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EN 1.6958 Steel vs. AISI 445 Stainless Steel

Both EN 1.6958 steel and AISI 445 stainless steel are iron alloys. They have 80% of their average alloy composition in common. There are 32 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 EN 1.6958 steel and the bottom bar is AISI 445 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 340
160
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 16
25
Fatigue Strength, MPa 700
160
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Shear Strength, MPa 700
310
Tensile Strength: Ultimate (UTS), MPa 1140
480
Tensile Strength: Yield (Proof), MPa 1070
230

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 450
950
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 47
21
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
12
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 2.0
2.6
Embodied Energy, MJ/kg 27
38
Embodied Water, L/kg 60
130

Common Calculations

PREN (Pitting Resistance) 2.9
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
98
Resilience: Unit (Modulus of Resilience), kJ/m3 3050
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 40
17
Strength to Weight: Bending, points 31
18
Thermal Diffusivity, mm2/s 13
5.6
Thermal Shock Resistance, points 39
16

Alloy Composition

Aluminum (Al), % 0.0050 to 0.050
0
Carbon (C), % 0.25 to 0.3
0 to 0.020
Chromium (Cr), % 1.2 to 1.7
19 to 21
Copper (Cu), % 0
0.3 to 0.6
Iron (Fe), % 92.6 to 94.5
74.9 to 80.7
Manganese (Mn), % 0.2 to 0.5
0 to 1.0
Molybdenum (Mo), % 0.35 to 0.55
0
Nickel (Ni), % 3.3 to 3.8
0 to 0.6
Niobium (Nb), % 0
0 to 0.8
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0.15 to 0.3
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.012
Vanadium (V), % 0 to 0.12
0