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SAE-AISI 1070 Steel vs. AISI 445 Stainless Steel

Both SAE-AISI 1070 steel and AISI 445 stainless steel are iron alloys. They have 78% of their average alloy composition in common. There are 31 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 SAE-AISI 1070 steel and the bottom bar is AISI 445 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 230
160
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 10 to 13
25
Fatigue Strength, MPa 270 to 350
160
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
78
Shear Strength, MPa 380 to 460
310
Tensile Strength: Ultimate (UTS), MPa 640 to 760
480
Tensile Strength: Yield (Proof), MPa 420 to 560
230

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 400
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 50
21
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 12
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
12
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.4
2.6
Embodied Energy, MJ/kg 19
38
Embodied Water, L/kg 46
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 59 to 86
98
Resilience: Unit (Modulus of Resilience), kJ/m3 470 to 850
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 23 to 27
17
Strength to Weight: Bending, points 21 to 24
18
Thermal Diffusivity, mm2/s 14
5.6
Thermal Shock Resistance, points 21 to 25
16

Alloy Composition

Carbon (C), % 0.65 to 0.75
0 to 0.020
Chromium (Cr), % 0
19 to 21
Copper (Cu), % 0
0.3 to 0.6
Iron (Fe), % 98.3 to 98.8
74.9 to 80.7
Manganese (Mn), % 0.6 to 0.9
0 to 1.0
Nickel (Ni), % 0
0 to 0.6
Niobium (Nb), % 0
0 to 0.8
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0 to 0.050
0 to 0.012