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EN 1.8838 Steel vs. EN 1.8915 Steel

Both EN 1.8838 steel and EN 1.8915 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is EN 1.8838 steel and the bottom bar is EN 1.8915 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 19
19
Fatigue Strength, MPa 290
340
Impact Strength: V-Notched Charpy, J 58
79
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 380
400
Tensile Strength: Ultimate (UTS), MPa 610
640
Tensile Strength: Yield (Proof), MPa 430
490

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
400
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 44
46
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
2.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.7
1.7
Embodied Energy, MJ/kg 23
24
Embodied Water, L/kg 50
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
110
Resilience: Unit (Modulus of Resilience), kJ/m3 500
640
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21
23
Strength to Weight: Bending, points 20
21
Thermal Diffusivity, mm2/s 12
12
Thermal Shock Resistance, points 18
19

Alloy Composition

Aluminum (Al), % 0.015 to 0.054
0.020 to 0.050
Carbon (C), % 0 to 0.18
0 to 0.2
Chromium (Cr), % 0 to 0.35
0 to 0.3
Copper (Cu), % 0 to 0.6
0 to 0.7
Iron (Fe), % 95 to 99.985
95.2 to 98.9
Manganese (Mn), % 0 to 1.8
1.1 to 1.7
Molybdenum (Mo), % 0 to 0.23
0 to 0.1
Nickel (Ni), % 0 to 0.85
0 to 0.8
Niobium (Nb), % 0 to 0.060
0 to 0.050
Nitrogen (N), % 0 to 0.027
0 to 0.025
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0 to 0.65
0 to 0.6
Sulfur (S), % 0 to 0.025
0 to 0.0080
Titanium (Ti), % 0 to 0.060
0 to 0.030
Vanadium (V), % 0 to 0.14
0 to 0.2