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EN 1.4971 Stainless Steel vs. ASTM A229 Spring Steel

Both EN 1.4971 stainless steel and ASTM A229 spring steel are iron alloys. They have a modest 32% of their average alloy composition in common, which, by itself, doesn't mean much. There are 29 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 EN 1.4971 stainless steel and the bottom bar is ASTM A229 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
490 to 550
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 34
14
Fatigue Strength, MPa 270
710 to 790
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
72
Shear Strength, MPa 530
1020 to 1140
Tensile Strength: Ultimate (UTS), MPa 800
1690 to 1890
Tensile Strength: Yield (Proof), MPa 340
1100 to 1230

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
400
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1410
1410
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 13
50
Thermal Expansion, µm/m-K 15
12

Otherwise Unclassified Properties

Base Metal Price, % relative 70
1.8
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 7.6
1.4
Embodied Energy, MJ/kg 110
19
Embodied Water, L/kg 300
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
200 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 280
3260 to 4080
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 26
60 to 67
Strength to Weight: Bending, points 23
40 to 43
Thermal Diffusivity, mm2/s 3.4
14
Thermal Shock Resistance, points 19
54 to 60

Alloy Composition

Carbon (C), % 0.080 to 0.16
0.55 to 0.85
Chromium (Cr), % 20 to 22.5
0
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 37.1
97.5 to 99
Manganese (Mn), % 0 to 2.0
0.3 to 1.2
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
0
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0.1 to 0.2
0
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.015
0 to 0.050
Tungsten (W), % 2.0 to 3.0
0