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ASTM A182 Grade F11 Class 2 vs. ASTM A182 Grade F12 Class 2

Both ASTM A182 grade F11 class 2 and ASTM A182 grade F12 class 2 are iron alloys. Both are furnished in the annealed condition. Their average alloy composition is basically identical.

For each property being compared, the top bar is ASTM A182 grade F11 class 2 and the bottom bar is ASTM A182 grade F12 class 2.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 22
22
Fatigue Strength, MPa 220
220
Poisson's Ratio 0.29
0.29
Reduction in Area, % 34
34
Shear Modulus, GPa 73
73
Shear Strength, MPa 340
340
Tensile Strength: Ultimate (UTS), MPa 540
540
Tensile Strength: Yield (Proof), MPa 310
310

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 430
430
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
43
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
2.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.6
1.6
Embodied Energy, MJ/kg 21
21
Embodied Water, L/kg 53
52

Common Calculations

PREN (Pitting Resistance) 3.0
2.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
100
Resilience: Unit (Modulus of Resilience), kJ/m3 260
260
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19
19
Strength to Weight: Bending, points 19
19
Thermal Diffusivity, mm2/s 11
12
Thermal Shock Resistance, points 16
16

Alloy Composition

Carbon (C), % 0.1 to 0.2
0.1 to 0.2
Chromium (Cr), % 1.0 to 1.5
0.8 to 1.3
Iron (Fe), % 95.8 to 97.7
96.4 to 98.3
Manganese (Mn), % 0.3 to 0.8
0.3 to 0.8
Molybdenum (Mo), % 0.44 to 0.65
0.44 to 0.65
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0.5 to 1.0
0.1 to 0.6
Sulfur (S), % 0 to 0.040
0 to 0.040