MakeItFrom.com
Menu (ESC)

AISI 422 Stainless Steel vs. AISI 312 Stainless Steel

Both AISI 422 stainless steel and AISI 312 stainless steel are iron alloys. They have 80% of their average alloy composition in common.

For each property being compared, the top bar is AISI 422 stainless steel and the bottom bar is AISI 312 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260 to 330
250
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 15 to 17
28
Fatigue Strength, MPa 410 to 500
370
Poisson's Ratio 0.28
0.27
Reduction in Area, % 34 to 40
56
Rockwell C Hardness 21
27
Shear Modulus, GPa 76
80
Shear Strength, MPa 560 to 660
510
Tensile Strength: Ultimate (UTS), MPa 910 to 1080
780
Tensile Strength: Yield (Proof), MPa 670 to 870
510

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Maximum Temperature: Corrosion, °C 380
450
Maximum Temperature: Mechanical, °C 650
1100
Melting Completion (Liquidus), °C 1480
1430
Melting Onset (Solidus), °C 1470
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 24
16
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 4.7
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 5.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 11
17
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 3.1
3.4
Embodied Energy, MJ/kg 44
48
Embodied Water, L/kg 100
170

Common Calculations

PREN (Pitting Resistance) 17
33
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 150
190
Resilience: Unit (Modulus of Resilience), kJ/m3 1140 to 1910
640
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32 to 38
28
Strength to Weight: Bending, points 26 to 30
24
Thermal Diffusivity, mm2/s 6.4
4.3
Thermal Shock Resistance, points 33 to 39
21

Alloy Composition

Carbon (C), % 0.2 to 0.25
0 to 0.030
Chromium (Cr), % 11 to 12.5
24 to 26
Iron (Fe), % 81.9 to 85.8
62.2 to 69.2
Manganese (Mn), % 0.5 to 1.0
0 to 2.0
Molybdenum (Mo), % 0.9 to 1.3
1.2 to 2.0
Nickel (Ni), % 0.5 to 1.0
5.5 to 6.5
Nitrogen (N), % 0
0.14 to 0.2
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.030
Tungsten (W), % 0.9 to 1.3
0
Vanadium (V), % 0.2 to 0.3
0