High Strength SUS630 Sheet ,17-4PH Cold Rolled Stainless Steel Strip,UNS S17400 Sheet,Strip
17-4 PH stainless steel strip, also called 630 precipitation hardening stainless steel strip.
17-4PH alloy is a precipitation, hardening, martensitic stainless steel composed of copper, niobium/columb.
After heat treatment, the mechanical properties of the strip product are more perfect, and can reach a compressive strength of up to 1100-1300 Mpa (160-190 ksi).
Grade 17-4 PH stainless steel strip cannot be used at temperatures higher than 300°C (572°F) or very low temperatures.
It has good corrosion resistance to the atmosphere and diluted acids or salts.
Grade 17-4PH (1.4542) is the most common example of the precipitation hardening stainless grades.
17-4PH stainless combines good corrosion resistance with high strength and good impact toughness.
17-4PH stainless grade combines the following characteristics:
- Good corrosion resistance (just below that of 304)
- High hardness and strength
- Controlled balance of mechanical properties by ageing (precipitation hardening)
- Improved toughness compared to 431 including use at sub-zero temperatures for the softer conditions
- Magnetic
- Thermal expansion comparable to carbon steel
- Easier to weld than martensitic grades like 420 and 431 stainless
17-4PH develops its high strength from the precipitation of copper particles in its martensitic matrix.
It comes in various conditions denoted by H plus ageing temperature in °F, for example H900, H1025 etc.The higher the ageing temperature, the lower is the strength and the higher are the ductility and toughness.The minimum 0.2% PS varies from 520 MPa to 1170 MPa depending on the condition.
The combination of high strength and good corrosion resistance finds uses in:
Drive shafts, bearings, gears, hydraulic rams, valve stems, load cells, bridge bearings, tensioning systems,
golf clubs, quick release pins, fasteners, aerospace, medical devices, food processing, conveying equipment,
fall arrest systems.
17-4PH stainless is the natural choice of high strength, corrosion resistant steel particularly where standard ,martensitic grades like 431 aren’t quite good enough.
17-4PH STAINLESS STEEL is the most widely used of all the precipitation-hardening stainless
steels. Its valuable combination of properties gives designers opportunities to add reliability to their products
while simplifying fabrication and often reducing costs. This valuable alloy is widely used in the aerospace,
chemical, petrochemical, food processing, paper and general metalworking industries.
17-4PH strip Grade
| ASTM, UNS | EN, DIN | JIS | GB |
| 17-4PH, S17400 | 1.4542, X5CrNiCuNb16-4 | SUS630 | 0Cr17Ni4Cu4Nb |
S17400 strip Chemical comosition ( weight % )
| C | Mn | P | S | Si | Cr | Ni | Cu | Nb |
| 0.07 max | 1.00 max | 0.040 max | 0.030 max | 1.00 max | 15.00~17.50 | 3.00~5.00 | 3.00~5.00 | 0.15~0.45 |
