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ACI-ASTM CE8MN Steel vs. ASTM A227 Spring Steel

Both ACI-ASTM CE8MN steel and ASTM A227 spring steel are iron alloys. They have 62% of their average alloy composition in common. There are 28 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 ACI-ASTM CE8MN steel and the bottom bar is ASTM A227 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 29
12
Fatigue Strength, MPa 370
900 to 1160
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 80
72
Tensile Strength: Ultimate (UTS), MPa 750
1720 to 2220
Tensile Strength: Yield (Proof), MPa 500
1430 to 1850

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
400
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
52
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 21
1.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.2
1.4
Embodied Energy, MJ/kg 58
19
Embodied Water, L/kg 180
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
200 to 260
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 27
61 to 79
Strength to Weight: Bending, points 23
41 to 48
Thermal Diffusivity, mm2/s 4.2
14
Thermal Shock Resistance, points 21
55 to 71

Alloy Composition

Carbon (C), % 0 to 0.080
0.45 to 0.85
Chromium (Cr), % 22.5 to 25.5
0
Iron (Fe), % 56 to 66.4
97.4 to 99.1
Manganese (Mn), % 0 to 1.0
0.3 to 1.3
Molybdenum (Mo), % 3.0 to 4.5
0
Nickel (Ni), % 8.0 to 11
0
Nitrogen (N), % 0.1 to 0.3
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.5
0.15 to 0.35
Sulfur (S), % 0 to 0.040
0 to 0.050