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AISI 334 Stainless Steel vs. S40945 Stainless Steel

Both AISI 334 stainless steel and S40945 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 72% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is AISI 334 stainless steel and the bottom bar is S40945 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
160
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34
25
Fatigue Strength, MPa 150
160
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 79
69
Shear Modulus, GPa 77
75
Shear Strength, MPa 360
270
Tensile Strength: Ultimate (UTS), MPa 540
430
Tensile Strength: Yield (Proof), MPa 190
230

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Maximum Temperature: Corrosion, °C 490
450
Maximum Temperature: Mechanical, °C 1000
710
Melting Completion (Liquidus), °C 1410
1450
Melting Onset (Solidus), °C 1370
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 16
10

Otherwise Unclassified Properties

Base Metal Price, % relative 22
8.0
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 4.1
2.2
Embodied Energy, MJ/kg 59
31
Embodied Water, L/kg 170
94

Common Calculations

PREN (Pitting Resistance) 19
11
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
89
Resilience: Unit (Modulus of Resilience), kJ/m3 96
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
15
Strength to Weight: Bending, points 19
16
Thermal Shock Resistance, points 12
15

Alloy Composition

Aluminum (Al), % 0.15 to 0.6
0
Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 18 to 20
10.5 to 11.7
Iron (Fe), % 55.7 to 62.7
85.1 to 89.3
Manganese (Mn), % 0 to 1.0
0 to 1.0
Nickel (Ni), % 19 to 21
0 to 0.5
Niobium (Nb), % 0
0.18 to 0.4
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Titanium (Ti), % 0.15 to 0.6
0.050 to 0.2