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S38815 Stainless Steel vs. ASTM A231 Spring Steel

Both S38815 stainless steel and ASTM A231 spring steel are iron alloys. They have 64% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is S38815 stainless steel and the bottom bar is ASTM A231 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
540
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 34
14
Fatigue Strength, MPa 230
1000
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
73
Shear Strength, MPa 410
1080
Tensile Strength: Ultimate (UTS), MPa 610
1790
Tensile Strength: Yield (Proof), MPa 290
1570

Thermal Properties

Latent Heat of Fusion, J/g 370
250
Maximum Temperature: Mechanical, °C 860
420
Melting Completion (Liquidus), °C 1360
1460
Melting Onset (Solidus), °C 1310
1410
Specific Heat Capacity, J/kg-K 500
470
Thermal Expansion, µm/m-K 15
13

Otherwise Unclassified Properties

Base Metal Price, % relative 19
2.3
Density, g/cm3 7.5
7.8
Embodied Carbon, kg CO2/kg material 3.8
2.0
Embodied Energy, MJ/kg 54
28
Embodied Water, L/kg 140
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
230
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 22
64
Strength to Weight: Bending, points 21
42
Thermal Shock Resistance, points 15
53

Alloy Composition

Aluminum (Al), % 0 to 0.3
0
Carbon (C), % 0 to 0.030
0.48 to 0.53
Chromium (Cr), % 13 to 15
0.8 to 1.1
Copper (Cu), % 0.75 to 1.5
0
Iron (Fe), % 56.1 to 67
96.7 to 97.7
Manganese (Mn), % 0 to 2.0
0.7 to 0.9
Molybdenum (Mo), % 0.75 to 1.5
0
Nickel (Ni), % 13 to 17
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 5.5 to 6.5
0.15 to 0.35
Sulfur (S), % 0 to 0.020
0 to 0.040
Vanadium (V), % 0
0.15 to 0.3