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ASTM A229 Spring Steel vs. EN 1.4935 Stainless Steel

Both ASTM A229 spring steel and EN 1.4935 stainless steel are iron alloys. They have 86% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 1.4935 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 710 to 790
350 to 400
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
76
Shear Strength, MPa 1020 to 1140
480 to 540
Tensile Strength: Ultimate (UTS), MPa 1690 to 1890
780 to 880
Tensile Strength: Yield (Proof), MPa 1100 to 1230
570 to 670

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 400
740
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 50
24
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
9.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
2.9
Embodied Energy, MJ/kg 19
42
Embodied Water, L/kg 46
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 230
130
Resilience: Unit (Modulus of Resilience), kJ/m3 3260 to 4080
830 to 1160
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 60 to 67
28 to 31
Strength to Weight: Bending, points 40 to 43
24 to 26
Thermal Diffusivity, mm2/s 14
6.5
Thermal Shock Resistance, points 54 to 60
27 to 30

Alloy Composition

Carbon (C), % 0.55 to 0.85
0.17 to 0.24
Chromium (Cr), % 0
11 to 12.5
Iron (Fe), % 97.5 to 99
83 to 86.7
Manganese (Mn), % 0.3 to 1.2
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 0.040
0 to 0.025
Silicon (Si), % 0.15 to 0.35
0.1 to 0.5
Sulfur (S), % 0 to 0.050
0 to 0.015
Tungsten (W), % 0
0.4 to 0.6
Vanadium (V), % 0
0.2 to 0.35