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EN 1.7725 Steel vs. S44635 Stainless Steel

Both EN 1.7725 steel and S44635 stainless steel are iron alloys. They have 68% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.7725 steel and the bottom bar is S44635 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250 to 300
240
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 14
23
Fatigue Strength, MPa 390 to 550
390
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
81
Tensile Strength: Ultimate (UTS), MPa 830 to 1000
710
Tensile Strength: Yield (Proof), MPa 610 to 860
580

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
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
16
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
22
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.8
4.4
Embodied Energy, MJ/kg 24
62
Embodied Water, L/kg 54
170

Common Calculations

PREN (Pitting Resistance) 2.8
39
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 130
150
Resilience: Unit (Modulus of Resilience), kJ/m3 980 to 1940
810
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29 to 35
25
Strength to Weight: Bending, points 25 to 28
23
Thermal Diffusivity, mm2/s 11
4.4
Thermal Shock Resistance, points 24 to 29
23

Alloy Composition

Carbon (C), % 0.27 to 0.34
0 to 0.025
Chromium (Cr), % 1.3 to 1.7
24.5 to 26
Iron (Fe), % 95.7 to 97.5
61.5 to 68.5
Manganese (Mn), % 0.6 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.3 to 0.5
3.5 to 4.5
Nickel (Ni), % 0
3.5 to 4.5
Niobium (Nb), % 0
0.2 to 0.8
Nitrogen (N), % 0
0 to 0.035
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.6
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0
0.2 to 0.8
Vanadium (V), % 0.050 to 0.15
0