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EN 1.4371 Stainless Steel vs. EN 1.3551 Steel

Both EN 1.4371 stainless steel and EN 1.3551 steel are iron alloys. They have 75% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is EN 1.4371 stainless steel and the bottom bar is EN 1.3551 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220 to 230
220
Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
75
Tensile Strength: Ultimate (UTS), MPa 740 to 750
720

Thermal Properties

Latent Heat of Fusion, J/g 280
260
Maximum Temperature: Mechanical, °C 880
530
Melting Completion (Liquidus), °C 1410
1490
Melting Onset (Solidus), °C 1370
1450
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 15
36
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
8.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
9.9

Otherwise Unclassified Properties

Base Metal Price, % relative 12
9.0
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.6
4.9
Embodied Energy, MJ/kg 38
71
Embodied Water, L/kg 140
82

Common Calculations

PREN (Pitting Resistance) 20
18
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 27
26
Strength to Weight: Bending, points 24
23
Thermal Diffusivity, mm2/s 4.0
9.8
Thermal Shock Resistance, points 16
21

Alloy Composition

Carbon (C), % 0 to 0.030
0.77 to 0.85
Chromium (Cr), % 16 to 17.5
3.9 to 4.3
Copper (Cu), % 0 to 1.0
0 to 0.3
Iron (Fe), % 66.7 to 74.4
88.8 to 91.1
Manganese (Mn), % 6.0 to 8.0
0.15 to 0.35
Molybdenum (Mo), % 0
4.0 to 4.5
Nickel (Ni), % 3.5 to 5.5
0
Nitrogen (N), % 0.15 to 0.25
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 0.015
Tungsten (W), % 0
0 to 0.25
Vanadium (V), % 0
0.9 to 1.1