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EN 1.8958 Steel vs. EN 1.1191 Steel

Both EN 1.8958 steel and EN 1.1191 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is EN 1.8958 steel and the bottom bar is EN 1.1191 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130
180 to 200
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 19
16 to 17
Fatigue Strength, MPa 150
210 to 290
Impact Strength: V-Notched Charpy, J 30
16 to 29
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
72
Shear Strength, MPa 270
380 to 430
Tensile Strength: Ultimate (UTS), MPa 430
630 to 700
Tensile Strength: Yield (Proof), MPa 220
310 to 440

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 46
48
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
2.1
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.4
Embodied Energy, MJ/kg 19
19
Embodied Water, L/kg 50
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70
83 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 130
260 to 510
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 15
22 to 25
Strength to Weight: Bending, points 16
21 to 22
Thermal Diffusivity, mm2/s 12
13
Thermal Shock Resistance, points 13
20 to 22

Alloy Composition

Carbon (C), % 0 to 0.16
0.42 to 0.5
Chromium (Cr), % 0.35 to 0.85
0 to 0.4
Copper (Cu), % 0.2 to 0.6
0
Iron (Fe), % 96.5 to 99.3
97.3 to 99.08
Manganese (Mn), % 0.15 to 0.7
0.5 to 0.8
Molybdenum (Mo), % 0
0 to 0.1
Nickel (Ni), % 0 to 0.7
0 to 0.4
Nitrogen (N), % 0 to 0.010
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 0.45
0 to 0.4
Sulfur (S), % 0 to 0.040
0 to 0.035