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EN 1.4303 Stainless Steel vs. EN 1.8550 Steel

Both EN 1.4303 stainless steel and EN 1.8550 steel are iron alloys. They have 72% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.4303 stainless steel and the bottom bar is EN 1.8550 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 270
300
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 13 to 49
11
Fatigue Strength, MPa 220 to 320
470
Impact Strength: V-Notched Charpy, J 91 to 98
34
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 420 to 540
600
Tensile Strength: Ultimate (UTS), MPa 590 to 900
1000
Tensile Strength: Yield (Proof), MPa 230 to 560
760

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 940
440
Melting Completion (Liquidus), °C 1420
1450
Melting Onset (Solidus), °C 1380
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
40
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 17
3.4
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.2
1.7
Embodied Energy, MJ/kg 46
23
Embodied Water, L/kg 150
67

Common Calculations

PREN (Pitting Resistance) 19
2.3
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 230
100
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 800
1550
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21 to 32
36
Strength to Weight: Bending, points 20 to 26
29
Thermal Diffusivity, mm2/s 4.0
11
Thermal Shock Resistance, points 13 to 20
29

Alloy Composition

Aluminum (Al), % 0
0.8 to 1.2
Carbon (C), % 0 to 0.060
0.3 to 0.37
Chromium (Cr), % 17 to 19
1.5 to 1.8
Iron (Fe), % 64.8 to 72
94.4 to 96.3
Manganese (Mn), % 0 to 2.0
0.4 to 0.7
Molybdenum (Mo), % 0
0.15 to 0.25
Nickel (Ni), % 11 to 13
0.85 to 1.2
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.035