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ASTM A227 Spring Steel vs. EN 1.7102 Steel

Both ASTM A227 spring steel and EN 1.7102 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 25 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 ASTM A227 spring steel and the bottom bar is EN 1.7102 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 500 to 640
200 to 480
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
72
Tensile Strength: Ultimate (UTS), MPa 1720 to 2220
670 to 2010

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 400
410
Melting Completion (Liquidus), °C 1450
1440
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 52
47
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
2.2
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.4
1.5
Embodied Energy, MJ/kg 19
20
Embodied Water, L/kg 46
48

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 61 to 79
24 to 72
Strength to Weight: Bending, points 41 to 48
22 to 46
Thermal Diffusivity, mm2/s 14
13
Thermal Shock Resistance, points 55 to 71
20 to 60

Alloy Composition

Carbon (C), % 0.45 to 0.85
0.51 to 0.59
Chromium (Cr), % 0
0.5 to 0.8
Iron (Fe), % 97.4 to 99.1
96.2 to 97.3
Manganese (Mn), % 0.3 to 1.3
0.5 to 0.8
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0.15 to 0.35
1.2 to 1.6
Sulfur (S), % 0 to 0.050
0 to 0.025

Comparable Variants