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AISI 439 Stainless Steel vs. AISI 334 Stainless Steel

Both AISI 439 stainless steel and AISI 334 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 79% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is AISI 439 stainless steel and the bottom bar is AISI 334 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
180
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23
34
Fatigue Strength, MPa 170
150
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 78
79
Shear Modulus, GPa 77
77
Shear Strength, MPa 310
360
Tensile Strength: Ultimate (UTS), MPa 490
540
Tensile Strength: Yield (Proof), MPa 250
190

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 530
490
Maximum Temperature: Mechanical, °C 890
1000
Melting Completion (Liquidus), °C 1510
1410
Melting Onset (Solidus), °C 1430
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 11
16

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
22
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.3
4.1
Embodied Energy, MJ/kg 34
59
Embodied Water, L/kg 120
170

Common Calculations

PREN (Pitting Resistance) 18
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
140
Resilience: Unit (Modulus of Resilience), kJ/m3 160
96
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
19
Strength to Weight: Bending, points 18
19
Thermal Shock Resistance, points 16
12

Alloy Composition

Aluminum (Al), % 0 to 0.15
0.15 to 0.6
Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 17 to 19
18 to 20
Iron (Fe), % 77.1 to 82.8
55.7 to 62.7
Manganese (Mn), % 0 to 1.0
0 to 1.0
Nickel (Ni), % 0 to 0.5
19 to 21
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 0.2 to 1.1
0.15 to 0.6