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S44660 Stainless Steel vs. S40977 Stainless Steel

Both S44660 stainless steel and S40977 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 79% of their average alloy composition in common.

For each property being compared, the top bar is S44660 stainless steel and the bottom bar is S40977 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
160
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 20
21
Fatigue Strength, MPa 330
200
Poisson's Ratio 0.27
0.28
Rockwell B Hardness 88
76
Shear Modulus, GPa 81
76
Shear Strength, MPa 410
320
Tensile Strength: Ultimate (UTS), MPa 660
510
Tensile Strength: Yield (Proof), MPa 510
310

Thermal Properties

Latent Heat of Fusion, J/g 300
270
Maximum Temperature: Corrosion, °C 640
390
Maximum Temperature: Mechanical, °C 1100
720
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 17
25
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 21
6.5
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 4.3
1.9
Embodied Energy, MJ/kg 61
27
Embodied Water, L/kg 180
97

Common Calculations

PREN (Pitting Resistance) 38
12
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
92
Resilience: Unit (Modulus of Resilience), kJ/m3 640
250
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
18
Strength to Weight: Bending, points 22
18
Thermal Diffusivity, mm2/s 4.5
6.7
Thermal Shock Resistance, points 21
18

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 25 to 28
10.5 to 12.5
Iron (Fe), % 60.4 to 71
83.9 to 89.2
Manganese (Mn), % 0 to 1.0
0 to 1.5
Molybdenum (Mo), % 3.0 to 4.0
0
Nickel (Ni), % 1.0 to 3.5
0.3 to 1.0
Niobium (Nb), % 0.2 to 1.0
0
Nitrogen (N), % 0 to 0.040
0 to 0.030
Phosphorus (P), % 0 to 0.040
0 to 0.040
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 1.0
0