0Cr15Ni7Mo2Al (PH15–7Mo) physical properties

1. Introduction

15-7 Mo stainless steel is a precipitation-hardened stainless steel alloy featuring characteristics such as excellent corrosion resistance, good weldability, and exceptionally high strength. It also provides a combination of physiological and mechanical properties, making it an ideal material for a wide range of applications.

2. Properties

15-7 Mo stainless steel is a highly resistant, high performance alloy that provides a number of distinct advantages in comparison to other stainless steel alloys. It has a composition of Cr-15 Ni-7 Mo-2 Al (PH 15-7 Mo) and a carbon equivalent of 0.43%. The austenitic stainless steel alloy offers a wide range of properties and benefits, including high strength, good corrosion resistance, and outstanding fabrication characteristics.

The yield strength of 15-7 Mo stainless steel is quite high with a minimum of 110 ksi (758 MPa). Its ultimate tensile strength is also quite high with a minimum of 170 ksi (1172 MPa). 15-7 Mo stainless steel also has a Rockwell C hardness of 36 HRc.

The alloy has a melting range of between 1740-1790℉ (950-980℃). The machinability of 15-7 Mo stainless steel is very good; it can be machined using standard tooling techniques and machining parameters.

15-7 Mo stainless steel has an excellent corrosion resistance and is widely used in industries such as chemical, pharmaceutical, textile, and food processing due to its ability to withstand harsh environments without losing its high strength.

3.Applications

15-7 Mo stainless steel is a preferred material for critical performance applications due to its combination of strength, hardness and corrosion resistance. It is widely used in the aerospace, automotive, petrochemical, and medical industries. It is also used in the production of parts for machine tools, turbine components, nuts and bolts, valve seats, and wear plates.

This high performance steel alloy is used in the manufacture of high pressure parts such as gearboxes, compressors, fuel and oil injection systems, swing arms and heavy combat systems. Due to its excellent combination of strength and corrosion resistance, it is also used as an inexpensive alternative to nickel alloys in some aerospace and medical applications.

15-7 Mo stainless steel is also used in the production of oil and gas components, such as valves, piping, flanges, fittings, and wellheads. The alloy is also used for the manufacture of metal parts and components for industrial equipment and processes.

4.Conclusion

15-7 Mo stainless steel is a highly resistant, high-performance alloy that offers excellent corrosion resistance, high strength and good weldability. It is suitable for a variety of applications including aerospace, automotive, petrochemical, and medical. The alloy has a melting range of between 1740-1790℉ (950-980℃) and a good machinability. Due to its good combination of properties, it is often used as an inexpensive alternative to nickel alloys in some applications.

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UNS S31260 (F15–7Mo), also known as stainless steel 15–7Mo, is a precipitation-hardening stainless steel designed for applications requiring high strength, moderate corrosion resistance, and good formability.

UNS S31260 contains 15 percent chromium and 7 percent molybdenum, and is the most popular of the 15–7Mo grades. The addition of the molybdenum greatly increases the strength, while still allowing the material to be readily formed. With moderate resistance to oxidation and stress-corrosion cracking, this alloy is often employed in aerospace components, as well as nuclear and petrochemical applications.

In its annealed condition, UNS S31260 has an ultimate tensile strength of 205,000 psi (1417 MPa) and a yield strength of 135,000 psi (930 MPa). After a precipitation-hardening treatment, the strength is further increased to 270,000 psi (1862 MPa) for ultimate tensile strength and to 195,000 psi (1341 MPa) for yield strength. The material exhibits good ductility in all conditions, with 30 percent elongation in 2 in. (50.8 mm).

The resistance to corrosion of UNS S31260 is dependent on its condition. In the annealed condition, the alloy shows good resistance to general and localized corrosion in fresh water as well as mild organic, phosphoric acid and alkaline media. In the solution-treated and aged condition, the material is more resistant to general and localized corrosion in a variety of media, including salt water. The alloy is resistant to oxidation and scaling in the temperature range of 250–1400°F (121–760°C).

UNS S31260 is quite easy to machine due to its free-machining characteristics. The material is readily weldable, though welding procedure selection should be based on the condition being welded. It has good formability in all conditions as well.