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S35140 Stainless Steel vs. ASTM A232 Spring Steel

Both S35140 stainless steel and ASTM A232 spring steel are iron alloys. They have 50% 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 S35140 stainless steel and the bottom bar is ASTM A232 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
540
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34
14
Fatigue Strength, MPa 250
1040
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
73
Shear Strength, MPa 460
1090
Tensile Strength: Ultimate (UTS), MPa 690
1790
Tensile Strength: Yield (Proof), MPa 310
1610

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
420
Melting Completion (Liquidus), °C 1420
1460
Melting Onset (Solidus), °C 1370
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 14
52
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 31
2.3
Density, g/cm3 8.0
7.8
Embodied Carbon, kg CO2/kg material 5.5
2.0
Embodied Energy, MJ/kg 78
28
Embodied Water, L/kg 190
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
250
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24
64
Strength to Weight: Bending, points 22
42
Thermal Diffusivity, mm2/s 3.7
14
Thermal Shock Resistance, points 16
53

Alloy Composition

Carbon (C), % 0 to 0.1
0.48 to 0.53
Chromium (Cr), % 20 to 22
0.8 to 1.1
Iron (Fe), % 44.1 to 52.7
96.8 to 97.7
Manganese (Mn), % 1.0 to 3.0
0.7 to 0.9
Molybdenum (Mo), % 1.0 to 2.0
0
Nickel (Ni), % 25 to 27
0
Niobium (Nb), % 0.25 to 0.75
0
Nitrogen (N), % 0.080 to 0.2
0
Phosphorus (P), % 0 to 0.045
0 to 0.020
Silicon (Si), % 0 to 0.75
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.035
Vanadium (V), % 0
0.15 to 0.3