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Type 2 Pewter vs. ASTM A227 Spring Steel

Type 2 pewter belongs to the otherwise unclassified metals classification, while ASTM A227 spring steel belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is Type 2 pewter and the bottom bar is ASTM A227 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 13 to 23
500 to 640
Elastic (Young's, Tensile) Modulus, GPa 52
190
Poisson's Ratio 0.35
0.29
Shear Modulus, GPa 19
72
Tensile Strength: Ultimate (UTS), MPa 52 to 68
1720 to 2220

Thermal Properties

Latent Heat of Fusion, J/g 69
250
Melting Completion (Liquidus), °C 300
1450
Melting Onset (Solidus), °C 240
1410
Specific Heat Capacity, J/kg-K 220
470
Thermal Expansion, µm/m-K 21
12

Otherwise Unclassified Properties

Base Metal Price, % relative 75
1.8
Density, g/cm3 7.3
7.8
Embodied Carbon, kg CO2/kg material 12
1.4
Embodied Energy, MJ/kg 210
19
Embodied Water, L/kg 1220
46

Common Calculations

Stiffness to Weight: Axial, points 3.9
13
Stiffness to Weight: Bending, points 17
24
Strength to Weight: Axial, points 2.0 to 2.6
61 to 79
Strength to Weight: Bending, points 4.3 to 5.1
41 to 48
Thermal Shock Resistance, points 3.4 to 4.4
55 to 71

Alloy Composition

Antimony (Sb), % 5.0 to 7.5
0
Arsenic (As), % 0 to 0.050
0
Carbon (C), % 0
0.45 to 0.85
Copper (Cu), % 1.5 to 3.0
0
Iron (Fe), % 0 to 0.015
97.4 to 99.1
Lead (Pb), % 0 to 0.050
0
Manganese (Mn), % 0
0.3 to 1.3
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0.15 to 0.35
Sulfur (S), % 0
0 to 0.050
Tin (Sn), % 90 to 93
0
Zinc (Zn), % 0 to 0.0050
0