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ASTM A227 Spring Steel vs. C77400 Nickel Silver

ASTM A227 spring steel belongs to the iron alloys classification, while C77400 nickel silver belongs to the copper alloys. There are 26 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is ASTM A227 spring steel and the bottom bar is C77400 nickel silver.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 12
25
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 72
42
Shear Strength, MPa 1030 to 1330
360
Tensile Strength: Ultimate (UTS), MPa 1720 to 2220
570
Tensile Strength: Yield (Proof), MPa 1430 to 1850
250

Thermal Properties

Latent Heat of Fusion, J/g 250
170
Maximum Temperature: Mechanical, °C 400
130
Melting Completion (Liquidus), °C 1450
810
Melting Onset (Solidus), °C 1410
770
Specific Heat Capacity, J/kg-K 470
390
Thermal Expansion, µm/m-K 12
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
27
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
31

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
25
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.4
3.5
Embodied Energy, MJ/kg 19
57
Embodied Water, L/kg 46
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 260
120
Stiffness to Weight: Axial, points 13
7.7
Stiffness to Weight: Bending, points 24
20
Strength to Weight: Axial, points 61 to 79
20
Strength to Weight: Bending, points 41 to 48
19
Thermal Shock Resistance, points 55 to 71
18

Alloy Composition

Carbon (C), % 0.45 to 0.85
0
Copper (Cu), % 0
43 to 47
Iron (Fe), % 97.4 to 99.1
0
Lead (Pb), % 0
0 to 0.2
Manganese (Mn), % 0.3 to 1.3
0
Nickel (Ni), % 0
9.0 to 11
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0.15 to 0.35
0
Sulfur (S), % 0 to 0.050
0
Zinc (Zn), % 0
41.3 to 48
Residuals, % 0
0 to 0.5