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AISI Type 420 Stainless Steel, tested at 205°C (400°F)

Subcategory: Ferrous Metal; Heat Resisting; Metal; Stainless Steel; T 400 Series Stainless Steel

Key Words: UNS S42000, AMS 5506, AMS 5621, ASTM A276, ASTM A314, ASTM A473, ASTM A580, FED QQ-S-763, FED QQ-S-766, FED QQ-W-423, MIL SPEC MIL-S-862, SAE J405 (51420), B.S. 420 S 37, B.S. CDS-18 (U.K), martensitic, DIN 1.4021, AFNOR Z 20 C 13 (Fr), UNI X 20 Cr 13, JIS SUS 420 J1, SS14 2303 (Sweden), ISO 683/13 4

Component    Wt. % C Min 0.15   Cr 13   Fe 85   Mn Max 1   P Max 0.04   S Max 0.03   Si Max 1

Material Notes:
16.0 mm diameter bar, austenitized at 980°C for 30 minutes, oil quench, temper for 2 hours at 28°C above test temperature

Physical Properties	Metric	English	Comments
Density	7.8 g/cc	0.282 lb/in³
Mechanical Properties
Hardness, Brinell	506	506	Converted from Rockwell C Hardness
Hardness, Knoop	562	562	Converted from Rockwell C Hardness
Hardness, Rockwell C	51.5	51.5	before testing, 51 after
Hardness, Vickers	541	541	Converted from Rockwell C Hardness
Tensile Strength, Ultimate	1820 MPa	264000 psi
Tensile Strength, Yield	1085 MPa	157000 psi	at 0.2% offset
Elongation at Break	11.5 %	11.5 %	in 50 mm
Charpy Impact	100 J	73.8 ft-lb	annealed (tested at room temperature), 14 J quenched and tempered (tested at room temperature)
Shear Modulus	80.7 GPa	11700 ksi
Electrical Properties
Electrical Resistivity	5.5e-005 ohm-cm	5.5e-005 ohm-cm	at 20°C
Thermal Properties
CTE, linear 20°C	10.3 µm/m-°C	5.72 µin/in-°F	from 0-100°C (32-212°F)
CTE, linear 250°C	10.8 µm/m-°C	6 µin/in-°F	at 0-315°C (32-600°F)
CTE, linear 500°C	11.7 µm/m-°C	6.5 µin/in-°F	0-540°C, 12.2 at 0-650°C
Specific Heat Capacity	0.46 J/g-°C	0.11 BTU/lb-°F	from 0-100°C (32-212°F)
Thermal Conductivity	24.9 W/m-K	173 BTU-in/hr-ft²-°F	at 100°C
Melting Point	1455 - 1510 °C	2650 - 2750 °F
Solidus	1455 °C	2650 °F
Liquidus	1510 °C	2750 °F
Maximum Service Temperature, Air	620 °C	1150 °F	Continuous Service
Maximum Service Temperature, Air	735 °C	1360 °F	Intermittent Service

References are available for this material.