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ASTM A387 Grade 91 Class 2 vs. Type 2 Pewter

ASTM A387 grade 91 class 2 belongs to the iron alloys classification, while Type 2 pewter belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 91 class 2 and the bottom bar is Type 2 pewter.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
13 to 23
Elastic (Young's, Tensile) Modulus, GPa 190
52
Poisson's Ratio 0.28
0.35
Shear Modulus, GPa 75
19
Tensile Strength: Ultimate (UTS), MPa 670
52 to 68

Thermal Properties

Latent Heat of Fusion, J/g 270
69
Melting Completion (Liquidus), °C 1460
300
Melting Onset (Solidus), °C 1420
240
Specific Heat Capacity, J/kg-K 470
220
Thermal Expansion, µm/m-K 13
21

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
75
Density, g/cm3 7.8
7.3
Embodied Carbon, kg CO2/kg material 2.6
12
Embodied Energy, MJ/kg 37
210
Embodied Water, L/kg 88
1220

Common Calculations

Stiffness to Weight: Axial, points 14
3.9
Stiffness to Weight: Bending, points 25
17
Strength to Weight: Axial, points 24
2.0 to 2.6
Strength to Weight: Bending, points 22
4.3 to 5.1
Thermal Shock Resistance, points 19
3.4 to 4.4

Alloy Composition

Aluminum (Al), % 0 to 0.020
0
Antimony (Sb), % 0
5.0 to 7.5
Arsenic (As), % 0
0 to 0.050
Carbon (C), % 0.080 to 0.12
0
Chromium (Cr), % 8.0 to 9.5
0
Copper (Cu), % 0
1.5 to 3.0
Iron (Fe), % 87.3 to 90.3
0 to 0.015
Lead (Pb), % 0
0 to 0.050
Manganese (Mn), % 0.3 to 0.6
0
Molybdenum (Mo), % 0.85 to 1.1
0
Nickel (Ni), % 0 to 0.4
0
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0.2 to 0.5
0
Sulfur (S), % 0 to 0.010
0
Tin (Sn), % 0
90 to 93
Titanium (Ti), % 0 to 0.010
0
Vanadium (V), % 0.18 to 0.25
0
Zinc (Zn), % 0
0 to 0.0050
Zirconium (Zr), % 0 to 0.010
0