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EN 1.7767 Steel vs. S40945 Stainless Steel

Both EN 1.7767 steel and S40945 stainless steel are iron alloys. They have a moderately high 91% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.7767 steel and the bottom bar is S40945 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 210
160
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
25
Fatigue Strength, MPa 320 to 340
160
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
75
Shear Strength, MPa 420 to 430
270
Tensile Strength: Ultimate (UTS), MPa 670 to 690
430
Tensile Strength: Yield (Proof), MPa 460 to 500
230

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 480
710
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1430
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 40
26
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 4.5
8.0
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 2.4
2.2
Embodied Energy, MJ/kg 33
31
Embodied Water, L/kg 64
94

Common Calculations

PREN (Pitting Resistance) 6.4
11
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
89
Resilience: Unit (Modulus of Resilience), kJ/m3 570 to 650
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24
15
Strength to Weight: Bending, points 22
16
Thermal Diffusivity, mm2/s 11
6.9
Thermal Shock Resistance, points 19 to 20
15

Alloy Composition

Carbon (C), % 0.1 to 0.15
0 to 0.030
Chromium (Cr), % 2.8 to 3.3
10.5 to 11.7
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 93.8 to 95.8
85.1 to 89.3
Manganese (Mn), % 0.3 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0 to 0.25
0 to 0.5
Niobium (Nb), % 0 to 0.070
0.18 to 0.4
Nitrogen (N), % 0 to 0.012
0 to 0.030
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0 to 0.15
0 to 1.0
Sulfur (S), % 0 to 0.0050
0 to 0.030
Titanium (Ti), % 0 to 0.030
0.050 to 0.2
Vanadium (V), % 0.2 to 0.3
0