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ASTM A231 Spring Steel vs. EN 1.4029 Stainless Steel

Both ASTM A231 spring steel and EN 1.4029 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 A231 spring steel and the bottom bar is EN 1.4029 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 14
10 to 20
Fatigue Strength, MPa 1000
270 to 400
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Shear Strength, MPa 1080
440 to 550
Tensile Strength: Ultimate (UTS), MPa 1790
700 to 930
Tensile Strength: Yield (Proof), MPa 1570
410 to 740

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 420
750
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 52
30
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
3.7

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
7.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.0
2.0
Embodied Energy, MJ/kg 28
28
Embodied Water, L/kg 51
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
89 to 120
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 64
25 to 33
Strength to Weight: Bending, points 42
23 to 27
Thermal Diffusivity, mm2/s 14
8.1
Thermal Shock Resistance, points 53
26 to 34

Alloy Composition

Carbon (C), % 0.48 to 0.53
0.25 to 0.32
Chromium (Cr), % 0.8 to 1.1
12 to 13.5
Iron (Fe), % 96.7 to 97.7
82.8 to 87.6
Manganese (Mn), % 0.7 to 0.9
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.6
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.040
0.15 to 0.25
Vanadium (V), % 0.15 to 0.3
0