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ASTM A182 Grade F12 Class 1 vs. ASTM A182 Grade F5

Both ASTM A182 grade F12 class 1 and ASTM A182 grade F5 are iron alloys. Both are furnished in the annealed condition. They have a very high 96% of their average alloy composition in common.

For each property being compared, the top bar is ASTM A182 grade F12 class 1 and the bottom bar is ASTM A182 grade F5.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 23
22
Fatigue Strength, MPa 180
220
Poisson's Ratio 0.29
0.29
Reduction in Area, % 50
40
Shear Modulus, GPa 73
74
Shear Strength, MPa 300
340
Tensile Strength: Ultimate (UTS), MPa 470
540
Tensile Strength: Yield (Proof), MPa 250
310

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Maximum Temperature: Mechanical, °C 430
510
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 45
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
8.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
9.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
4.5
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.6
1.8
Embodied Energy, MJ/kg 21
24
Embodied Water, L/kg 52
69

Common Calculations

PREN (Pitting Resistance) 2.8
6.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 91
100
Resilience: Unit (Modulus of Resilience), kJ/m3 160
260
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17
19
Strength to Weight: Bending, points 17
19
Thermal Diffusivity, mm2/s 12
11
Thermal Shock Resistance, points 14
15

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.15
Chromium (Cr), % 0.8 to 1.3
4.0 to 6.0
Iron (Fe), % 96.8 to 98.4
91.5 to 95.3
Manganese (Mn), % 0.3 to 0.6
0.3 to 0.6
Molybdenum (Mo), % 0.44 to 0.65
0.44 to 0.65
Nickel (Ni), % 0
0 to 0.5
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.045
0 to 0.030