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EN 1.4109 Stainless Steel vs. S40975 Stainless Steel

Both EN 1.4109 stainless steel and S40975 stainless steel are iron alloys. Both are furnished in the annealed condition. They have a moderately high 95% 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 1.4109 stainless steel and the bottom bar is S40975 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
170
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 19
22
Fatigue Strength, MPa 270
210
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
75
Shear Strength, MPa 480
290
Tensile Strength: Ultimate (UTS), MPa 770
460
Tensile Strength: Yield (Proof), MPa 420
310

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Corrosion, °C 390
450
Maximum Temperature: Mechanical, °C 820
710
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 30
26
Thermal Expansion, µm/m-K 10
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.7
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
6.5
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.2
2.0
Embodied Energy, MJ/kg 30
28
Embodied Water, L/kg 110
95

Common Calculations

PREN (Pitting Resistance) 17
11
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
93
Resilience: Unit (Modulus of Resilience), kJ/m3 460
250
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28
17
Strength to Weight: Bending, points 24
17
Thermal Diffusivity, mm2/s 8.1
7.0
Thermal Shock Resistance, points 28
17

Alloy Composition

Carbon (C), % 0.6 to 0.75
0 to 0.030
Chromium (Cr), % 14 to 16
10.5 to 11.7
Iron (Fe), % 80.7 to 85
84.4 to 89
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.4 to 0.8
0
Nickel (Ni), % 0
0.5 to 1.0
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.7
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Titanium (Ti), % 0
0 to 0.75