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SAE-AISI 1212 Steel vs. SAE-AISI 1078 Steel

Both SAE-AISI 1212 steel and SAE-AISI 1078 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is SAE-AISI 1212 steel and the bottom bar is SAE-AISI 1078 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 180
220 to 230
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 28
11 to 14
Fatigue Strength, MPa 200 to 290
270 to 350
Poisson's Ratio 0.29
0.29
Reduction in Area, % 39 to 51
34 to 45
Shear Modulus, GPa 73
72
Shear Strength, MPa 280 to 370
440 to 470
Tensile Strength: Ultimate (UTS), MPa 440 to 620
730 to 780
Tensile Strength: Yield (Proof), MPa 260 to 460
430 to 570

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
400
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 52
49
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
1.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.4
Embodied Energy, MJ/kg 18
18
Embodied Water, L/kg 46
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 64 to 110
77 to 90
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 560
490 to 860
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 15 to 22
26 to 28
Strength to Weight: Bending, points 16 to 20
23 to 24
Thermal Diffusivity, mm2/s 14
13
Thermal Shock Resistance, points 14 to 20
25 to 26

Alloy Composition

Carbon (C), % 0 to 0.13
0.72 to 0.85
Iron (Fe), % 98.5 to 99.07
98.5 to 99
Manganese (Mn), % 0.7 to 1.0
0.3 to 0.6
Phosphorus (P), % 0.070 to 0.12
0 to 0.040
Sulfur (S), % 0.16 to 0.23
0 to 0.050

Comparable Variants