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SAE-AISI 1025 Steel vs. AISI 309H Stainless Steel

Both SAE-AISI 1025 steel and AISI 309H stainless steel are iron alloys. They have 63% 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 SAE-AISI 1025 steel and the bottom bar is AISI 309H stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 140
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 17 to 28
40
Fatigue Strength, MPa 190 to 280
200
Poisson's Ratio 0.29
0.27
Reduction in Area, % 45 to 57
51
Shear Modulus, GPa 73
78
Shear Strength, MPa 290 to 310
400
Tensile Strength: Ultimate (UTS), MPa 450 to 500
580
Tensile Strength: Yield (Proof), MPa 250 to 420
230

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 400
1080
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1420
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 52
15
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.9
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
19
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.4
3.6
Embodied Energy, MJ/kg 18
51
Embodied Water, L/kg 45
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 80 to 110
190
Resilience: Unit (Modulus of Resilience), kJ/m3 170 to 470
130
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 16 to 18
21
Strength to Weight: Bending, points 17 to 18
20
Thermal Diffusivity, mm2/s 14
4.0
Thermal Shock Resistance, points 14 to 16
13

Alloy Composition

Carbon (C), % 0.22 to 0.28
0.040 to 0.1
Chromium (Cr), % 0
22 to 24
Iron (Fe), % 99.03 to 99.48
58.1 to 66
Manganese (Mn), % 0.3 to 0.6
0 to 2.0
Nickel (Ni), % 0
12 to 15
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0
0 to 0.75
Sulfur (S), % 0 to 0.050
0 to 0.030