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EN 1.4029 Stainless Steel vs. ASTM A229 Spring Steel

Both EN 1.4029 stainless steel and ASTM A229 spring steel are iron alloys. They have 87% 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 EN 1.4029 stainless steel and the bottom bar is ASTM A229 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 10 to 20
14
Fatigue Strength, MPa 270 to 400
710 to 790
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
72
Shear Strength, MPa 440 to 550
1020 to 1140
Tensile Strength: Ultimate (UTS), MPa 700 to 930
1690 to 1890
Tensile Strength: Yield (Proof), MPa 410 to 740
1100 to 1230

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 750
400
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 30
50
Thermal Expansion, µm/m-K 10
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.1
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.7
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
1.8
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
1.4
Embodied Energy, MJ/kg 28
19
Embodied Water, L/kg 100
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 89 to 120
200 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 440 to 1410
3260 to 4080
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 33
60 to 67
Strength to Weight: Bending, points 23 to 27
40 to 43
Thermal Diffusivity, mm2/s 8.1
14
Thermal Shock Resistance, points 26 to 34
54 to 60

Alloy Composition

Carbon (C), % 0.25 to 0.32
0.55 to 0.85
Chromium (Cr), % 12 to 13.5
0
Iron (Fe), % 82.8 to 87.6
97.5 to 99
Manganese (Mn), % 0 to 1.5
0.3 to 1.2
Molybdenum (Mo), % 0 to 0.6
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0.15 to 0.25
0 to 0.050