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S17400 Stainless Steel vs. S45500 Stainless Steel

Both S17400 stainless steel and S45500 stainless steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is S17400 stainless steel and the bottom bar is S45500 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 280 to 440
280 to 500
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 21
3.4 to 11
Fatigue Strength, MPa 380 to 670
570 to 890
Poisson's Ratio 0.28
0.28
Reduction in Area, % 40 to 62
34 to 45
Rockwell C Hardness 27 to 43
32 to 54
Shear Modulus, GPa 75
75
Shear Strength, MPa 570 to 830
790 to 1090
Tensile Strength: Ultimate (UTS), MPa 910 to 1390
1370 to 1850
Tensile Strength: Yield (Proof), MPa 580 to 1250
1240 to 1700

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Corrosion, °C 450
620
Maximum Temperature: Mechanical, °C 850
760
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 11
11

Otherwise Unclassified Properties

Base Metal Price, % relative 14
17
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.7
3.8
Embodied Energy, MJ/kg 39
57
Embodied Water, L/kg 130
120

Common Calculations

PREN (Pitting Resistance) 16
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
45 to 190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 32 to 49
48 to 65
Strength to Weight: Bending, points 27 to 35
35 to 42
Thermal Shock Resistance, points 30 to 46
48 to 64

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.050
Chromium (Cr), % 15 to 17
11 to 12.5
Copper (Cu), % 3.0 to 5.0
1.5 to 2.5
Iron (Fe), % 70.4 to 78.9
71.5 to 79.2
Manganese (Mn), % 0 to 1.0
0 to 0.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 3.0 to 5.0
7.5 to 9.5
Niobium (Nb), % 0.15 to 0.45
0 to 0.5
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 0
0 to 0.5
Titanium (Ti), % 0
0.8 to 1.4