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ASTM A232 Spring Steel vs. EN 1.7366 Steel

Both ASTM A232 spring steel and EN 1.7366 steel are iron alloys. They have a very high 95% of their average alloy composition in common. There are 30 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 ASTM A232 spring steel and the bottom bar is EN 1.7366 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 540
140 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 14
17 to 19
Fatigue Strength, MPa 1040
160 to 320
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
74
Shear Strength, MPa 1090
290 to 440
Tensile Strength: Ultimate (UTS), MPa 1790
460 to 710
Tensile Strength: Yield (Proof), MPa 1610
230 to 480

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Maximum Temperature: Mechanical, °C 420
510
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 52
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
8.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
4.3
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.0
1.7
Embodied Energy, MJ/kg 28
23
Embodied Water, L/kg 51
69

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
74 to 110
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 64
16 to 25
Strength to Weight: Bending, points 42
17 to 23
Thermal Diffusivity, mm2/s 14
11
Thermal Shock Resistance, points 53
13 to 20

Alloy Composition

Carbon (C), % 0.48 to 0.53
0 to 0.18
Chromium (Cr), % 0.8 to 1.1
4.0 to 6.0
Iron (Fe), % 96.8 to 97.7
91.9 to 95.3
Manganese (Mn), % 0.7 to 0.9
0.3 to 0.8
Molybdenum (Mo), % 0
0.45 to 0.65
Phosphorus (P), % 0 to 0.020
0 to 0.025
Silicon (Si), % 0.15 to 0.35
0 to 0.4
Sulfur (S), % 0 to 0.035
0 to 0.015
Vanadium (V), % 0.15 to 0.3
0