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UNS S42300 (Alloy 619) Stainless Steel

S42300 stainless steel is a martensitic stainless steel formulated for primary forming into wrought products. Cited properties are appropriate for the heat treated (HT) condition. S42300 is the UNS number for this material. Alloy 619 is the common industry name.

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

The graph bars on the material properties cards below compare S42300 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

330

Elastic (Young's, Tensile) Modulus

200 GPa 29 x 106 psi

Elongation at Break

9.1 %

Fatigue Strength

440 MPa 64 x 103 psi

Impact Strength: V-Notched Charpy

13 J 9.2 ft-lb

Poisson's Ratio

0.28

Reduction in Area

22 %

Shear Modulus

77 GPa 11 x 106 psi

Shear Strength

650 MPa 95 x 103 psi

Tensile Strength: Ultimate (UTS)

1100 MPa 160 x 103 psi

Tensile Strength: Yield (Proof)

850 MPa 120 x 103 psi

Thermal Properties

Latent Heat of Fusion

270 J/g

Maximum Temperature: Corrosion

380 °C 720 °F

Maximum Temperature: Mechanical

750 °C 1380 °F

Melting Completion (Liquidus)

1470 °C 2670 °F

Melting Onset (Solidus)

1420 °C 2590 °F

Specific Heat Capacity

470 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

25 W/m-K 14 BTU/h-ft-°F

Thermal Expansion

10 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

4.5 % IACS

Electrical Conductivity: Equal Weight (Specific)

5.2 % IACS

Otherwise Unclassified Properties

Base Metal Price

9.5 % relative

Density

7.8 g/cm3 490 lb/ft3

Embodied Carbon

3.2 kg CO2/kg material

Embodied Energy

44 MJ/kg 19 x 103 BTU/lb

Embodied Water

110 L/kg 13 gal/lb

Common Calculations

PREN (Pitting Resistance)

21

Resilience: Ultimate (Unit Rupture Work)

93 MJ/m3

Resilience: Unit (Modulus of Resilience)

1840 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

39 points

Strength to Weight: Bending

30 points

Thermal Diffusivity

6.8 mm2/s

Thermal Shock Resistance

40 points

Alloy Composition

Among wrought stainless steels, the composition of S42300 stainless steel is notable for including vanadium (V) and containing a comparatively high amount of manganese (Mn). Vanadium has a strong hardening effect, but this effect is particularly sensitive to the type of tempering. Manganese is used to improve ductility at elevated temperatures. It also permits a higher nitrogen content than would otherwise be possible.

Iron (Fe) 82 to 85.1
Chromium (Cr) 11 to 12
Molybdenum (Mo) 2.5 to 3.0
Manganese (Mn) 1.0 to 1.4
Carbon (C) 0.27 to 0.32
Silicon (Si) 0 to 0.5
Nickel (Ni) 0 to 0.5
Vanadium (V) 0.2 to 0.3
Phosphorus (P) 0 to 0.025
Sulfur (S) 0 to 0.025

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

Followup Questions

Similar Alloys

Further Reading

ASTM A565: Standard Specification for Martensitic Stainless Steel Bars for High-Temperature Service

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

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