15-5ph Stainless Steel Bar Benefits

 


15-5ph Stainless Steel Bar Benefits

Forgings made from 15-5 PH steel are available with the fastest lead times in the industry. We can manufacture custom forgings up to 4,000 pounds, from 2.5″ to 24″ in diameter or thickness, and up to 12′ in length, based on your specifications. A forging is ideal for long-run or short-run production, as well as prototyping purposes.

Stainless Steel 15-5 PH Properties

The 15-5 PH stainless steel is a martensitic precipitation hardening steel which offers both high strength as well as high hardness. The corrosion resistance of this steel is greater than that of straight chromium grades, such as 410, and it is comparable to that of chromium-nickel steels.

The 15-5 PH stainless steel is capable of excellent transverse notch toughness and ductility as well as very good uniformity of properties. At high temperatures (up to 1,100°F/593°C), it exhibits exceptional resistance to oxidation. Chemically balanced, this material has an almost completely ferrite-free microstructure, which makes it suitable for forming into crucibles and forgings due to its high degree of workability.

Characterization

Precipitation-hardening steels are classified into one of three groups based on their final microstructures after heat treatment, which are determined by the precipitation-hardening process. There are three kinds of stainless steel, or martensitic (for example, 17-4 PH), semi-austenitic (for example, 17-7 PH), and austenitic (for example, A-286).

Martensitic Alloys

Martensitic precipitation hardening stainless steels have a predominantly austenitic structure after annealing at temperatures that range from around 1040 to 1065 °C, which corresponds to a high annealing temperature. As soon as they are cooled to room temperature, they undergo a transformation that causes austenite to be transformed into martensite upon cooling.

Semi-austenitic Alloys

A semi-austenitic precipitation hardening steel with an annealed surface is not as hard as a martensitic precipitation hardening steel, and it can be cold worked. At room temperature, semi-austenitic steels retain their austenitic structure, but when extremely low temperatures are reached, they will form martensite, which is a very hard material.

Austenitic Alloys

The austenitic precipitation hardening steels retain their austenitic structure even after they have been annealed and hardened through ageing. A precipitation hardening phase will become soluble at the annealing temperature of 1095 to 1200°C, but not below 1095°C. The solution remains in solution even when it is rapidly cooled. When reheated to 650°C to 760°C, precipitation occurs as a result of the heating. The material becomes harder and stronger as a result of this process. The hardness of these steels remains lower than that of martensitic or semi-austenitic precipitation hardening steels. There is no magnetic property to austenitic alloys.

Strength

A precipitation-hardening stainless steel has yield strengths that range from 515 MPa to 1415 MPa. The tensile strength of this material ranges from 860 MPa to 1520 MPa. The elongation ranges from 1 to 25%. A cold working process can be used before ageing in order to facilitate even greater strengths.

 

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