If you are looking for durable, strong, and corrosion-resistant stainless steel, then stainless steel grade 17-4 PH is your best option. This type of stainless steel is used in various applications due to its strength and versatility. This blog post will discuss the properties and uses of this grade of stainless steel.
Stainless Steel Grade 17-4 PH is a precipitation-hardening martensitic stainless steel that offers high strength, hardness, superior corrosion resistance, formability, and better weldability than other grades of stainless steel. It can be heat treated to achieve a wide range of hardness levels from 40 to 65 HRC. It has an excellent combination of mechanical properties, including good strength, toughness, and fatigue resistance at temperatures up to 600F (316C).
The most common uses for this grade of stainless steel include aerospace components such as landing gear components; automotive parts such as valve springs; medical implants; food processing equipment; oil and gas industry components; and chemical processing equipment. This type of stainless steel is also often used in construction due to its durability, strength, and easy maintenance.
It has excellent corrosion resistance in fresh and saltwater environments making it ideal for marine applications such as boat fittings or dock hardware. 17-4 PH is also used to manufacture surgical instruments due to its ability to resist corrosion caused by exposure to body fluids. Its excellent machinability makes it ideal for producing precision parts with tight tolerances, such as gears or valves.
What Forms is 17-4 PH Stainless Steel Available at Piping Mart?
- 17-4 PH Stainless Steel Pipes
- 17-4 PH Stainless Steel Screw
- 17-4 PH Stainless Steel Tubing
- 17-4 PH Stainless Steel Sheet
- 17-4 PH Stainless Steel Plates
- 17-4 PH Stainless Steel Bars
17-4 PH Stainless Steel Chemical Composition
The chemical composition of 17-4 stainless steel are:
| Element | Content (%) |
|---|---|
| Iron, Fe | 73 |
| Chromium, Cr | 15.0 – 17.5 |
| Nickel, Ni | 3.0 – 5.0 |
| Copper, Cu | 3.0 – 5.0 |
| Manganese, Mn | 1.0 |
| Silicon, Si | 1.0 |
| Tantalum, Ta | 0.45 |
| Niobium, Nb (Columbium, Cb) | 0.45 |
| Nb + Ta | 0.15 – 0.45 |
| Carbon, C | 0.070 |
| Phosphorous, P | 0.040 |
| Sulfur, S | 0.030 |
17-4 PH Stainless Steel Properties
17-4 SS is a martensitic, chromium-nickel-copper precipitation-hardening stainless steel. Its main properties are high strength, good corrosion resistance, and good mechanical properties at high temperatures. It is widely used in the aerospace, chemical, and petrochemical industries.
17-4 PH Stainless Steel Physical Properties
The physical properties of 17-4 stainless steel are:
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.75 g/cm3 | 0.280 lb/in³ |
17-4 PH Stainless Steel Mechanical Properties
The mechanical properties of 17-4 stainless steel are:
| Properties | Metric | Imperial |
|---|---|---|
| Shear modulus | 77.4 GPa | 11200 ksi |
| Elastic modulus | 190-210 GPa | 27557-30458 ksi |
| Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
| Hardness, Brinell | 352 | 352 |
| Hardness, Knoop (estimated from Rockwell C) | 363 | 363 |
| Hardness, Rockwell C | 36 | 36 |
| Hardness, Vickers (estimated from Rockwell C) | 349 | 349 |
17-4 PH Stainless Steel Thermal Properties
| Properties | Metric | Imperial |
|---|---|---|
| Thermal expansion co-efficient (@ 21-93°C/69.8-199°F) | 10.8 µm/m°C | 6.00 µin/in°F |
| Thermal conductivity ( for condition H 900 at 149ºC. 22.6 W/mK for H 900 at 482ºC) | 17.9 W/mK | 124 BTU in/hr.ft².°F |
17-4 PH Stainless Steel Equivalent
Other designations that are equivalent to grade 17-4 stainless steel are listed in the following table.
| AISI 630 | ASTM A693 (630) | AMS 5342 | MIL-S-81506 |
| AMS 5604 | ASTM A705 (630) | AMS 5343 | SAE J467 (17-4PH) |
| AMS 5622 | MIL C-24111 | AMS 5344 | ASME SA705 |
| AMS 5643 | MIL P-47183 | AMS 5355 | ASME SA564 |
| ASTM A564 (630) | MIL S-81591 | AMS 5825 |
17-4 PH Stainless Steel Specifications
| Specifications |
|---|
| AMS 5643 (Bar) |
| AMS 2303 (Bar) |
| ASTM A484 (Bar) |
| ASTM A564 (Bar) |
| Project 70™ (Bar) |
| Custom 630™ (Bar) |
| AMS 5604 (Sheet & Plate) |
| ASTM A693 (Sheet & Plate) |
| UNS S17400 |
17-4 PH Stainless Steel Uses
UNS S17400 is incredibly versatile, with various services across sectors like automotive engineering, aerospace, firearms manufacturing, and energy production. This corrosion-resistant alloy is noted for its excellent strength, hardness, and high fatigue strength once it has been heat treated. It can be used to create components like jet turbine blades and aircraft fixtures, thanks to its strength and resistance to stress corrosion cracking. This same property makes it ideal for use in nuclear plants where safety-critical components are needed that won’t corrode quickly over time. Furthermore, the high hardness level allows 17-4 PH stainless steel to manufacture tools such as saw blades and ball bearings that require high wear resistance. The ability of this alloy to maintain form when exposed to large temperature changes also makes it suitable for chemical engineering work such as refining processes.
Conclusion:
In conclusion, SS grade 17-4 PH is an incredibly versatile material with many beneficial properties and applications. Its high strength and exceptional corrosion resistance make it ideal for many industries, including aerospace, automotive, medical, food processing, oil & gas, chemical processing, and construction. Its machinability makes it suitable for precision parts with tight tolerances, while its excellent weldability ensures secure connections between pieces when fabrication or repair work is needed. For these reasons and more, it is no surprise that this type of stainless steel remains one of the most popular materials today.
Meet Bhavesh, a seasoned blogger with a wealth of knowledge and experience. From metal products manufacturing to retail, Bhavesh has a diverse background in various industries and is dedicated to sharing his insights and expertise with readers.
