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ASTM A232 Spring Steel vs. EN 1.4935 Stainless Steel

Both ASTM A232 spring steel and EN 1.4935 stainless steel are iron alloys. They have 87% of their average alloy composition in common. There are 29 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 EN 1.4935 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 14
16 to 18
Fatigue Strength, MPa 1040
350 to 400
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Shear Strength, MPa 1090
480 to 540
Tensile Strength: Ultimate (UTS), MPa 1790
780 to 880
Tensile Strength: Yield (Proof), MPa 1610
570 to 670

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 420
740
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 52
24
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
9.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.0
2.9
Embodied Energy, MJ/kg 28
42
Embodied Water, L/kg 51
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
130
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 64
28 to 31
Strength to Weight: Bending, points 42
24 to 26
Thermal Diffusivity, mm2/s 14
6.5
Thermal Shock Resistance, points 53
27 to 30

Alloy Composition

Carbon (C), % 0.48 to 0.53
0.17 to 0.24
Chromium (Cr), % 0.8 to 1.1
11 to 12.5
Iron (Fe), % 96.8 to 97.7
83 to 86.7
Manganese (Mn), % 0.7 to 0.9
0.3 to 0.8
Molybdenum (Mo), % 0
0.8 to 1.2
Nickel (Ni), % 0
0.3 to 0.8
Phosphorus (P), % 0 to 0.020
0 to 0.025
Silicon (Si), % 0.15 to 0.35
0.1 to 0.5
Sulfur (S), % 0 to 0.035
0 to 0.015
Tungsten (W), % 0
0.4 to 0.6
Vanadium (V), % 0.15 to 0.3
0.2 to 0.35