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EN 1.7725 Steel vs. S44800 Stainless Steel

Both EN 1.7725 steel and S44800 stainless steel are iron alloys. They have 67% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is EN 1.7725 steel and the bottom bar is S44800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250 to 300
190
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 14
23
Fatigue Strength, MPa 390 to 550
300
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
82
Tensile Strength: Ultimate (UTS), MPa 830 to 1000
590
Tensile Strength: Yield (Proof), MPa 610 to 860
450

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 440
1100
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 39
17
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
19
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.8
3.8
Embodied Energy, MJ/kg 24
52
Embodied Water, L/kg 54
190

Common Calculations

PREN (Pitting Resistance) 2.8
42
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 130
120
Resilience: Unit (Modulus of Resilience), kJ/m3 980 to 1940
480
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29 to 35
21
Strength to Weight: Bending, points 25 to 28
20
Thermal Diffusivity, mm2/s 11
4.6
Thermal Shock Resistance, points 24 to 29
19

Alloy Composition

Carbon (C), % 0.27 to 0.34
0 to 0.010
Chromium (Cr), % 1.3 to 1.7
28 to 30
Copper (Cu), % 0
0 to 0.15
Iron (Fe), % 95.7 to 97.5
62.6 to 66.5
Manganese (Mn), % 0.6 to 1.0
0 to 0.3
Molybdenum (Mo), % 0.3 to 0.5
3.5 to 4.2
Nickel (Ni), % 0
2.0 to 2.5
Nitrogen (N), % 0
0 to 0.020
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.6
0 to 0.2
Sulfur (S), % 0 to 0.030
0 to 0.020
Vanadium (V), % 0.050 to 0.15
0