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SAE-AISI 4028 Steel vs. SAE-AISI 51B60 Steel

Both SAE-AISI 4028 steel and SAE-AISI 51B60 steel are iron alloys. They have a very high 99% of their average alloy composition in common.

For each property being compared, the top bar is SAE-AISI 4028 steel and the bottom bar is SAE-AISI 51B60 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 190
200
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 14 to 23
12 to 21
Fatigue Strength, MPa 180 to 330
280 to 340
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 310 to 380
390 to 420
Tensile Strength: Ultimate (UTS), MPa 490 to 630
660
Tensile Strength: Yield (Proof), MPa 260 to 520
400 to 550

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
420
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 49
43
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.4
Embodied Energy, MJ/kg 19
19
Embodied Water, L/kg 47
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 81 to 95
73 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 720
420 to 800
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17 to 22
23
Strength to Weight: Bending, points 18 to 21
22
Thermal Diffusivity, mm2/s 13
12
Thermal Shock Resistance, points 16 to 20
19

Alloy Composition

Boron (B), % 0
0.00050 to 0.0030
Carbon (C), % 0.25 to 0.3
0.56 to 0.64
Chromium (Cr), % 0
0.7 to 0.9
Iron (Fe), % 98.1 to 98.7
97 to 97.8
Manganese (Mn), % 0.7 to 0.9
0.75 to 1.0
Molybdenum (Mo), % 0.2 to 0.3
0
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0.15 to 0.35
0.15 to 0.35
Sulfur (S), % 0.035 to 0.050
0 to 0.040

Comparable Variants