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EN 1.4938 Stainless Steel vs. EN 1.6368 Steel

Both EN 1.4938 stainless steel and EN 1.6368 steel are iron alloys. They have 85% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.4938 stainless steel and the bottom bar is EN 1.6368 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 16 to 17
18
Fatigue Strength, MPa 390 to 520
310 to 330
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Shear Strength, MPa 540 to 630
410 to 430
Tensile Strength: Ultimate (UTS), MPa 870 to 1030
660 to 690
Tensile Strength: Yield (Proof), MPa 640 to 870
460 to 490

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 750
410
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 30
40
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 10
3.4
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.3
1.7
Embodied Energy, MJ/kg 47
22
Embodied Water, L/kg 110
53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
110
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1920
580 to 650
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 31 to 37
23 to 24
Strength to Weight: Bending, points 26 to 29
21 to 22
Thermal Diffusivity, mm2/s 8.1
11
Thermal Shock Resistance, points 30 to 35
20

Alloy Composition

Aluminum (Al), % 0
0.015 to 0.040
Carbon (C), % 0.080 to 0.15
0 to 0.17
Chromium (Cr), % 11 to 12.5
0 to 0.3
Copper (Cu), % 0
0.5 to 0.8
Iron (Fe), % 80.5 to 84.8
95.1 to 97.2
Manganese (Mn), % 0.4 to 0.9
0.8 to 1.2
Molybdenum (Mo), % 1.5 to 2.0
0.25 to 0.5
Nickel (Ni), % 2.0 to 3.0
1.0 to 1.3
Niobium (Nb), % 0
0.015 to 0.045
Nitrogen (N), % 0.020 to 0.040
0 to 0.020
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.5
0.25 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.010
Vanadium (V), % 0.25 to 0.4
0

Comparable Variants