Heat Treated (HT) 422 Stainless Steel
Heat treated AISI 422 is AISI 422 stainless steel in the heat treated (HT) condition. The graph bars on the material properties cards below compare heat treated AISI 422 to: wrought martensitic stainless steels (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Brinell Hardness
330
Elastic (Young's, Tensile) Modulus
200 GPa 28 x 106 psi
Elongation at Break
15 %
Fatigue Strength
500 MPa 73 x 103 psi
Impact Strength: V-Notched Charpy
12 J 9.1 ft-lb
Poisson's Ratio
0.28
Reduction in Area
34 %
Rockwell C Hardness
21
Shear Modulus
76 GPa 11 x 106 psi
Shear Strength
660 MPa 95 x 103 psi
Tensile Strength: Ultimate (UTS)
1080 MPa 160 x 103 psi
Tensile Strength: Yield (Proof)
870 MPa 130 x 103 psi
Thermal Properties
Latent Heat of Fusion
270 J/g
Maximum Temperature: Corrosion
380 °C 720 °F
Maximum Temperature: Mechanical
650 °C 1200 °F
Melting Completion (Liquidus)
1480 °C 2700 °F
Melting Onset (Solidus)
1470 °C 2680 °F
Specific Heat Capacity
470 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
24 W/m-K 14 BTU/h-ft-°F
Thermal Expansion
10 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
4.7 % IACS
Electrical Conductivity: Equal Weight (Specific)
5.3 % IACS
Otherwise Unclassified Properties
Base Metal Price
11 % relative
Density
7.9 g/cm3 490 lb/ft3
Embodied Carbon
3.1 kg CO2/kg material
Embodied Energy
44 MJ/kg 19 x 103 BTU/lb
Embodied Water
100 L/kg 12 gal/lb
Common Calculations
PREN (Pitting Resistance)
17
Resilience: Ultimate (Unit Rupture Work)
150 MJ/m3
Resilience: Unit (Modulus of Resilience)
1910 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
38 points
Strength to Weight: Bending
30 points
Thermal Diffusivity
6.4 mm2/s
Thermal Shock Resistance
39 points
Alloy Composition
| Fe | 81.9 to 85.8 | |
| Cr | 11 to 12.5 | |
| Mo | 0.9 to 1.3 | |
| W | 0.9 to 1.3 | |
| Mn | 0.5 to 1.0 | |
| Ni | 0.5 to 1.0 | |
| Si | 0 to 0.5 | |
| V | 0.2 to 0.3 | |
| C | 0.2 to 0.25 | |
| P | 0 to 0.025 | |
| S | 0 to 0.025 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ASTM A565: Standard Specification for Martensitic Stainless Steel Bars for High-Temperature Service
ASTM A176: Standard Specification for Stainless and Heat-Resisting Chromium Steel Plate, Sheet, and Strip
ASTM A276: Standard Specification for Stainless Steel Bars and Shapes
Advanced Materials in Automotive Engineering, Jason Rowe (editor), 2012
ASTM A959: Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels
Corrosion of Stainless Steels, A. John Sedriks, 1996
ASM Specialty Handbook: Stainless Steels, J. R. Davis (editor), 1994
Advances in Stainless Steels, Baldev Raj et al. (editors), 2010