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EN 1.0303 Steel vs. SAE-AISI 1108 Steel

Both EN 1.0303 steel and SAE-AISI 1108 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 1108 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 84 to 120
110 to 140
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12 to 25
23 to 34
Fatigue Strength, MPa 150 to 230
170 to 260
Poisson's Ratio 0.29
0.29
Reduction in Area, % 75 to 86
45 to 57
Shear Modulus, GPa 73
73
Shear Strength, MPa 220 to 260
250 to 280
Tensile Strength: Ultimate (UTS), MPa 290 to 410
380 to 440
Tensile Strength: Yield (Proof), MPa 200 to 320
220 to 360

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
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
1.8
Density, g/cm3 7.9
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 30 to 94
95 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 270
130 to 340
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 10 to 15
13 to 16
Strength to Weight: Bending, points 12 to 16
15 to 16
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 9.2 to 13
12 to 14

Alloy Composition

Aluminum (Al), % 0.020 to 0.060
0
Carbon (C), % 0.020 to 0.060
0.080 to 0.13
Iron (Fe), % 99.335 to 99.71
98.9 to 99.24
Manganese (Mn), % 0.25 to 0.4
0.6 to 0.8
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0 to 0.1
0
Sulfur (S), % 0 to 0.025
0.080 to 0.13

Comparable Variants