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ASTM A387 Grade 2 Class 1 vs. Annealed SAE-AISI H43

Both ASTM A387 grade 2 class 1 and annealed SAE-AISI H43 are iron alloys. Both are furnished in the annealed condition. They have 86% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 2 class 1 and the bottom bar is annealed SAE-AISI H43.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
210
Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
77
Tensile Strength: Ultimate (UTS), MPa 470
710

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Melting Completion (Liquidus), °C 1470
1530
Melting Onset (Solidus), °C 1420
1480
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 45
30
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
14
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.6
8.2
Embodied Energy, MJ/kg 20
120
Embodied Water, L/kg 50
100

Common Calculations

PREN (Pitting Resistance) 2.4
31
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 16
25
Strength to Weight: Bending, points 17
22
Thermal Diffusivity, mm2/s 12
8.3
Thermal Shock Resistance, points 14
21

Alloy Composition

Carbon (C), % 0.050 to 0.21
0.5 to 0.65
Chromium (Cr), % 0.5 to 0.8
3.8 to 4.5
Iron (Fe), % 97.1 to 98.3
83.2 to 85.9
Manganese (Mn), % 0.55 to 0.8
0.15 to 0.4
Molybdenum (Mo), % 0.45 to 0.6
7.8 to 8.5
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0.15 to 0.4
0.2 to 0.45
Sulfur (S), % 0 to 0.025
0 to 0.030
Vanadium (V), % 0
1.8 to 2.2