17-4PH Round Bars
17-4PH Round Bars is one of the most commonly used precipitation hardened stainless steels. It contains about 17% chromium and 4% nickel with additions of copper. This type of steel has a martensitic crystalline structure in combination with a very hard and brittle structure that is due to stabilization via precipitation heat treatment. The corrosion resistance of 17-4PH is comparable to that of 304 stainless steel in most media. An excellent combination of high strength and good corrosion resistance at temperatures up to 316°C make this stainless steel extremely versatile and an effective solution for many applications.
The steel grade 1.4548, 17-4PH and the 1.4542 have similar analytical conditions, it is a stainless steel with high yield strength, high wear resistance as well as good corrosion resistance.
Due to the combination of corrosion resistance and good mechanical properties, this material 17-4PH Round Bar is also suitable for use in maritime environments. Whenever the corrosion resistance and mechanical properties of martensitic steels are insufficient. In standing seawater is vulnerable to corrosion fissures.
17-4PH Round Bar is suitable for use in maritime environments due to its combination of good mechanical properties and corrosion resistance. 17-4PH provides an excellent solution if stronger corrosion resistance and mechanical properties are required than those provided by martensitic steels. 17-4PH (UNS S17400), Type 630, is a chromium-nickel-copper precipitation-hardening martensitic stainless steel with an addition of niobium. 17-4PH combines high strength and hardness with good corrosion resistance.
AISI 630, AFNOR Z7CNU15-05, ASTM 17-4PH, UNS S17400, AFNOR Z7CNU17-04, JIS SUS630, GB 05Cr17Ni4Cu4Nb. 1.4548 is popularly known as AISI 630, SAE 630 and UNS S17400
17-4PH Chemical Composition :
| Weight % | Min. | Max. |
| C | - | 0.07 |
| Si | - | 0.07 |
| Mn | - | 1.00 |
| S | - | 0.030 |
| P | - | 0.040 |
| Cr | 15.00 | 17.50 |
| Ni | 3.00 | 5.00 |
| Cu | 3.00 | 5.00 |
| Nb+Ta | 0.15 | 0.45 |
Applications for 17-4PH Round Bars :
17-4PH Stainless Steel include components which require high hardness and/or corrosion resistance at temperatures of up to 600 °F (316 °C).
Chassis, valves, engine components, molding tools, food processing equipment, chemical processing equipment, refinery equipment, and high strength shafts.
Plant engineering, chemical industry, wood industry, offshore, shipbuilding, mechanical engineering, petroleum industry, paper industry, aerospace industry, sports and leisure industry.
- Gears
- Turbine blades
- Molding dies
- Valves and other engine components
- Aerospace — structural and parts
- Biomedical — hand tools
- Chemical Processing
- Food Process Equipment
- Gate Valves
- Mechanical Components
- Nuclear Waste Processing and Storage
- Oil and Gas Production — foils, helicopter deck platforms, etc.
- Pulp and Paper — paper mill equipment
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