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EN 1.4903 Stainless Steel vs. ASTM A227 Spring Steel

Both EN 1.4903 stainless steel and ASTM A227 spring steel are iron alloys. They have 90% 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 EN 1.4903 stainless steel and the bottom bar is ASTM A227 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20 to 21
12
Fatigue Strength, MPa 320 to 330
900 to 1160
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
72
Shear Strength, MPa 420
1030 to 1330
Tensile Strength: Ultimate (UTS), MPa 670 to 680
1720 to 2220
Tensile Strength: Yield (Proof), MPa 500
1430 to 1850

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 650
400
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 26
52
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 4.0
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
1.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.6
1.4
Embodied Energy, MJ/kg 36
19
Embodied Water, L/kg 88
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
200 to 260
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24
61 to 79
Strength to Weight: Bending, points 22
41 to 48
Thermal Diffusivity, mm2/s 7.0
14
Thermal Shock Resistance, points 23
55 to 71

Alloy Composition

Aluminum (Al), % 0 to 0.040
0
Carbon (C), % 0.080 to 0.12
0.45 to 0.85
Chromium (Cr), % 8.0 to 9.5
0
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 87.1 to 90.5
97.4 to 99.1
Manganese (Mn), % 0.3 to 0.6
0.3 to 1.3
Molybdenum (Mo), % 0.85 to 1.1
0
Nickel (Ni), % 0 to 0.4
0
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.5
0.15 to 0.35
Sulfur (S), % 0 to 0.015
0 to 0.050
Vanadium (V), % 0.18 to 0.25
0

Comparable Variants