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S32950 Stainless Steel vs. ASTM A232 Spring Steel

Both S32950 stainless steel and ASTM A232 spring steel are iron alloys. They have 67% 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 S32950 stainless steel and the bottom bar is ASTM A232 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
540
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
14
Fatigue Strength, MPa 330
1040
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 80
73
Shear Strength, MPa 480
1090
Tensile Strength: Ultimate (UTS), MPa 780
1790
Tensile Strength: Yield (Proof), MPa 550
1610

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
420
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1390
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
52
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 17
2.3
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.4
2.0
Embodied Energy, MJ/kg 47
28
Embodied Water, L/kg 180
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
250
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28
64
Strength to Weight: Bending, points 24
42
Thermal Diffusivity, mm2/s 4.3
14
Thermal Shock Resistance, points 21
53

Alloy Composition

Carbon (C), % 0 to 0.030
0.48 to 0.53
Chromium (Cr), % 26 to 29
0.8 to 1.1
Iron (Fe), % 60.3 to 69.4
96.8 to 97.7
Manganese (Mn), % 0 to 2.0
0.7 to 0.9
Molybdenum (Mo), % 1.0 to 2.5
0
Nickel (Ni), % 3.5 to 5.2
0
Nitrogen (N), % 0.15 to 0.35
0
Phosphorus (P), % 0 to 0.035
0 to 0.020
Silicon (Si), % 0 to 0.6
0.15 to 0.35
Sulfur (S), % 0 to 0.010
0 to 0.035
Vanadium (V), % 0
0.15 to 0.3