17-4 PH stainless steel is a martensitic chromium nickel copper stainless steel that has undergone solution treatment (annealing). Through precipitation-hardening heat treatment, it can be further hardened to various strength levels, thereby minimizing scaling and deformation.
Within the operating temperature range of up to 600 ° F to 800 ° F, its strength and moderate corrosion resistance are maintained. This alloy should not be used under solution treatment (annealing) conditions.
17-4 PH is a multifunctional material that can be used for bars, wires, forgings, pipes, rings, plates, and strips.
17-4 PH stainless steel is suitable for various applications in commercial, petroleum, natural gas, food processing, aerospace, chemical, petrochemical, and nuclear industries.
17-4 PH has good manufacturing characteristics and can be age-hardened through a one-step low-temperature treatment. It is suitable for complex parts that require corrosion resistance and high strength. Due to its precipitation-hardening ability, it can undergo heat treatment and welding with minimal deformation.
17-4 PH Stainless Steel Standard Specifications
AMS 5604 Sheet, Strip, and Plate
AMS 5643 and 5622 Bars (Flat, Hex, Round, Square), Wire, Forgings, Tubing and Rings
ASTM A 693 Plate, Sheet, and Strip
UNS: S17400
17-4 DBLE H1150
ASTM A 564 T 630 Cond H1150D
NACE MRO175/ISO 15156-3
17-4PH Cond H 1150
ASTM A 564
17-4PH Sol
AMS 5643
ASTM A 484
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
MIL-S-25043
ASTM A564 Grade 630
ASTM A484 / ASME SA484
ASTM A564 / ASME SA564
ASTM A693 / ASME SA693 Plate, Sheet, and Strip
WS 1.4542
X5CrNiCuNb16-4
AFNOR Z6CNU1704
UNS S17400
Specifications of 17-4PH Stainless steel bar
| Product Name | 17-4PH S17400 Stainless steel bar/rod / Stainless steel round bar |
| Specifications | ASTM A564, A484, AMS 5604, 5622, 5642, 5643, 17-4PH, UNS S17400, SUS 630 |
| Standards | ASTM, SAE, EN, DIN, JIS, ISO, KS, NF, ISC, GB |
| Length | Customized according to customer requirements |
| Diameter | Within 700mm |
| Application | Kitchenware, home appliances, construction decoration, stairs, refrigerated containers,burner parts, exhaust parts of auto |
Equivalent grades
| SAE | JIS | NF | DIN | UNS | GB | ASTM | ISO | KS | EN | ISC |
|---|---|---|---|---|---|---|---|---|---|---|
| 17-4PH | SUS 630 | Z6CNU17-04 | 1.4542 | S17400 | 0Cr17Ni4Cu4Nb | 630 | X5CrNiCuNb 16-4 | STS 630 | X5CrNiCuNb 16-4 | S51740 |
Chemical composition
| Element | Percentage |
| C | 0.07 max |
| Cu | 3 - 5 |
| Cr | 15 - 17.5 |
| Fe | 73 |
| Mn | 1 max |
| Nb + Ta | 0.15 - 0.45 |
| Nb | 0.45 max |
| Ni | 3 - 5 |
| P | 0.04 max |
| S | 0.03 max |
| Si | 1 max |
| Ta | 0.45 max |
Physical Properties
| Attributes | Annealed | -H900 |
|---|---|---|
| Density | 0.280 lb/in3 | 0.282 lb/in3 |
| Ultimate Tensile Strength | 160 ksi | 210 ksi |
| Yield Tensile Strength | 145 ksi | 200 ksi |
| Fatigue Strength | N/A | 98 ksi |
| Shear Strength | N/A | 120 ksi |
| Shear Modulus | N/A | 11,000 ksi |
| Hardness Rockwell | Brinell | C36 | 363 | C40-47 | 388-444 |
| Elongation at Break Percentage | 6-15% | 12% |
| Reduction of Area | 30-60% | 35-40% |
| Modulus of Elasticity | N/A | 28,000 ksi |
| Poisson's Ratio | 0.28 | 0.28 |
| Machinability Percentage | 45% | N/A |
| Melting Point | 2,550-2,620 °F | 2,550-2,620 °F |
| Specific Heat | 1.1 x 10^-1 BTU/lb-°F | 1.1 x 10^-1 BTU/lb-°F |
| Thermal Conductivity | 116 BTU-in/hr-ft^2-°F | 116 BTU-in/hr-ft^2-°F |
| Electrical Conductivity | 2.3% IACS | 2.3% IACS |
Weldability:
effectively welded using the most popular resistance and fusion welding techniques.
It is not recommended to utilize oxygen acetylene welding for connections.
Preheating is usually not necessary.
There must be a 248 °F upper limit on the interlayer temperature.
The weld can become more resilient after undergoing a full heat treatment.
Use at high temperatures:
Excellent properties as an antioxidant, able to withstand temperatures as high as 1100 °F.
Toughness under precipitation-hardening circumstances may decrease with prolonged exposure to high temperatures.
Hot-forming processing:
As you forge, heat the metal uniformly to 2150–2200 °F and hold it there for 30 minutes for each inch.
Hot forming works best at temperatures between 650 and 900 °F as long as the steel doesn't lose its austenitic properties.
The ideal temperature range for hardening processes is 1875–1925 °F, which requires reheating the forgings.
In order to guarantee grain refinement, cool the forging below 90 °F.
Cold Forming in Processing:
Due to the material's extreme hardness during the annealing (solution treatment) process, alloy 17-4 can only be used in mild operations.
The material needs to be heat treated to H1150 conditions in order to undergo severe cold processing. This will lessen the chance of a rupture.
Generally, more than 7T of bending radius is needed.
Reading at the precipitation hardening temperature is advised to increase the stress corrosion resistance following cold forming.
Machinability:
It can be processed in both precipitation hardening and solid solution treatment settings.
Depending on how hard the material is, different processing requirements may apply.
Typically, high-speed cutting instruments are utilized, or better still, conventional lubricated hard alloy cutting instruments.
