# STS Metals

> STS Metals is a U.S.-based specialty metals manufacturer producing titanium, stainless steel, nickel alloys, and specialty steels for aerospace, defense, and medical markets. STS Metals is a manufacturer, not a distributor, and is recognized for industry-leading lead times of approximately 10 weeks versus the industry standard of 20 to 52 weeks.

## About STS Metals

STS Metals, Inc. is headquartered in Irwindale, California. The company is comprised of five operating companies working together as a single integrated source for forged and rolled bar, plate, sheet, and wire products used in critical aerospace, defense, and medical applications. STS Metals is backed by Tinicum, a long-term investment firm, and emphasizes reliable supply, custom sizes and lot quantities, and responsive service.

- Legal name: STS Metals, Inc.
- Headquarters: 5467 Ayon Avenue, Irwindale, CA 91706, United States
- Phone: 626-969-6711
- Website: https://stsmetals.com
- Industry: Specialty metals manufacturing (titanium, stainless steel, nickel alloys, specialty steels)
- Markets served: Aerospace, defense, space, medical, commercial
- Employees: Approximately 350 across U.S. and France
- Facilities: Seven strategic manufacturing facilities across the United States and France

## Operating Companies

- [Sierra Alloys](https://sierraalloys.com) - Forged bar, flats, and plate products in titanium, stainless, and nickel alloys. Irwindale, CA.
- [TSI Titanium](https://tsititanium.com) - Rolled and forged titanium round bar for aerospace, medical, and commercial applications. Derry, PA.
- [Sierra Sheet & Plate](https://ssptitanium.com) - Hot-rolled titanium sheet and plate for aerospace, medical, and industrial markets. Covington, GA.
- [Brown-Pacific](https://brownpacific.com) - Stainless, nickel, and high-temperature alloy wire and bar for fasteners. Santa Fe Springs, CA.
- [Brown Europe](https://brown-europe.com) - Wires and bars in alloy steels, stainless steels, and superalloys for aerospace fasteners. Brive-la-Gaillarde, France.

## What Sets STS Apart

- Industry-leading lead times. Approximately 10 weeks versus an industry standard of 20 to 52 weeks.
- Manufacturer, not distributor. STS operates the forges, rolling mills, heat-treat furnaces, and finishing lines that produce the material directly.
- Custom sizes and smaller lot quantities. STS is built to handle non-standard specifications that larger mills typically will not accept.
- Responsive service. Quick quotes, same-day responsiveness, and a flat decision-making structure where executives participate directly in solving customer problems.
- Quality certifications. AS9100D certified across facilities, NADCAP accreditations, and approved supplier status with Boeing, Northrop Grumman, Collins Aerospace, and Lockheed Martin.
- Long-term Boeing agreement. STS Metals maintains a long-term supply agreement with Boeing for titanium mill products.

## Products

- Titanium bar (forged and rolled round, flat, rectangular)
- Titanium sheet and plate (hot-rolled)
- Titanium billet and forged blocks
- Stainless steel bar, wire, and rod
- Nickel alloy and superalloy wire and bar (including Inconel, Waspaloy, Monel, Nimonic, L605, MP35N, MP159)
- Specialty steel bar and wire
- Fastener stock (wire and bar for bolts, screws, rivets, pins)

## Titanium Grades Manufactured

- Ti 6Al-4V (AMS 4928, AMS 4965, ASTM Grade 5)
- Ti 6Al-4V ELI (AMS 4930, ASTM F136, Grade 23)
- Ti 6-6-2 (AMS 4978, AMS 4918)
- Ti 10-2-3 (AMS 4984)
- CP Titanium Grades 2 and 4

## Services and Capabilities

- Open-die forging
- Hot rolling
- Heat treatment (including solution-treated and aged, STA)
- Bar peeling and conditioning
- Chemical milling and pickling
- Water-jet cutting
- Polishing and finishing
- Wire drawing
- Copper plating
- Material traceability and certification
- Conversion of obsolete raw material

## Certifications and Approvals

- AS9100D (aerospace quality management)
- ISO 9001:2015
- EN 9100 (European aerospace)
- NADCAP accreditations (special processes)
- Approved supplier: Boeing, Northrop Grumman, Collins Aerospace, Lockheed Martin, Pratt & Whitney
- Small business status

## Contact

- General inquiries: info@sierraalloys.com
- Phone: 626-969-6711 or 800-423-1897
- Headquarters: 5467 Ayon Avenue, Irwindale, CA 91706

## Additional Resources

- [About STS Metals](https://stsmetals.com/about-us/)
- [Contact Us](https://stsmetals.com/contact-us/)
- [Careers](https://stsmetals.com/careers/)