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AISI 422 Stainless Steel vs. ASTM A227 Spring Steel

Both AISI 422 stainless steel and ASTM A227 spring steel are iron alloys. They have 85% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is AISI 422 stainless steel and the bottom bar is ASTM A227 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260 to 330
500 to 640
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 15 to 17
12
Fatigue Strength, MPa 410 to 500
900 to 1160
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
72
Shear Strength, MPa 560 to 660
1030 to 1330
Tensile Strength: Ultimate (UTS), MPa 910 to 1080
1720 to 2220
Tensile Strength: Yield (Proof), MPa 670 to 870
1430 to 1850

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 650
400
Melting Completion (Liquidus), °C 1480
1450
Melting Onset (Solidus), °C 1470
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 24
52
Thermal Expansion, µm/m-K 10
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 4.7
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 5.3
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 11
1.8
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 3.1
1.4
Embodied Energy, MJ/kg 44
19
Embodied Water, L/kg 100
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 150
200 to 260
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 32 to 38
61 to 79
Strength to Weight: Bending, points 26 to 30
41 to 48
Thermal Diffusivity, mm2/s 6.4
14
Thermal Shock Resistance, points 33 to 39
55 to 71

Alloy Composition

Carbon (C), % 0.2 to 0.25
0.45 to 0.85
Chromium (Cr), % 11 to 12.5
0
Iron (Fe), % 81.9 to 85.8
97.4 to 99.1
Manganese (Mn), % 0.5 to 1.0
0.3 to 1.3
Molybdenum (Mo), % 0.9 to 1.3
0
Nickel (Ni), % 0.5 to 1.0
0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.5
0.15 to 0.35
Sulfur (S), % 0 to 0.025
0 to 0.050
Tungsten (W), % 0.9 to 1.3
0
Vanadium (V), % 0.2 to 0.3
0

Comparable Variants