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EN 1.4303 Stainless Steel vs. ASTM A231 Spring Steel

Both EN 1.4303 stainless steel and ASTM A231 spring steel are iron alloys. They have 70% of their average alloy composition in common. There are 30 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 1.4303 stainless steel and the bottom bar is ASTM A231 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 270
540
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 13 to 49
14
Fatigue Strength, MPa 220 to 320
1000
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 420 to 540
1080
Tensile Strength: Ultimate (UTS), MPa 590 to 900
1790
Tensile Strength: Yield (Proof), MPa 230 to 560
1570

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 940
420
Melting Completion (Liquidus), °C 1420
1460
Melting Onset (Solidus), °C 1380
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
52
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 17
2.3
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.2
2.0
Embodied Energy, MJ/kg 46
28
Embodied Water, L/kg 150
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 230
230
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21 to 32
64
Strength to Weight: Bending, points 20 to 26
42
Thermal Diffusivity, mm2/s 4.0
14
Thermal Shock Resistance, points 13 to 20
53

Alloy Composition

Carbon (C), % 0 to 0.060
0.48 to 0.53
Chromium (Cr), % 17 to 19
0.8 to 1.1
Iron (Fe), % 64.8 to 72
96.7 to 97.7
Manganese (Mn), % 0 to 2.0
0.7 to 0.9
Nickel (Ni), % 11 to 13
0
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.015
0 to 0.040
Vanadium (V), % 0
0.15 to 0.3