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EN 1.4404 Stainless Steel vs. ASTM A232 Spring Steel

Both EN 1.4404 stainless steel and ASTM A232 spring steel are iron alloys. They have 69% 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 1.4404 stainless steel and the bottom bar is ASTM A232 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, % 14 to 43
14
Fatigue Strength, MPa 220 to 320
1040
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
73
Shear Strength, MPa 420 to 550
1090
Tensile Strength: Ultimate (UTS), MPa 600 to 900
1790
Tensile Strength: Yield (Proof), MPa 240 to 570
1610

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 950
420
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 15
52
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 19
2.3
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 3.8
2.0
Embodied Energy, MJ/kg 52
28
Embodied Water, L/kg 150
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 210
250
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 0.030
0.48 to 0.53
Chromium (Cr), % 16.5 to 18.5
0.8 to 1.1
Iron (Fe), % 62.8 to 71.5
96.8 to 97.7
Manganese (Mn), % 0 to 2.0
0.7 to 0.9
Molybdenum (Mo), % 2.0 to 2.5
0
Nickel (Ni), % 10 to 13
0
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.020
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.015
0 to 0.035
Vanadium (V), % 0
0.15 to 0.3