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ASTM A231 Spring Steel vs. EN 1.4911 Stainless Steel

Both ASTM A231 spring steel and EN 1.4911 stainless steel are iron alloys. Both are furnished in the quenched and tempered condition. They have 82% 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 A231 spring steel and the bottom bar is EN 1.4911 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 14
11
Fatigue Strength, MPa 1000
530
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Shear Strength, MPa 1080
640
Tensile Strength: Ultimate (UTS), MPa 1790
1070
Tensile Strength: Yield (Proof), MPa 1570
970

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 420
700
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1410
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 52
20
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
20
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.0
3.4
Embodied Energy, MJ/kg 28
49
Embodied Water, L/kg 51
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
120
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 64
38
Strength to Weight: Bending, points 42
30
Thermal Diffusivity, mm2/s 14
5.4
Thermal Shock Resistance, points 53
37

Alloy Composition

Boron (B), % 0
0.0050 to 0.015
Carbon (C), % 0.48 to 0.53
0.050 to 0.12
Chromium (Cr), % 0.8 to 1.1
9.8 to 11.2
Cobalt (Co), % 0
5.0 to 7.0
Iron (Fe), % 96.7 to 97.7
75.7 to 83.8
Manganese (Mn), % 0.7 to 0.9
0.3 to 1.3
Molybdenum (Mo), % 0
0.5 to 1.0
Nickel (Ni), % 0
0.2 to 1.2
Niobium (Nb), % 0
0.2 to 0.5
Nitrogen (N), % 0
0 to 0.035
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0.15 to 0.35
0.1 to 0.8
Sulfur (S), % 0 to 0.040
0 to 0.015
Tungsten (W), % 0
0 to 0.7
Vanadium (V), % 0.15 to 0.3
0.1 to 0.4