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UNS N08367 Stainless Steel

N08367 stainless steel is a superaustenitic (highly alloyed) stainless steel formulated for primary forming into wrought products. Cited properties are appropriate for the annealed condition.

This material is well established: the Further Reading section below cites a number of published standards, and that list is not necessarily exhaustive.

It has a moderately low ductility and a moderately high tensile strength among wrought superaustenitic stainless steels.

The graph bars on the material properties cards below compare N08367 stainless steel to: wrought superaustenitic 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

210

Elastic (Young's, Tensile) Modulus

210 GPa 30 x 10⁶ psi

Elongation at Break

34 %

Fatigue Strength

280 MPa 40 x 10³ psi

Poisson's Ratio

0.28

Reduction in Area

56 %

Rockwell B Hardness

Shear Modulus

80 GPa 12 x 10⁶ psi

Shear Strength

490 MPa 71 x 10³ psi

Tensile Strength: Ultimate (UTS)

740 MPa 110 x 10³ psi

Tensile Strength: Yield (Proof)

350 MPa 50 x 10³ psi

Thermal Properties

Latent Heat of Fusion

310 J/g

Maximum Temperature: Corrosion

430 °C 800 °F

Maximum Temperature: Mechanical

1100 °C 2010 °F

Melting Completion (Liquidus)

1460 °C 2650 °F

Melting Onset (Solidus)

1410 °C 2560 °F

Specific Heat Capacity

460 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

12 W/m-K 6.9 BTU/h-ft-°F

Thermal Expansion

15 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

1.8 % IACS

Electrical Conductivity: Equal Weight (Specific)

2.0 % IACS

Otherwise Unclassified Properties

Base Metal Price

33 % relative

Density

8.1 g/cm³ 500 lb/ft³

Embodied Carbon

6.2 kg CO₂/kg material

Embodied Energy

84 MJ/kg 36 x 10³ BTU/lb

Embodied Water

200 L/kg 24 gal/lb

Common Calculations

PREN (Pitting Resistance)

Resilience: Ultimate (Unit Rupture Work)

210 MJ/m³

Resilience: Unit (Modulus of Resilience)

290 kJ/m³

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

24 points

Strength to Weight: Axial

25 points

Strength to Weight: Bending

22 points

Thermal Diffusivity

3.2 mm²/s

Thermal Shock Resistance

17 points

Alloy Composition

Among wrought stainless steels, the composition of N08367 stainless steel is notable for containing a comparatively high amount of nickel (Ni) and including copper (Cu). Nickel is primarily used to achieve a specific microstructure. In addition, it has a beneficial effect on mechanical properties and certain types of corrosion. Copper is used to improve resistance to acids, and to improve formability.

Iron (Fe)Fe		41.4 to 50.3
Nickel (Ni)Ni		23.5 to 25.5
Chromium (Cr)Cr		20 to 22
Molybdenum (Mo)Mo		6.0 to 7.0
Manganese (Mn)Mn		0 to 2.0
Silicon (Si)Si		0 to 1.0
Copper (Cu)Cu		0 to 0.75
Nitrogen (N)N		0.18 to 0.25
Phosphorus (P)P		0 to 0.040
Carbon (C)C		0 to 0.030
Sulfur (S)S		0 to 0.030