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EN 1.4981 Stainless Steel vs. SAE-AISI 6118 Steel

Both EN 1.4981 stainless steel and SAE-AISI 6118 steel are iron alloys. They have 65% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4981 stainless steel and the bottom bar is SAE-AISI 6118 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
140
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 39
23
Fatigue Strength, MPa 210
210
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 420
300
Tensile Strength: Ultimate (UTS), MPa 610
470
Tensile Strength: Yield (Proof), MPa 240
290

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 940
410
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 16
45
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 25
2.1
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 4.8
1.7
Embodied Energy, MJ/kg 67
23
Embodied Water, L/kg 150
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
93
Resilience: Unit (Modulus of Resilience), kJ/m3 150
220
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21
17
Strength to Weight: Bending, points 20
17
Thermal Diffusivity, mm2/s 4.3
12
Thermal Shock Resistance, points 14
14

Alloy Composition

Carbon (C), % 0.040 to 0.1
0.16 to 0.21
Chromium (Cr), % 15.5 to 17.5
0.5 to 0.7
Iron (Fe), % 59.6 to 66.7
97.8 to 98.6
Manganese (Mn), % 0 to 1.5
0.5 to 0.7
Molybdenum (Mo), % 1.6 to 2.0
0
Nickel (Ni), % 15.5 to 17.5
0
Niobium (Nb), % 0.4 to 1.2
0
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0.3 to 0.6
0.15 to 0.35
Sulfur (S), % 0 to 0.015
0 to 0.040
Vanadium (V), % 0
0.1 to 0.15