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EN 1.4640 Stainless Steel vs. S40945 Stainless Steel

Both EN 1.4640 stainless steel and S40945 stainless steel are iron alloys. They have 83% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.4640 stainless steel and the bottom bar is S40945 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 200
160
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 51
25
Fatigue Strength, MPa 230 to 250
160
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
75
Shear Strength, MPa 440 to 460
270
Tensile Strength: Ultimate (UTS), MPa 620 to 650
430
Tensile Strength: Yield (Proof), MPa 240 to 260
230

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Corrosion, °C 420
450
Maximum Temperature: Mechanical, °C 930
710
Melting Completion (Liquidus), °C 1420
1450
Melting Onset (Solidus), °C 1380
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
26
Thermal Expansion, µm/m-K 16
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
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 2.8
2.2
Embodied Energy, MJ/kg 40
31
Embodied Water, L/kg 150
94

Common Calculations

PREN (Pitting Resistance) 20
11
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250 to 260
89
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 170
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22 to 23
15
Strength to Weight: Bending, points 21
16
Thermal Diffusivity, mm2/s 4.0
6.9
Thermal Shock Resistance, points 14 to 15
15

Alloy Composition

Carbon (C), % 0.030 to 0.080
0 to 0.030
Chromium (Cr), % 18 to 19
10.5 to 11.7
Copper (Cu), % 1.3 to 2.0
0
Iron (Fe), % 67.4 to 73.6
85.1 to 89.3
Manganese (Mn), % 1.5 to 4.0
0 to 1.0
Nickel (Ni), % 5.5 to 6.9
0 to 0.5
Niobium (Nb), % 0
0.18 to 0.4
Nitrogen (N), % 0.030 to 0.11
0 to 0.030
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Titanium (Ti), % 0
0.050 to 0.2