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AISI 317L Stainless Steel vs. ASTM A231 Spring Steel

Both AISI 317L stainless steel and ASTM A231 spring steel are iron alloys. They have 65% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is AISI 317L stainless steel and the bottom bar is ASTM A231 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
540
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 44
14
Fatigue Strength, MPa 220
1000
Poisson's Ratio 0.28
0.29
Reduction in Area, % 56
46
Shear Modulus, GPa 82
73
Shear Strength, MPa 380
1080
Tensile Strength: Ultimate (UTS), MPa 550
1790
Tensile Strength: Yield (Proof), MPa 250
1570

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 1010
420
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1380
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 14
52
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 21
2.3
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 4.3
2.0
Embodied Energy, MJ/kg 59
28
Embodied Water, L/kg 160
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
230
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 19
64
Strength to Weight: Bending, points 19
42
Thermal Diffusivity, mm2/s 3.8
14
Thermal Shock Resistance, points 12
53

Alloy Composition

Carbon (C), % 0 to 0.030
0.48 to 0.53
Chromium (Cr), % 18 to 20
0.8 to 1.1
Iron (Fe), % 58 to 68
96.7 to 97.7
Manganese (Mn), % 0 to 2.0
0.7 to 0.9
Molybdenum (Mo), % 3.0 to 4.0
0
Nickel (Ni), % 11 to 15
0
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.040
Vanadium (V), % 0
0.15 to 0.3