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ASTM A227 Spring Steel vs. EN 1.1170 Steel

Both ASTM A227 spring steel and EN 1.1170 steel are iron alloys. They have a very high 99% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 1.1170 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 500 to 640
180 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12
16 to 17
Fatigue Strength, MPa 900 to 1160
220 to 330
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
73
Shear Strength, MPa 1030 to 1330
390 to 450
Tensile Strength: Ultimate (UTS), MPa 1720 to 2220
640 to 730
Tensile Strength: Yield (Proof), MPa 1430 to 1850
330 to 500

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
400
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
50
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.5
Embodied Energy, MJ/kg 19
19
Embodied Water, L/kg 46
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 260
91 to 100
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 61 to 79
23 to 26
Strength to Weight: Bending, points 41 to 48
21 to 23
Thermal Diffusivity, mm2/s 14
13
Thermal Shock Resistance, points 55 to 71
20 to 23

Alloy Composition

Carbon (C), % 0.45 to 0.85
0.25 to 0.32
Chromium (Cr), % 0
0 to 0.4
Iron (Fe), % 97.4 to 99.1
96.7 to 98.5
Manganese (Mn), % 0.3 to 1.3
1.3 to 1.7
Molybdenum (Mo), % 0
0 to 0.1
Nickel (Ni), % 0
0 to 0.4
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0.15 to 0.35
0 to 0.4
Sulfur (S), % 0 to 0.050
0 to 0.035

Comparable Variants