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EN 1.4438 Stainless Steel vs. EN 1.7725 Steel

Both EN 1.4438 stainless steel and EN 1.7725 steel are iron alloys. They have 65% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4438 stainless steel and the bottom bar is EN 1.7725 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
250 to 300
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 41
14
Fatigue Strength, MPa 220
390 to 550
Impact Strength: V-Notched Charpy, J 90
34 to 35
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 79
73
Tensile Strength: Ultimate (UTS), MPa 620
830 to 1000
Tensile Strength: Yield (Proof), MPa 250
610 to 860

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 1000
440
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 14
39
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 22
2.9
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 4.4
1.8
Embodied Energy, MJ/kg 60
24
Embodied Water, L/kg 160
54

Common Calculations

PREN (Pitting Resistance) 31
2.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
110 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 150
980 to 1940
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 22
29 to 35
Strength to Weight: Bending, points 20
25 to 28
Thermal Diffusivity, mm2/s 3.7
11
Thermal Shock Resistance, points 14
24 to 29

Alloy Composition

Carbon (C), % 0 to 0.030
0.27 to 0.34
Chromium (Cr), % 17.5 to 19.5
1.3 to 1.7
Iron (Fe), % 57.3 to 66.5
95.7 to 97.5
Manganese (Mn), % 0 to 2.0
0.6 to 1.0
Molybdenum (Mo), % 3.0 to 4.0
0.3 to 0.5
Nickel (Ni), % 13 to 16
0
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 0.6
Sulfur (S), % 0 to 0.015
0 to 0.030
Vanadium (V), % 0
0.050 to 0.15