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EN 1.0303 Steel vs. SAE-AISI 1042 Steel

Both EN 1.0303 steel and SAE-AISI 1042 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is EN 1.0303 steel and the bottom bar is SAE-AISI 1042 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 84 to 120
180 to 200
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12 to 25
14 to 18
Fatigue Strength, MPa 150 to 230
230 to 370
Poisson's Ratio 0.29
0.29
Reduction in Area, % 75 to 86
39 to 50
Shear Modulus, GPa 73
73
Shear Strength, MPa 220 to 260
380 to 420
Tensile Strength: Ultimate (UTS), MPa 290 to 410
620 to 700
Tensile Strength: Yield (Proof), MPa 200 to 320
340 to 580

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
400
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 53
52
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.9
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 7.9
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
1.8
Density, g/cm3 7.9
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 30 to 94
87 to 94
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 270
320 to 900
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 10 to 15
22 to 25
Strength to Weight: Bending, points 12 to 16
21 to 22
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 9.2 to 13
20 to 22

Alloy Composition

Aluminum (Al), % 0.020 to 0.060
0
Carbon (C), % 0.020 to 0.060
0.4 to 0.47
Iron (Fe), % 99.335 to 99.71
98.5 to 99
Manganese (Mn), % 0.25 to 0.4
0.6 to 0.9
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0 to 0.1
0
Sulfur (S), % 0 to 0.025
0 to 0.050

Comparable Variants