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ASTM A232 Spring Steel vs. EN 1.7380 Steel

Both ASTM A232 spring steel and EN 1.7380 steel are iron alloys. They have a very high 98% 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 1.7380 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 540
160 to 170
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 14
19 to 20
Fatigue Strength, MPa 1040
200 to 230
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
74
Shear Strength, MPa 1090
330 to 350
Tensile Strength: Ultimate (UTS), MPa 1790
540 to 550
Tensile Strength: Yield (Proof), MPa 1610
290 to 330

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Maximum Temperature: Mechanical, °C 420
460
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1410
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 52
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
3.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.0
1.8
Embodied Energy, MJ/kg 28
23
Embodied Water, L/kg 51
59

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
87 to 98
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 64
19 to 20
Strength to Weight: Bending, points 42
19
Thermal Diffusivity, mm2/s 14
11
Thermal Shock Resistance, points 53
15 to 16

Alloy Composition

Carbon (C), % 0.48 to 0.53
0.080 to 0.14
Chromium (Cr), % 0.8 to 1.1
2.0 to 2.5
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 96.8 to 97.7
94.6 to 96.6
Manganese (Mn), % 0.7 to 0.9
0.4 to 0.8
Molybdenum (Mo), % 0
0.9 to 1.1
Nitrogen (N), % 0
0 to 0.012
Phosphorus (P), % 0 to 0.020
0 to 0.020
Silicon (Si), % 0.15 to 0.35
0 to 0.5
Sulfur (S), % 0 to 0.035
0 to 0.010
Vanadium (V), % 0.15 to 0.3
0