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SAE-AISI 1045 Steel vs. SAE-AISI 1212 Steel

Both SAE-AISI 1045 steel and SAE-AISI 1212 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is SAE-AISI 1045 steel and the bottom bar is SAE-AISI 1212 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 190
140 to 180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 13 to 18
11 to 28
Fatigue Strength, MPa 220 to 370
200 to 290
Poisson's Ratio 0.29
0.29
Reduction in Area, % 40 to 51
39 to 51
Shear Modulus, GPa 72
73
Shear Strength, MPa 380 to 410
280 to 370
Tensile Strength: Ultimate (UTS), MPa 620 to 680
440 to 620
Tensile Strength: Yield (Proof), MPa 330 to 580
260 to 460

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 51
52
Thermal Expansion, µm/m-K 12
12

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
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 93
64 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 900
180 to 560
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 22 to 24
15 to 22
Strength to Weight: Bending, points 21 to 22
16 to 20
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 20 to 22
14 to 20

Alloy Composition

Carbon (C), % 0.43 to 0.5
0 to 0.13
Iron (Fe), % 98.5 to 99
98.5 to 99.07
Manganese (Mn), % 0.6 to 0.9
0.7 to 1.0
Phosphorus (P), % 0 to 0.040
0.070 to 0.12
Sulfur (S), % 0 to 0.050
0.16 to 0.23

Comparable Variants