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EN 1.4903 Stainless Steel vs. EN 1.8509 Steel

Both EN 1.4903 stainless steel and EN 1.8509 steel are iron alloys. They have a moderately high 92% of their average alloy composition in common. There are 32 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 1.4903 stainless steel and the bottom bar is EN 1.8509 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20 to 21
11
Fatigue Strength, MPa 320 to 330
580
Impact Strength: V-Notched Charpy, J 42 to 46
29
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
73
Shear Strength, MPa 420
680
Tensile Strength: Ultimate (UTS), MPa 670 to 680
1130
Tensile Strength: Yield (Proof), MPa 500
940

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 650
440
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 26
39
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
2.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.6
1.6
Embodied Energy, MJ/kg 36
22
Embodied Water, L/kg 88
65

Common Calculations

PREN (Pitting Resistance) 13
2.6
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
120
Resilience: Unit (Modulus of Resilience), kJ/m3 650
2340
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
40
Strength to Weight: Bending, points 22
31
Thermal Diffusivity, mm2/s 7.0
10
Thermal Shock Resistance, points 23
33

Alloy Composition

Aluminum (Al), % 0 to 0.040
0.8 to 1.2
Carbon (C), % 0.080 to 0.12
0.38 to 0.45
Chromium (Cr), % 8.0 to 9.5
1.5 to 1.8
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 87.1 to 90.5
95.5 to 97.1
Manganese (Mn), % 0.3 to 0.6
0.4 to 0.7
Molybdenum (Mo), % 0.85 to 1.1
0.2 to 0.35
Nickel (Ni), % 0 to 0.4
0
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.5
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.035
Vanadium (V), % 0.18 to 0.25
0