17-7PH Stainless Steel Plate Hot Rolled 3.0 - 40.0mm SS Plate
Custom Laser Cutting
| Products | 17-7PH Stainless Steel Plate |
| Standard | ASTM JIS GB EN DIN |
| Thickness | 3.0 - 40.0mm |
| Width | 1000mm 1219mm 1500mm 2000mm or custom as request |
| Length | 2000 - 6000mm or as request |
| Surface | NO.1 |
| Service | Cutting, Bending. Surface Finishing |
| MOQ | 1 Ton |
| Loading Port | Shanghai Port, Ningbo Port |
| Packing | wooden pallets and waterproof paper |
| Other Grade | 201 202 301 304 304L 304H 309S 310S 316L 316Ti 317L 347 321 2205
2507 904L 409L 410 420 430 431 436 439 441 444 440A/B/C.etc |
| Brand | TISCO BAOSTEEL JISCO LISCO |
17-7 PH is a precipitation-hardened stainless steel that is well
suited for aerospace and other applications requiring high strength
and good corrosion resistance and formability. Type 17-7 PH is a
Chromium-Nickel-Aluminum, austenitic stainless steel. It is the
most formable of all PH grades and has the highest strength and
hardness. It is less magnetic than other PH grades and offers
minimal distortion upon heat treatment. This material maintains its
valuable properties at temperatures up to 800° F (427° C).
Stainless Steel 17-7PH is available in three conditions – RH 950
and TH 1050, which can be hardened to high strength levels with
simple heat treatments, and CH 900 which should be used in
high-strength parts where excellent ductility and workability is
not required.
We offers Stainless Steel 17-7PH in four sub-type specifications
and multiple shapes/forms:
- AMS 5528 (Plate, Sheet, and Strip)
- AMS 5529 (Sheet and Strip)
- AMS 5568 (Tubing)
- AMS 5644 (Bar and Forging)
Chemical Composition of Stainless Steel 17-7PH
| Element | min | max |
| Carbon, C | — | 0.09 |
| Manganese, Mn | — | 1 |
| Silicon, Si | — | 1 |
| Sulfur, S | — | 0.030 |
| Phosphorus, P | — | 0.040 |
| Chromium, Cr | 16 | 18 |
| Aluminum, Al | 0.75 | 1.50 |
| Nickel, Ni | 6.50 | 7.75 |
| Iron, Fe | — | *Balance |
*Not exclusively to the element mentioned, but that one
predominates other elements that are used only in minimal
quantities.
Fabrication and Working Instructions
Stainless Steel 17-7PH hardens rapidly during heat treatment and
requires intermediate annealing in deep drawing or in forming
intricate parts. In some conditions, like Condition C, for example,
this steel can be very hard and strong, which means that advanced
fabrication techniques for such materials should be used.
As for machining, special care must be applied to the speed at
which the parts are machined. 17-7PH Stainless Steel can display
long gummy chips during machining, and therefore slower speeds are
recommended, accompanied by constant feeds.
17-7PH Stainless Steel can be welded by all conventional fusion and
resistance techniques. However, if optimum mechanical properties
are wanted, special care is recommended to find the best
heat-treated conditions that should be done during the welding. The
following heat treatments of the welded part are also essential for
excellent mechanical properties. More precisely, austenite
conditioning and precipitation hardening are mandatory after the
welding is finished to obtain high strength.
Overall, 17-7PH is not as weldable as 17-4PH Stainless Steel. The
reason for this is the high concentration of Aluminum, which
deteriorates penetration of the weld, thus creating a bond that is
not as strong. Weld slug formation can also be worsened during arc
welding, which is another area that requires special care.
Mechanical Properties of 17-7PH stainless steel
| Property | Value |
| Tensile Strength | 170000 psi |
| Yield Strength | 140000 psi |
| Modulus of Elasticity | 29600 ksi |
| Poisson’s Ration | 0.27 – 0.30 |
| Elongation at Break | 6% |
| Hardness, Rockwell C | 38 |
Thermal Properties
| Property | Value |
| Thermal Conductivity | 114 BTU in/hr.ft2.°F |
| Thermal Expansion co-efficient | 6.11 µm/m°C |
Heat Treatment
Stainless Steel 17-7PH can be heat treated and annealed in electric
furnaces, radiant tube furnaces that work both on oil and gas, and
vacuum furnaces. The use of furnaces that use oil or natural gas
fire is not recommended. Given the fact that 17-7PH doesn’t work
well in reducing environments, heat treatment, and annealing in
such atmospheres should be avoided. These atmospheres may be
responsible for nitriding of the surface. If bright annealing is
required, dry hydrogen, argon or helium atmosphere can be used at
cooling rate of -65° F (-54° C).
Depending on the condition, different heat treatments of 17-7PH are
recommended:
- Condition A – mill Annealed at 1950 ± 25° F (1066 ± 14° C).
- Condition A1750 – mill Annealed at 1950 ± 25° F (1066 ± 14° C),
then heat to 1750 ± 15° F (954 ± 8° C) for 10 minutes and air cool
to room temperature.
- Condition T – mill Annealed at 1950 ± 25° F (1066 ± 14° C), then
heat to 1400 ± 25° F (760 ± 14° C) and hold for 90 minutes.
Finally, cool to 60° F (16° C) within 1 hour and hold for 30
minutes.
- Condition TH 1050 – mill Annealed at 1950 ± 25° F (1066 ± 14° C),
then heat to 1400 ± 25° F (760 ± 14° C) and hold for 90 minutes.
Next, cool to 60° F (16° C) within 1 hour and hold for 30 minutes.
Finally, heat to 1050 ± 10° F (566 ± 5.5° C) and hold for 90
minutes, then air cool to room temperature.
- Condition R 100 – mill Annealed at 1950 ± 25° F (1066 ± 14° C),
then heat to 1750 ± 15° F (954 ± 8° C) for 10 minutes and air cool
to room temperature. Within 1 hour, start cooling to -100 ± 10° F
(73 ± 5.5° C) and hold for 8 hours before air warming to room
temperature.
- Condition RH 950 – the same as Condition R 100 only with added
precipitation hardening at 950 ± 10° F (510 ± 5.5° C) for 60
minutes and then air cooling to room temperature.
