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S17400 Stainless Steel vs. S40945 Stainless Steel

Both S17400 stainless steel and S40945 stainless steel are iron alloys. They have 87% of their average alloy composition in common. There are 33 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 S17400 stainless steel and the bottom bar is S40945 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 280 to 440
160
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 21
25
Fatigue Strength, MPa 380 to 670
160
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
75
Shear Strength, MPa 570 to 830
270
Tensile Strength: Ultimate (UTS), MPa 910 to 1390
430
Tensile Strength: Yield (Proof), MPa 580 to 1250
230

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Corrosion, °C 450
450
Maximum Temperature: Mechanical, °C 850
710
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 17
26
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 14
8.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.7
2.2
Embodied Energy, MJ/kg 39
31
Embodied Water, L/kg 130
94

Common Calculations

PREN (Pitting Resistance) 16
11
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
89
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 4060
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32 to 49
15
Strength to Weight: Bending, points 27 to 35
16
Thermal Diffusivity, mm2/s 4.5
6.9
Thermal Shock Resistance, points 30 to 46
15

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.030
Chromium (Cr), % 15 to 17
10.5 to 11.7
Copper (Cu), % 3.0 to 5.0
0
Iron (Fe), % 70.4 to 78.9
85.1 to 89.3
Manganese (Mn), % 0 to 1.0
0 to 1.0
Nickel (Ni), % 3.0 to 5.0
0 to 0.5
Niobium (Nb), % 0.15 to 0.45
0.18 to 0.4
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0
0.050 to 0.2