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S44800 Stainless Steel vs. AISI 439 Stainless Steel

Both S44800 stainless steel and AISI 439 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 83% of their average alloy composition in common. There are 34 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 S44800 stainless steel and the bottom bar is AISI 439 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
160
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 23
23
Fatigue Strength, MPa 300
170
Poisson's Ratio 0.27
0.28
Reduction in Area, % 45
51
Shear Modulus, GPa 82
77
Shear Strength, MPa 370
310
Tensile Strength: Ultimate (UTS), MPa 590
490
Tensile Strength: Yield (Proof), MPa 450
250

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 460
530
Maximum Temperature: Mechanical, °C 1100
890
Melting Completion (Liquidus), °C 1460
1510
Melting Onset (Solidus), °C 1410
1430
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 17
25
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 19
9.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.8
2.3
Embodied Energy, MJ/kg 52
34
Embodied Water, L/kg 190
120

Common Calculations

PREN (Pitting Resistance) 42
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
95
Resilience: Unit (Modulus of Resilience), kJ/m3 480
160
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
18
Strength to Weight: Bending, points 20
18
Thermal Diffusivity, mm2/s 4.6
6.7
Thermal Shock Resistance, points 19
16

Alloy Composition

Aluminum (Al), % 0
0 to 0.15
Carbon (C), % 0 to 0.010
0 to 0.030
Chromium (Cr), % 28 to 30
17 to 19
Copper (Cu), % 0 to 0.15
0
Iron (Fe), % 62.6 to 66.5
77.1 to 82.8
Manganese (Mn), % 0 to 0.3
0 to 1.0
Molybdenum (Mo), % 3.5 to 4.2
0
Nickel (Ni), % 2.0 to 2.5
0 to 0.5
Nitrogen (N), % 0 to 0.020
0 to 0.030
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.2
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030
Titanium (Ti), % 0
0.2 to 1.1