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ASTM A227 Spring Steel vs. ACI-ASTM CF10SMnN Steel

Both ASTM A227 spring steel and ACI-ASTM CF10SMnN steel are iron alloys. They have 63% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is ASTM A227 spring steel and the bottom bar is ACI-ASTM CF10SMnN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 500 to 640
190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12
34
Fatigue Strength, MPa 900 to 1160
260
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
75
Tensile Strength: Ultimate (UTS), MPa 1720 to 2220
660
Tensile Strength: Yield (Proof), MPa 1430 to 1850
330

Thermal Properties

Latent Heat of Fusion, J/g 250
340
Maximum Temperature: Mechanical, °C 400
900
Melting Completion (Liquidus), °C 1450
1360
Melting Onset (Solidus), °C 1410
1310
Specific Heat Capacity, J/kg-K 470
500
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
15
Density, g/cm3 7.8
7.5
Embodied Carbon, kg CO2/kg material 1.4
3.1
Embodied Energy, MJ/kg 19
45
Embodied Water, L/kg 46
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 260
180
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
26
Strength to Weight: Axial, points 61 to 79
24
Strength to Weight: Bending, points 41 to 48
22
Thermal Shock Resistance, points 55 to 71
15

Alloy Composition

Carbon (C), % 0.45 to 0.85
0 to 0.1
Chromium (Cr), % 0
16 to 18
Iron (Fe), % 97.4 to 99.1
59.1 to 65.4
Manganese (Mn), % 0.3 to 1.3
7.0 to 9.0
Nickel (Ni), % 0
8.0 to 9.0
Nitrogen (N), % 0
0.080 to 0.18
Phosphorus (P), % 0 to 0.040
0 to 0.060
Silicon (Si), % 0.15 to 0.35
3.5 to 4.5
Sulfur (S), % 0 to 0.050
0 to 0.030