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17-7Ph

 

We are professional 17-7Ph material factory from China
17-7Ph is A precipitation hardenable chromium-nickel-aluminum stainless steel combining high strength, moderate corrosion resistance and properties
We could supply 17-7Ph Stainless Steel in following forms:
Forging:Forged Rings,Forged Pipes,Rolled Rings,Forging Sleeves,Forging Disks,Forged Bushings,Forging Sleeves,Forged Tube Sheets,Forged Shafts,Forged Valve Parts(Valve Bodies,Valve seat rings,valve bonnets) and so on
Sheet,Plate,Strips,Coils
Bar:Round Bars,Square bars,flat bars,hollow bars,hex bars and so on
Pipe & Tube:Seamless tubes,seamless pipes,welded pipes,welded tubes,tubings,coiled tubes,U-bend Tubes.
pump shaft,fasteners, couplings, screws, bushings, studs, fittings, valve stems, roller, wear rings
Wire:welded wires,wire rods
Flanges:in slip-ons,blinds,weld-necks,lapjoints,long welding necks,socket welds
Fasteners:bolts,screws,nuts,studs,Washers,Sockets,pins
Cnc Machining Parts,CNC turning parts,CNC Stamping parts
17-7 Ph's chemical Composition is as follows:

 

 

Aluminum

 

0.75 - 1.5

Carbon

 

0.09 max

Chromium

 

16 - 18

Iron

 

Balance

Manganese

 

1 max

Nickel

 

6.5 - 7.75

Phosphorus

 

0.04 max

Silicon

 

1 max

Sulphur

 

0.04 max

Following is mechanical property of 17-7Ph

Properties

Metric

Tensile strength

1170 MPa

Yield strength

965 MPa

Modulus of elasticity

204 GPa

Poisson’s ratio

0.27-0.30

Elongation at break

6%

Hardness, Rockwell C

38

Following is production standard of 17-7ph
AMS 5628, AMS 5644, AMS 5673, AMS 5678, AMS 56229
ASTM A564 Grade 631, ASTM A693 Grade 631, ASTM A705 Grade 631
Stainless steel grade 17-7 PH is solution annealed at 1177°C (2150°F) for 4 h and air cooled. Same step is performed at 1079°C (1975°F) for 4h and air cooled, then at 843°C (1550°F) for 24h and air cooled, and at 760°C (1400°F) for 16h and air cooled. This completed the precipitation hardening process. For excellent results and performance, the material should be clean and free from scale and impurities.
17-7 PH provides corrosion resistance in conditions TH 1050 and RH 950 is generally superior to that of the standard hardenable chromium types of stainless steels such as Types 410, 420 and 431, but is not quite as good as chromium-nickel Type 304. Corrosion resistance in Condition CH 900 approaches that of Type 304 in most environments.
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