About Alloy
17-4PH is one of the most popular and most commonly used stainless chromium-nickel alloy steels with copper additive, precipitation hardened with martensitic structure. It is characterized by high corrosion resistance while maintaining high strength properties, including hardness.
Steel can operate in the temperature range from -29 ℃ to 343 ℃, while retaining relatively good parameters. In addition, the materials in this grade are characterized by relatively good ductility and their corrosion resistance is comparable to 1.4301 / X5CrNi18-10.
Bearing in mind that it is a precipitation hardened steel, it should be applied after supersaturation and aging. In the delivery condition +A, the products show no martensitic structure, resulting in significantly less corrosion resistance.
Steel can be welded by TIG, but the welding process requires the use of an annealed material. Otherwise the material at the joints will not retain the proper structure. Furthermore, at the expense of a slight loss of corrosion resistance, the products can be nitrided to achieve a hardened topcoat.
17-4PH, and X5CrNiCuNb16-4 / 1.4542 is provided, among others, in the form of round bars, sheets, flat bars and cold-rolled tapes.
The material is widely used in the aerospace, marine, paper, energy, offshore and food industries for heavy-duty machine components, bushings, turbine blades, couplings, screws, drive shafts, nuts, measuring devices.
Product Form & Standard
AMS 5604: Sheet, Strip Cold Rolled and Plate.
AMS 5622 :(Vac Melt) Bars (Flat, Hex, Round, Square), Wire, Forgings, Tubing and Rings
AMS 5642: Bar
AMS 5643: Bars (Flat, Hex, Round, Square), Wire, Forgings, Tubing and Rings
Chemical Composition
| Weight% | C | Si | Mn | P + S max | Cr | Ni | Cb + Ta | Cu |
| AMS 5604 17-4PH | 0.07 max | 1.0 max | 1.0 max | 0.04 P 0.03 S | 15.0 - 17.5 | 3.0 - 5.0 | 5 X C / 0.45 | 3.0 - 5.0 |
Mechanical Properties
| Material Alloy 17-4 PH Bar (AMS 5643) | ||||||||||
| Condition | Ultimate Tensile Strength (ksi) | 0.2 % Yield Strength (ksi) | Elongation % in 2D (Values are for sheet <0.1874" thick) | % Reduction of Area | Rockwell C Hardness | |||||
| Cond A | - | - | - | - | 39 max | |||||
| H900 | 190 | 170 | 10 | 40 | 40-47 | |||||
| H925 | 170 | 155 | 10 | 44 | 38-45 | |||||
| H1025 | 155 | 145 | 12 | 45 | 34-42 | |||||
| H1075 | 145 | 125 | 13 | 44 | 31-38 | |||||
| H1100 | 140 | 115 | 14 | 45 | 30-37 | |||||
| H1150 | 135 | 105 | 16 | 50 | 28-37 | |||||
| Material Alloy 17-4 PH Sheet/Bar (AMS 5604) | ||||||||||
| Condition | Ultimate Tensile Strength (ksi) | 0.2 % Yield Strength (ksi) | Elongation % in 2D (Values are for sheet <0.1874" thick) | % Reduction of Area | Rockwell C Hardness | |||||
| Cond A | - | - | - | - | 38 max | |||||
| H900 | 190 | 170 | 5 | - | 40-47 | |||||
| H925 | 170 | 155 | 5 | - | 38-45 | |||||
| H1025 | 155 | 145 | 5 | - | 35-42 | |||||
| H1075 | 145 | 125 | 5 | - | 33-39 | |||||
| H1100 | 140 | 115 | 5 | - | 32-38 | |||||
| H1150 | 135 | 105 | 8 | - | 28-37 | |||||
Application
Aerospace Industry: 17-4PH is used in the manufacturing of components for aircraft structures, landing gear, engine parts, and other aerospace applications due to its high strength-to-weight ratio and corrosion resistance.
Oil and Gas Industry: The alloy is utilized in offshore drilling equipment, valves, pumps, and other components exposed to harsh environments. Its corrosion resistance makes it suitable for offshore platforms and subsea applications.
Chemical Processing: 17-4PH is employed in chemical processing equipment such as valves, pumps, fittings, and heat exchangers due to its resistance to corrosive chemicals and high temperatures.
Medical and Dental Applications: The alloy is used in medical and dental instruments, surgical tools, orthopedic implants, and prosthetics due to its biocompatibility, strength, and corrosion resistance.
Food Processing: 17-4PH is used in food processing equipment, including conveyors, mixers, and storage tanks, where corrosion resistance and cleanliness are essential.
Nuclear Industry: The alloy is utilized in nuclear power plants for reactor components, control rod drive mechanisms, and other critical applications due to its strength, toughness, and resistance to radiation-induced damage.
Marine Applications: 17-4PH is employed in marine environments for components such as propeller shafts, fasteners, and fittings due to its corrosion resistance and high strength.
Firearms Industry: The alloy is used in the production of firearm components such as barrels, receivers, and triggers due to its high strength and resistance to wear and corrosion.
Industrial Equipment: 17-4PH finds applications in various industrial equipment, including machinery parts, gears, shafts, and couplings, where high strength and corrosion resistance are required.
Power Generation: The alloy is used in power generation equipment, including turbine blades, shafts, and generator components, due to its high strength and corrosion resistance.
Your enquiry
Can't find the information you need? Please contact us directly.