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N08904 Stainless Steel vs. S41045 Stainless Steel

Both N08904 stainless steel and S41045 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 60% of their average alloy composition in common.

For each property being compared, the top bar is N08904 stainless steel and the bottom bar is S41045 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
160
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 38
25
Fatigue Strength, MPa 200
160
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 77
70
Shear Modulus, GPa 79
76
Shear Strength, MPa 370
280
Tensile Strength: Ultimate (UTS), MPa 540
430
Tensile Strength: Yield (Proof), MPa 240
230

Thermal Properties

Latent Heat of Fusion, J/g 300
270
Maximum Temperature: Corrosion, °C 430
430
Maximum Temperature: Mechanical, °C 1100
740
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1390
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 12
29
Thermal Expansion, µm/m-K 16
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 32
8.5
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 5.8
2.2
Embodied Energy, MJ/kg 79
31
Embodied Water, L/kg 200
100

Common Calculations

PREN (Pitting Resistance) 37
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
92
Resilience: Unit (Modulus of Resilience), kJ/m3 150
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19
16
Strength to Weight: Bending, points 18
16
Thermal Diffusivity, mm2/s 3.1
7.8
Thermal Shock Resistance, points 12
16

Alloy Composition

Carbon (C), % 0 to 0.020
0 to 0.030
Chromium (Cr), % 19 to 23
12 to 13
Copper (Cu), % 1.0 to 2.0
0
Iron (Fe), % 38.8 to 53
83.8 to 88
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 4.0 to 5.0
0
Nickel (Ni), % 23 to 28
0 to 0.5
Niobium (Nb), % 0
0 to 0.6
Nitrogen (N), % 0 to 0.1
0 to 0.030
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.035
0 to 0.030