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EN 1.4903 Stainless Steel vs. EN 1.6368 Steel

Both EN 1.4903 stainless steel and EN 1.6368 steel are iron alloys. They have a moderately high 91% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.4903 stainless steel and the bottom bar is EN 1.6368 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20 to 21
18
Fatigue Strength, MPa 320 to 330
310 to 330
Impact Strength: V-Notched Charpy, J 42 to 46
43 to 46
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
73
Shear Strength, MPa 420
410 to 430
Tensile Strength: Ultimate (UTS), MPa 670 to 680
660 to 690
Tensile Strength: Yield (Proof), MPa 500
460 to 490

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 650
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 26
40
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 4.0
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
3.4
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.6
1.7
Embodied Energy, MJ/kg 36
22
Embodied Water, L/kg 88
53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
110
Resilience: Unit (Modulus of Resilience), kJ/m3 650
580 to 650
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24
23 to 24
Strength to Weight: Bending, points 22
21 to 22
Thermal Diffusivity, mm2/s 7.0
11
Thermal Shock Resistance, points 23
20

Alloy Composition

Aluminum (Al), % 0 to 0.040
0.015 to 0.040
Carbon (C), % 0.080 to 0.12
0 to 0.17
Chromium (Cr), % 8.0 to 9.5
0 to 0.3
Copper (Cu), % 0 to 0.3
0.5 to 0.8
Iron (Fe), % 87.1 to 90.5
95.1 to 97.2
Manganese (Mn), % 0.3 to 0.6
0.8 to 1.2
Molybdenum (Mo), % 0.85 to 1.1
0.25 to 0.5
Nickel (Ni), % 0 to 0.4
1.0 to 1.3
Niobium (Nb), % 0.060 to 0.1
0.015 to 0.045
Nitrogen (N), % 0.030 to 0.070
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), % 0.18 to 0.25
0

Comparable Variants