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ASTM A387 Grade 21L Class 1 vs. ASTM A182 Grade F122

Both ASTM A387 grade 21L class 1 and ASTM A182 grade F122 are iron alloys. They have 89% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 21L class 1 and the bottom bar is ASTM A182 grade F122.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
220
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
23
Fatigue Strength, MPa 160
320
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
76
Shear Strength, MPa 310
450
Tensile Strength: Ultimate (UTS), MPa 500
710
Tensile Strength: Yield (Proof), MPa 230
450

Thermal Properties

Latent Heat of Fusion, J/g 260
270
Maximum Temperature: Mechanical, °C 480
600
Melting Completion (Liquidus), °C 1470
1490
Melting Onset (Solidus), °C 1430
1440
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
24
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
10
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
12

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
12
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 1.8
3.0
Embodied Energy, MJ/kg 23
44
Embodied Water, L/kg 62
100

Common Calculations

PREN (Pitting Resistance) 6.4
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84
140
Resilience: Unit (Modulus of Resilience), kJ/m3 140
520
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18
25
Strength to Weight: Bending, points 18
22
Thermal Diffusivity, mm2/s 11
6.4
Thermal Shock Resistance, points 14
19

Alloy Composition

Aluminum (Al), % 0
0 to 0.020
Boron (B), % 0
0 to 0.0050
Carbon (C), % 0 to 0.1
0.070 to 0.14
Chromium (Cr), % 2.8 to 3.3
10 to 11.5
Copper (Cu), % 0
0.3 to 1.7
Iron (Fe), % 94.4 to 96.1
81.3 to 87.7
Manganese (Mn), % 0.3 to 0.6
0 to 0.7
Molybdenum (Mo), % 0.9 to 1.1
0.25 to 0.6
Nickel (Ni), % 0
0 to 0.5
Niobium (Nb), % 0
0.040 to 0.1
Nitrogen (N), % 0
0.040 to 0.1
Phosphorus (P), % 0 to 0.025
0 to 0.020
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.025
0 to 0.010
Titanium (Ti), % 0
0 to 0.010
Tungsten (W), % 0
1.5 to 2.5
Vanadium (V), % 0
0.15 to 0.3
Zirconium (Zr), % 0
0 to 0.010