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AISI 416Se (S41623) Stainless Steel

AISI 416Se stainless steel is a martensitic stainless steel formulated for primary forming into wrought products. Cited properties are appropriate for the annealed condition. 416Se is the AISI designation for this material. S41623 is the UNS number.

It has a moderately low embodied energy among wrought martensitic stainless steels. In addition, it has a moderately high ductility and a fairly low tensile strength.

The graph bars on the material properties cards below compare AISI 416Se stainless steel to: wrought martensitic stainless steels (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Brinell Hardness

230

Elastic (Young's, Tensile) Modulus

190 GPa 28 x 106 psi

Elongation at Break

23 %

Fatigue Strength

210 MPa 31 x 103 psi

Poisson's Ratio

0.28

Reduction in Area

50 %

Shear Modulus

76 GPa 11 x 106 psi

Shear Strength

340 MPa 50 x 103 psi

Tensile Strength: Ultimate (UTS)

540 MPa 79 x 103 psi

Tensile Strength: Yield (Proof)

310 MPa 45 x 103 psi

Thermal Properties

Latent Heat of Fusion

270 J/g

Maximum Temperature: Corrosion

390 °C 740 °F

Maximum Temperature: Mechanical

760 °C 1390 °F

Melting Completion (Liquidus)

1440 °C 2620 °F

Melting Onset (Solidus)

1400 °C 2550 °F

Specific Heat Capacity

480 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

30 W/m-K 17 BTU/h-ft-°F

Thermal Expansion

10 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

2.9 % IACS

Electrical Conductivity: Equal Weight (Specific)

3.3 % IACS

Otherwise Unclassified Properties

Base Metal Price

8.0 % relative

Density

7.7 g/cm3 480 lb/ft3

Embodied Carbon

1.9 kg CO2/kg material

Embodied Energy

27 MJ/kg 12 x 103 BTU/lb

Embodied Water

100 L/kg 12 gal/lb

Common Calculations

PREN (Pitting Resistance)

13

Resilience: Ultimate (Unit Rupture Work)

110 MJ/m3

Resilience: Unit (Modulus of Resilience)

250 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

20 points

Strength to Weight: Bending

19 points

Thermal Diffusivity

8.1 mm2/s

Thermal Shock Resistance

20 points

Alloy Composition

Among wrought stainless steels, the composition of AISI 416Se stainless steel is notable for including selenium (Se). Selenium is used to improve machinability.

Iron (Fe) 83.1 to 87.9
Chromium (Cr) 12 to 14
Manganese (Mn) 0 to 1.3
Silicon (Si) 0 to 1.0
Selenium (Se) 0.15 to 0.35
Carbon (C) 0 to 0.15
Phosphorus (P) 0 to 0.060
Sulfur (S) 0 to 0.060

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

ASTM A895: Standard Specification for Free-Machining Stainless Steel Plate, Sheet, and Strip

ASTM A473: Standard Specification for Stainless Steel Forgings

Welding Metallurgy and Weldability of Stainless Steels, John C. Lippold and Damian J. Kotecki, 2005

Advanced Materials in Automotive Engineering, Jason Rowe (editor), 2012

ASTM A959: Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels

Corrosion of Stainless Steels, A. John Sedriks, 1996

ASM Specialty Handbook: Stainless Steels, J. R. Davis (editor), 1994

Advances in Stainless Steels, Baldev Raj et al. (editors), 2010