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.
| Fe | 82 to 85.1 | |
| Cr | 11 to 12 | |
| Mo | 2.5 to 3.0 | |
| Mn | 1.0 to 1.4 | |
| C | 0.27 to 0.32 | |
| Si | 0 to 0.5 | |
| Ni | 0 to 0.5 | |
| V | 0.2 to 0.3 | |
| P | 0 to 0.025 | |
| 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