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ASTM A232 Spring Steel vs. S30415 Stainless Steel

Both ASTM A232 spring steel and S30415 stainless steel are iron alloys. They have 71% 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 ASTM A232 spring steel and the bottom bar is S30415 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 540
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 14
45
Fatigue Strength, MPa 1040
300
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 1090
470
Tensile Strength: Ultimate (UTS), MPa 1790
670
Tensile Strength: Yield (Proof), MPa 1610
330

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 420
940
Melting Completion (Liquidus), °C 1460
1410
Melting Onset (Solidus), °C 1410
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 52
21
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
15
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.0
3.1
Embodied Energy, MJ/kg 28
43
Embodied Water, L/kg 51
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
250
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 64
24
Strength to Weight: Bending, points 42
22
Thermal Diffusivity, mm2/s 14
5.6
Thermal Shock Resistance, points 53
15

Alloy Composition

Carbon (C), % 0.48 to 0.53
0.040 to 0.060
Cerium (Ce), % 0
0.030 to 0.080
Chromium (Cr), % 0.8 to 1.1
18 to 19
Iron (Fe), % 96.8 to 97.7
67.8 to 71.8
Manganese (Mn), % 0.7 to 0.9
0 to 0.8
Nickel (Ni), % 0
9.0 to 10
Nitrogen (N), % 0
0.12 to 0.18
Phosphorus (P), % 0 to 0.020
0 to 0.045
Silicon (Si), % 0.15 to 0.35
1.0 to 2.0
Sulfur (S), % 0 to 0.035
0 to 0.030
Vanadium (V), % 0.15 to 0.3
0