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SAE-AISI 1039 Steel vs. EN 1.0303 Steel

Both SAE-AISI 1039 steel and EN 1.0303 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is SAE-AISI 1039 steel and the bottom bar is EN 1.0303 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 200
84 to 120
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 14 to 18
12 to 25
Fatigue Strength, MPa 230 to 370
150 to 230
Poisson's Ratio 0.29
0.29
Reduction in Area, % 40 to 45
75 to 86
Shear Modulus, GPa 73
73
Shear Strength, MPa 380 to 420
220 to 260
Tensile Strength: Ultimate (UTS), MPa 610 to 690
290 to 410
Tensile Strength: Yield (Proof), MPa 340 to 580
200 to 320

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
400
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1420
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 51
53
Thermal Expansion, µm/m-K 12
12

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
1.8
Density, g/cm3 7.8
7.9
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 88 to 94
30 to 94
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 890
110 to 270
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 22 to 24
10 to 15
Strength to Weight: Bending, points 20 to 22
12 to 16
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 19 to 22
9.2 to 13

Alloy Composition

Aluminum (Al), % 0
0.020 to 0.060
Carbon (C), % 0.37 to 0.44
0.020 to 0.060
Iron (Fe), % 98.5 to 98.9
99.335 to 99.71
Manganese (Mn), % 0.7 to 1.0
0.25 to 0.4
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0
0 to 0.1
Sulfur (S), % 0 to 0.050
0 to 0.025

Comparable Variants