420 stainless steel

420 Stainless Steel Supplier

Chemical Composition (%) of 420 Stainless Steel Plate

C	Mn	Si	P	S	Cr
0.15	1.00	1.00	0.04	0.03	12.0-14.0

Mechanical Properties of 420 Stainless Steel Plate

Tempering Temperature (°C)	Tensile Strength (MPa)	Yield Strength 0.2% Proof (MPa)	Elongation (% in 50mm)	Hardness Brinell (HB)
Annealed *	655	345	25	241 max
399°F (204°C)	1600	1360	12	444
600°F (316°C)	1580	1365	14	444
800°F (427°C)	1620	1420	10	461
1000°F (538°C)	1305	1095	15	375
1099°F (593°C)	1035	810	18	302
1202°F (650°C)	895	680	20	262
* Annealed tensile properties are typical for Condition A of ASTM A276; annealed hardness is the specified maximum.

Physical Properties of 420 Stainless Steel Plate

Density kg /m³	Thermal Conductivity W/mK	Electrical Resistivity (Microhm/cm)	Modulus of Elasticity	Coefficient of Thermal Expansion μm/m/°C	Specific Heat (J/kg.K)
7750	24.9at 212°F	550 (nΩ.m) at 68°F	200 GPa	10.3 at 32 – 212°F	460 at 32°F to 212°F

Alloy 420 is a hardenable, martensitic stainless steel that is a modification of Alloy 410. Similar to 410, it contains a minimum of 12% chromium, just sufficient enough to give corrosion resistant properties.

Alloy 420 has higher carbon content than Alloy 410 which is designed to optimize strength and hardness characteristics. It has good ductility it the annealed condition but is capable of being hardened up to Rockwell hardness 50 HRC, the highest hardness of the 12% chromium grades.

Due to its hardening properties, Alloy 420 is not often welded, although it is possible. Martensitic stainless steels are designed for high hardness and sometimes other properties are to some degree compromised.

Corrosion resistance is lower than the common austenitic grades and their useful operating range is limited by their loss of ductility at sub-zero temperatures and loss of strength by over-tempering at elevated temperatures. Its best corrosion resistance is achieved when the metal is hardened and surface ground or polished.

If you are interested in other Stainless Steel Plates/Sheets, please click 302, 303, 304, 304L, 304H, 309, 309S, 310, 310S, 310H, 316, 316L, 317/317L, 317LMN, 321, 321H, 330, 347, 347H, 904L, 403, 405, 409, 410, 410S, 410/HT, 416, 416HT, 420, 422, 430, 440C, Duplex 2205, Duplex 2304, Duplex 2507.