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ASTM A229 Spring Steel vs. EN 1.4587 Stainless Steel

Both ASTM A229 spring steel and EN 1.4587 stainless steel are iron alloys. They have a modest 38% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 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 ASTM A229 spring steel and the bottom bar is EN 1.4587 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 490 to 550
160
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 14
34
Fatigue Strength, MPa 710 to 790
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
80
Tensile Strength: Ultimate (UTS), MPa 1690 to 1890
540
Tensile Strength: Yield (Proof), MPa 1100 to 1230
250

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Maximum Temperature: Mechanical, °C 400
1100
Melting Completion (Liquidus), °C 1450
1420
Melting Onset (Solidus), °C 1410
1370
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 50
17
Thermal Expansion, µm/m-K 12
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
36
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 1.4
6.3
Embodied Energy, MJ/kg 19
87
Embodied Water, L/kg 46
230

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 230
150
Resilience: Unit (Modulus of Resilience), kJ/m3 3260 to 4080
150
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 60 to 67
18
Strength to Weight: Bending, points 40 to 43
18
Thermal Diffusivity, mm2/s 14
4.5
Thermal Shock Resistance, points 54 to 60
13

Alloy Composition

Carbon (C), % 0.55 to 0.85
0 to 0.030
Chromium (Cr), % 0
24 to 26
Copper (Cu), % 0
2.0 to 3.0
Iron (Fe), % 97.5 to 99
32.7 to 41.9
Manganese (Mn), % 0.3 to 1.2
0 to 2.0
Molybdenum (Mo), % 0
4.0 to 5.0
Nickel (Ni), % 0
28 to 30
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.050
0 to 0.025