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AISI 440A Stainless Steel vs. AISI 302 Stainless Steel

Both AISI 440A stainless steel and AISI 302 stainless steel are iron alloys. They have 89% of their average alloy composition in common. There are 31 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 AISI 440A stainless steel and the bottom bar is AISI 302 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 5.0 to 20
4.5 to 46
Fatigue Strength, MPa 270 to 790
210 to 520
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 450 to 1040
400 to 830
Tensile Strength: Ultimate (UTS), MPa 730 to 1790
580 to 1430
Tensile Strength: Yield (Proof), MPa 420 to 1650
230 to 1100

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 400
410
Maximum Temperature: Mechanical, °C 760
710
Melting Completion (Liquidus), °C 1480
1420
Melting Onset (Solidus), °C 1370
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 23
16
Thermal Expansion, µm/m-K 10
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
15
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.2
3.0
Embodied Energy, MJ/kg 31
42
Embodied Water, L/kg 120
140

Common Calculations

PREN (Pitting Resistance) 18
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 120
59 to 260
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 26 to 65
21 to 51
Strength to Weight: Bending, points 23 to 43
20 to 36
Thermal Diffusivity, mm2/s 6.2
4.4
Thermal Shock Resistance, points 26 to 65
12 to 31

Alloy Composition

Carbon (C), % 0.6 to 0.75
0 to 0.15
Chromium (Cr), % 16 to 18
17 to 19
Iron (Fe), % 78.4 to 83.4
67.9 to 75
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.75
0
Nickel (Ni), % 0
8.0 to 10
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.015
0 to 0.030

Comparable Variants