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AISI 446 Stainless Steel vs. AISI 304 Stainless Steel

Both AISI 446 stainless steel and AISI 304 stainless steel are iron alloys. They have a moderately high 91% of their average alloy composition in common. There are 34 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is AISI 446 stainless steel and the bottom bar is AISI 304 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
170 to 360
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23
8.0 to 43
Fatigue Strength, MPa 200
210 to 440
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 79
77
Shear Strength, MPa 360
400 to 690
Tensile Strength: Ultimate (UTS), MPa 570
580 to 1180
Tensile Strength: Yield (Proof), MPa 300
230 to 860

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 440
420
Maximum Temperature: Mechanical, °C 1180
710
Melting Completion (Liquidus), °C 1510
1450
Melting Onset (Solidus), °C 1430
1400
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 17
16
Thermal Expansion, µm/m-K 11
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 12
15
Calomel Potential, mV -230
-80
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.4
3.0
Embodied Energy, MJ/kg 35
43
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 27
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
86 to 250
Resilience: Unit (Modulus of Resilience), kJ/m3 230
140 to 1870
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 26
25
Strength to Weight: Axial, points 21
21 to 42
Strength to Weight: Bending, points 20
20 to 32
Thermal Diffusivity, mm2/s 4.6
4.2
Thermal Shock Resistance, points 19
12 to 25

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.080
Chromium (Cr), % 23 to 27
18 to 20
Iron (Fe), % 69.2 to 77
66.5 to 74
Manganese (Mn), % 0 to 1.5
0 to 2.0
Nickel (Ni), % 0 to 0.75
8.0 to 10.5
Nitrogen (N), % 0 to 0.25
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 0.030
0 to 0.030