Stainless Steel Grade 15-7 (UNS S15700) Supplier
Properties and Appearance
Stainless Steel Grade 15-7, also known as 15-7PH or ASTM A693, is a precipitation-hardening stainless steel alloy typically with a silvery-grey bright, metallic appearance and a smooth surface finish.
When strengthened through precipitation hardening, Grade 15-7 exhibits high strength and hardness, even at elevated temperatures. It possesses resistance to atmospheric corrosion, mild chemicals, and some organic acids. It offers good wear and fatigue resistance, making it suitable for applications subject to repeated loading / stress and it is slightly magnetic in its hardened state. Grade 15-7 maintains a good level of ductility, allowing it to be formed and fabricated easily.
The following datasheet provides an overview of stainless steel-grade 15-7.
Chemical Composition
| Element | Content (%) |
| Iron (Fe) | 74.9 |
| Chromium (Cr) | 15 |
| Nickel (Ni) | 7 |
| Molybdenum (Mo) | 2 |
| Aluminum (Al) | 1.1 |
Physical Properties
| Properties | Metric | Imperial |
| Density | 7.81g/m³ | 0.282 lb/in³ |
Mechanical Properties
| Properties | Metric | Imperial |
| Tensile Strength | 900 MPa | 131000 psi |
| Yield Strength (@ strain 0.200%) | 380 MPa | 55100 psi |
| Elastic Modulus | 190-210 GPa | 27557-30458 ksi |
| Poisson’s Ratio | 0.27-0.30 | 0.27-0.30 |
| Elongation at Break | 30% | 30% |
| Hardness, Rockwell B (converted from Brinell Hardness) | 88 | 88 |
Thermal Properties
| Properties | Metric | Imperial |
| Thermal Expansion (a21-93°C/199°F) | 9µm/m°C | 5µin/in°F |
| Thermal Conductivity (@21°C/70°F) | 15.1 W/mK | 105 BTU in/hr.ft².°F |
Fabrication and Heat Treatment
Machinability
When hardened, grade 15-7 stainless steel has good machinability.
Welding
Use common arc and resistance methods. Do not use Inert gas shielding to prevent aluminum oxidation.
Heat Treatment
Cold work solution treated material for condition C material. Heat condition C material at 482°C (900°F) for 1 h before cooling.
Heat solution treated material at 955°C (1750°F) for 10 min in A1750 condition followed. R100 condition is cooled at -73°C (-100°F) for 8 h within 1 h of treating to A1750 condition. Heat again at 510°C (950°F) for 1 h in the RH 950 condition.
Heat at 760°C (1400°F) after fabrication for 90 min in the condition T. Cool again at 13°C (55°F) for 0.5 h within 60 min. Heated at 565°C (1050°F) for 90 min in TH1050 condition. Cool in airr.
Hot Working
15-7 stainless steel hot works well. Anneal afterward to respond to heat treatment.
Cold Working
Grade 15-7 stainless steel is limited to cold working.
Annealing
Anneal at 1038°C (1900°F). Cool rapidly.
Applications
Overall, Stainless Steel Grade 15-7 offers a balanced combination of strength, corrosion resistance, and versatility, making it an excellent choice for a wide range of applications in various industries including:
- Aircraft components
- Landing gear
- Torsion bars
- Missile systems
- Springs
- Bolts and screws
- Surgical instruments
- Orthopaedic implants
- Pumps
- Valves
- Gears
- Shafts
Formats supplied:
Vulcan Metal Group supplies Stainless Steel Grade 15-7 bar, sheet, wire, extrusion, pipe, plate and tube.
Custom machined and finished parts supplied to print.
Please contact us for a quote or more on how Vulcan Metal Group can help your business.
Address
Vulcan Metal Group LLC
23888 Madison Street
Torrance, CA 90505
United States
Phone / Fax
Phone: +1 310.882.6841
Fax: +1 310.893.0579
Cage Code
8FCY8
Quality Policy: Vulcan Metal Group, LLC. supplies mission critical, special purpose materials, and products at a competitive price. The company’s quality system is registered to ISO 9001 and AS9100 and follows its principles for the governance of the business. An active continual improvement program and compliance with all applicable OSHA, federal, and state regulations is maintained.