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Precipitation hardening stainless steel refers to the chemical composition of stainless steel on the basis of adding different types and quantities of strengthening elements, precipitation hardening process precipitation of different types and quantities of carbides, nitrides, carbon-nitrides and intermetallic compounds, not only to improve the strength of the steel but also to maintain sufficient toughness of the class of High strength stainless steel, referred to as PH steel.
Precipitation hardening stainless steel can be divided into the following three categories according to the metallurgical organization of its matrix:
Martensitic type: with high strength and hardness, but relatively low toughness.
Semi-austenitic: in the austenitic matrix distributed with a certain amount of martensite phase, the overall performance is better.
Austenitic type: has good plasticity and toughness, and at the same time has a high strength.
The main feathers of PH stainless steel sheet as follow:
High strength: precipitation hardening stainless steel has high yield strength and tensile strength, much higher than ordinary stainless steel.
Good toughness: despite the high strength, but precipitation hardening stainless steel can still maintain sufficient toughness to avoid brittle fracture in the force.
Excellent corrosion resistance: precipitation hardening stainless steel has good corrosion resistance, can resist a variety of corrosive media.
Good processing performance: precipitation hardening stainless steel can be formed and processed by cold working, hot working and welding.
| Type | Grade | Grade | Chemical Component % | ||||||||||
| C | Cr | Ni | Mn | P | S | Mo | Si | Cu | N | Other | |||
| PH | 630 | 17-4PH | ≤0.07 | 15.00-17.50 | 3.00-5.00 | ≤1.00 | ≤0.035 | ≤0.030 | - | ≤1.00 | 3.00-5.00 | - | Nb 0.15-0.45 |
| 631 | 17-7PH | ≤0.09 | 16.00-18.00 | 6.50-7.50 | ≤1.00 | ≤0.035 | ≤0.030 | - | ≤1.00 | ≤0.50 | - | Al 0.75-1.50 | |
| 632 | 15-5PH | ≤0.09 | 14.00-16.00 | 3.50-5.50 | ≤1.00 | ≤0.035 | ≤0.030 | 2.00-3.00 | ≤1.00 | 2.5-4.5 | - | Al 0.75-1.50 | |
Steel plate and plate cut from coil can be used in a variety of industries and applications, as it is a very versatile and commonly used form of steel.
used to manufacture aircraft shells, structural components, pressure vessels and components for missiles, etc..
Used to manufacture engine parts, springs, fasteners, etc.
Used in the manufacture of reactors, tanks, pipelines and other corrosion-resistant equipment.
can be used for ships, offshore platforms and coastal facilities, as well as piping systems and heat exchangers in desalination systems
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