, surface ground or hardened.
Carbon: 0.4 - 0.45
Manganese: 1.0 max
Silicon: 0.25 - 0.75
Phosphorus: 0.04 max
Sulfur: 0.015 max
Chromium: 12.5 - 13.5
Nickel: 0.5 max
Molybdenum: 0.5 max
Aluminum: 0.5 max
Copper: 0.5 max
Tin: 0.05 max
Nitrogen: 0.08 max
Density: 0.28 lbs/in3 7.74 g/cm3
Electrical Resistivity: microhm-in (microhm-cm): 68 °F (20 °C): 21.71 (55.0)
Specific Heat: BTU/lb/°F (kJ/kg•K):
32 - 212 °F (0 - 100 °C): 0.11 (0.46)
Thermal Conductivity: BTU/hr/ft2/ft/°F (W/m•K):
At 212 °F (100 °C): 14.4 (24.9)
At 932 °F (500 °C): 16.6 (28.7)
Mean Coefficient of Thermal Expansion: in/in/°F (μm/m•K)
32 - 212 °F (0 – 100 °C): 5.7 x 10-5 (10.2)
32 - 1200 °F (0 – 649 °C): 6.8 x 10-5 (12.1)
Modulus of Elasticity: ksi (MPa)
29 x 103 (200 x 103) tension
Magnetic Permeability: Magnetic
Melting Range: 2723 °F (1495 °C)
Coil - Strip
Hardness:
40 - 52 Rockwell C Scale
Properties: Tempered
Type 420HC can be cold rolled to various tempers. Please consult Ulbrich Technical Services for
additional information.
Corrosion Resistance
Type 420HC provides full corrosion resistance when hardened or hardened and tempered.
In these conditions, its corrosion resistance is similar to type 410.
Refer to NACE (National Association of Corrosion Engineers) for recommendations.