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EN 1.3551 Steel vs. S44625 Stainless Steel

Both EN 1.3551 steel and S44625 stainless steel are iron alloys. They have 78% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is EN 1.3551 steel and the bottom bar is S44625 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 75
80
Tensile Strength: Ultimate (UTS), MPa 720
590

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Maximum Temperature: Mechanical, °C 530
1100
Melting Completion (Liquidus), °C 1490
1440
Melting Onset (Solidus), °C 1450
1400
Specific Heat Capacity, J/kg-K 460
480
Thermal Conductivity, W/m-K 36
17
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.6
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 9.9
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
14
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 4.9
2.8
Embodied Energy, MJ/kg 71
39
Embodied Water, L/kg 82
160

Common Calculations

PREN (Pitting Resistance) 18
30
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26
21
Strength to Weight: Bending, points 23
20
Thermal Diffusivity, mm2/s 9.8
4.6
Thermal Shock Resistance, points 21
19

Alloy Composition

Carbon (C), % 0.77 to 0.85
0 to 0.010
Chromium (Cr), % 3.9 to 4.3
25 to 27.5
Copper (Cu), % 0 to 0.3
0 to 0.2
Iron (Fe), % 88.8 to 91.1
69.4 to 74.3
Manganese (Mn), % 0.15 to 0.35
0 to 0.4
Molybdenum (Mo), % 4.0 to 4.5
0.75 to 1.5
Nickel (Ni), % 0
0 to 0.5
Nitrogen (N), % 0
0 to 0.015
Phosphorus (P), % 0 to 0.025
0 to 0.020
Silicon (Si), % 0 to 0.4
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.020
Tungsten (W), % 0 to 0.25
0
Vanadium (V), % 0.9 to 1.1
0