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SAE-AISI 4042 Steel vs. EN 1.1127 Steel

Both SAE-AISI 4042 steel and EN 1.1127 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 4042 steel and the bottom bar is EN 1.1127 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
190 to 230
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 13
14 to 25
Fatigue Strength, MPa 360
280 to 370
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 410
420 to 480
Tensile Strength: Ultimate (UTS), MPa 680
660 to 790
Tensile Strength: Yield (Proof), MPa 570
410 to 580

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
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 49
49
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
8.4

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
1.5
Embodied Energy, MJ/kg 19
19
Embodied Water, L/kg 47
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 81
90 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 860
440 to 880
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24
23 to 28
Strength to Weight: Bending, points 22
22 to 24
Thermal Diffusivity, mm2/s 13
13
Thermal Shock Resistance, points 22
21 to 25

Alloy Composition

Carbon (C), % 0.4 to 0.45
0.34 to 0.42
Chromium (Cr), % 0
0 to 0.4
Iron (Fe), % 97.9 to 98.6
96.6 to 98.1
Manganese (Mn), % 0.7 to 0.9
1.4 to 1.7
Molybdenum (Mo), % 0.2 to 0.3
0 to 0.1
Nickel (Ni), % 0
0 to 0.4
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 to 0.040
0 to 0.035