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ASTM A227 Spring Steel vs. EN 1.6570 Steel

Both ASTM A227 spring steel and EN 1.6570 steel are iron alloys. They have a very high 96% of their average alloy composition in common. There are 29 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 A227 spring steel and the bottom bar is EN 1.6570 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 500 to 640
270 to 340
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12
11 to 17
Fatigue Strength, MPa 900 to 1160
500 to 660
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
73
Tensile Strength: Ultimate (UTS), MPa 1720 to 2220
910 to 1130
Tensile Strength: Yield (Proof), MPa 1430 to 1850
760 to 1060

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
440
Melting Completion (Liquidus), °C 1450
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 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
3.9
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.4
1.7
Embodied Energy, MJ/kg 19
23
Embodied Water, L/kg 46
56

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 260
120 to 140
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 61 to 79
32 to 40
Strength to Weight: Bending, points 41 to 48
27 to 31
Thermal Diffusivity, mm2/s 14
11
Thermal Shock Resistance, points 55 to 71
27 to 33

Alloy Composition

Carbon (C), % 0.45 to 0.85
0.28 to 0.35
Chromium (Cr), % 0
1.0 to 1.4
Iron (Fe), % 97.4 to 99.1
94 to 96.2
Manganese (Mn), % 0.3 to 1.3
0.6 to 1.0
Molybdenum (Mo), % 0
0.3 to 0.5
Nickel (Ni), % 0
1.6 to 2.1
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0.15 to 0.35
0 to 0.6
Sulfur (S), % 0 to 0.050
0 to 0.015

Comparable Variants