17-7 PH Stainless Steel

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Applications

Springs, Rings, Washers, Heat Exchangers, Tubing

Description

17-7 PH is a precipitation-hardening stainless steel that provides high strength and hardness, excellent fatigue properties, good corrosion resistance, good formability, and minimum distortion upon heat treatment. It is easily formed in the annealed condition, then hardened to high strength levels by simple heat treatments to Conditions RH 950 and TH 1050. The exceptionally high strength of Condition CH 900 offers many advantages where limited ductility and workability are permissible. Corrosion resistance in Conditions TH 1050 and RH 950 is generally superior to that of standard hardenable chromium stainless steels such as Types 410, 420 and 431. Corrosion resistance in Condition CH 900 approaches that of Type 304 in most environments.

Industries Supplied

Chemical Processing, Aerospace, Automotive

Nominal Composition

C: 0.09 max
Mn: 1.00 max
Si: 1.00 max
P: 0.040 max
S: 0.030 max
Cr: 16.0 – 18.0
Ni: 6.5 – 7.8
Al: 0.75 – 1.50
Fe: Balance

Physical Properties

Density:
0.282 lb/in³, (7.81 g/cm³)
0.277 lb/in³, (7.67 g/cm³)

Modulus of Elasticity (E):
At 70°F (20°C): 29.5 x 10³ ksi (200 GPa)

Modulus of Rigidity (G)
At 70°F (20°C):  10.5 x 10³ ksi (72 GPa)

Coefficient of Expansion:
9.5 µin/in.-°F at 70-600°F (17.1 µm/m-°C at 21-316°C)
6.4 µin/in.-°F at 70-600°F (11.5 µm/m-°C at 21-316°C)

Electrical Resistivity: 80.0 µohm-in, (83.8 µohm-cm)

Thermal Conductivity:
114 Btu-in/ft²hr-°F at 300°F
16.4 W/m-°C at 149°C

Applicable Specifications

Strip and Foil: AMS 5528, AMS 5529, ASTM A693, ASTM F899, MIL-S-35043

Typical Mechanical Properties

• Annealed
  • Heat Treatment: 1900-2050°F (1038-1121°C)
  • Tensile Strength: 150 ksi max (1034 MPa)
  • Suggested Operating Conditions: up to 900°F (482°C)
• Spring Temper
  • Heat Treatment: (Stress relieve as needed)
  • Tensile Strength: 200 ksi min (1380 MPa)
  • Suggested Operating Conditions: up to 650°F (343°C)
• Spring + Aged (CH 900)
  • Heat Treatment: 900°F (482°C) for 60 mins
  • Tensile Strength: 240 ksi min (1650 MPa)
  • Suggested Operating Conditions: up to 650°F (343°C)

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For further information Contact:

Contact Us
Phone: 1 888 843 2350
Elgiloy Specialty Metals – Strip Products
1565 Fleetwood Dr.
Elgin, IL 60123 USA

Limitation of Liability and Disclaimer of Warranty:

• The content in these data sheets is provided primarily by third-party melting mills and is provided for reference only.  It is not intended for engineering or design.
• Applications may be discussed, however, Elgiloy Specialty Metals, a Division of Combined Metals Company LLC, does not recommend or endorse any material for any particular end use or application.
• The data included in this data sheet are typical values and may vary.
• Elgiloy Specialty Metals, a Division of Combined Metals Company LLC, makes no representations or warranties, express or implied, as to the accuracy, completeness, condition, suitability, performance, fitness for a particular purpose, or merchantability of any information contained in any data sheet.

In no event will Elgiloy Specialty Metals, a Division of Combined Metals Company LLC, be liable for any damages whatsoever arising from the use of the information included in the data sheets.