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S17700 Stainless Steel vs. EN 1.7725 Steel

Both S17700 stainless steel and EN 1.7725 steel are iron alloys. They have 76% 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 S17700 stainless steel and the bottom bar is EN 1.7725 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 430
250 to 300
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 1.0 to 23
14
Fatigue Strength, MPa 290 to 560
390 to 550
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Tensile Strength: Ultimate (UTS), MPa 1180 to 1650
830 to 1000
Tensile Strength: Yield (Proof), MPa 430 to 1210
610 to 860

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 890
440
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
39
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 13
2.9
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.8
1.8
Embodied Energy, MJ/kg 40
24
Embodied Water, L/kg 150
54

Common Calculations

PREN (Pitting Resistance) 17
2.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 15 to 210
110 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 460 to 3750
980 to 1940
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 42 to 59
29 to 35
Strength to Weight: Bending, points 32 to 40
25 to 28
Thermal Diffusivity, mm2/s 4.1
11
Thermal Shock Resistance, points 39 to 54
24 to 29

Alloy Composition

Aluminum (Al), % 0.75 to 1.5
0
Carbon (C), % 0 to 0.090
0.27 to 0.34
Chromium (Cr), % 16 to 18
1.3 to 1.7
Iron (Fe), % 70.5 to 76.8
95.7 to 97.5
Manganese (Mn), % 0 to 1.0
0.6 to 1.0
Molybdenum (Mo), % 0
0.3 to 0.5
Nickel (Ni), % 6.5 to 7.8
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0
0.050 to 0.15

Comparable Variants