Stainless steel grade 17-7 PH is a precipitation hardened stainless steel that demonstrates high strength, hardness, excellent fatigue properties, good formability, good corrosion resistance, and minimal distortion upon heat treatment. Precipitation-hardened stainless steels have high strength and high corrosion resistances making this material well suited for aerospace applications.
17-7 PH has been a good material for use in fresh water, industrial atmospheres, as well as mild chemical and oxidizing environments. Though this material has proven useful in the aforementioned applications, 17-7 PH should not be designed into systems that come in contact with salt water.
Stainless Steel product forms offered at all 91proÊÓƵ’ locations:
Stainless Steel Grade 17-7 PH Applications:
- Various springs and washers
- Chemical processing equipment
- Heat exchangers
- Boilers
- Super-heater tubes
- Components used in high-strength and/or high-temperature conditions
DISCLAIMER: Alloy data sheets are for reference only, not for design purposes.
Chemical Composition | |||||||||
---|---|---|---|---|---|---|---|---|---|
Cr 16 – 18% | Ni 6.5 – 7.75% | Si 1% Max | Al 0.75 – 1.50% | C 0.09% Max | |||||
P 0.040% Max | S 0.030% | Fe Balance |
PHYSICAL PROPERTIES | ||||||
---|---|---|---|---|---|---|
Density | Electrical conductivity (% IACS) | Thermal conductivity (BTU-in/hr-ft²-°F) | Specific heat capacity | Thermal expansion (1/°F) | Melting Point (°F) | |
0.282 | – | 114 | – | 0.00000611 | – |
Mechanical Properties | |||||||||
---|---|---|---|---|---|---|---|---|---|
Property | Minimum | Maximum | |||||||
Yield Strength Range (Rp0.2 Offset) (ksi) | – | 140 | |||||||
Tensile Strength Range (Rm) (ksi) | – | 170 | |||||||
Elongation (AL=5 x Ø) | – | 6% | |||||||
Brinell Hardness (H) | – | – | |||||||
Modulus of Elasticity (ksi) (E): 296000 | |||||||||
Machineability General Index: – |