Chronifer M13 AISI 420/420C EN 10088-3, ASTM F-899 Hardenable
Stainless Steel Bar ROHS conformed
420 Stainless Steel Strip, Coil, Foil, Wire, AMS 5506, ASTM A240
APPLICATIONS
DESCRIPTION
Type 420 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.
CHEMISTRY TYPICAL
Carbon: 0.20-0.25
Manganese: 1.00 max
Silicon: 1.00 max
Chromium: 12.00-14.00
Nickel: 0.50 max
Molybdenum: 0.50 max
Phosphorus: 0.040 max
Sulfur: 0.030 max
Copper: 0.50 max
Aluminum: 0.15 max
Tin: 0.050 max
Iron: Balance
PHYSICAL PROPERTIES
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 10·6 (10.2)
32 - 1200 ° F (0- 649 °C): 6.8 x 10·6 (12.1)
Modulus of Elasticity: ksi (MPa)
29 x 103 (200 x 103) in tension
Magnetic Permeability: Magnetic
Melting Range: 2723 ° F (1495 °C)
FORMS
Coil - Strip, Foil, Ribbon
Wire - Profile, Round, Flat, Square
MECHANICAL PROPERTIES AT ROOM TEMPERATURE
PROPERTIES: ANNEALED
Ultimate Tensile Strength: 100 KSI max (690 MPa max)
Elongation: 15% min
Hardness: B 96 max
PROPERTIES: TEMPERED
Type 420 can be cold rolled to various tempers. Please consult
Ulbrich Technical Services for additional information.
ADDITIONAL PROPERTIES
CORROSION RESISTANCE
Type 420 provides full corrosion resistance only in the 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.
FINISHES
# 1 - Hot rolled annealed and descaled. It is available in strip,
foil and ribbon. It is used for applications where a smooth
decorative finish is not required.
# 2D - Dull finish produced by cold rolling, annealing and
descaling. Used for deep drawn parts and those parts that need to
retain lubricants in the forming process. # 2B - Smooth finish
produced by cold rolling, annealing and descaling. A light cold
rolling pass is added after anneal with polished rolls giving it a
brighter finish than 2D.
#BA- Bright annealed cold rolled and bright annealed
#CBA- Course bright annealed cold rolled matte finish and bright
anneal
#2 - Cold Rolled
# 2BA- Smooth finish produced by cold rolling and bright annealing.
A light pass using highly polished rolls produces a glossy finish.
A 2BA finish may be used for lightly formed applications where a
glossy finish is desired in the formed part. Polished - Various
grit finish for specific polish finished requirements.
* Not all finishes are available in all alloys - Contact Ulbrich
Sales for more information.
WIRE FINISHES
XC - Extra clean bright annealed or bright annealed and cold rolled
Grease - Ultra-bright finish (for decorative applications) Soap -
Soap is not removed from tempered wire to act as a lubricant. *
Contact Ulbrich Wire for custom wire finishes.
COLD FORMING
Type 420 can be moderately drawn and formed in the annealed
condition.
HEAT TREATMENT
Alloy 420 can be hardened by cold working and by heat treating.
Please refer to Ulbrich Technical Services Department for more
information. Alloy 420 is capable of being heat treated to a
hardness of HRC 51 minimum.
WELDING
The martensitic class of stainless steels has limited weldability
due to its hardenability. For best results refer to: SSINA's
"Welding of Stainless Steels and Other Joining Methods" .
