Aerospace & Defence

CEO
Hempel Special Metals provides tailored material solutions for the aerospace and defence sector, where absolute quality and reliable supply are critical to programme success. As an independent, family-owned group with a global presence, we combine decades of industry expertise with long-standing partnerships with approved mill sources, ensuring dependable access to high-performance alloys that meet the most exacting standards.
Our product portfolio includes bar, sheet, plate, strip, tube and pipe in advanced materials such as titanium, nickel alloys, stainless steels and maraging steels. These high-performance alloys are supplied in a wide range of dimensions and configurations, giving customers the flexibility and assurance required for complex aerospace and defence applications.
Through our global service centres, we provide semi-finished products prepared precisely to customer specification, supported by technical guidance and sector-specific know-how. Our aerospace accreditations, including EN 9100 and EN 9120, ensure full quality assurance, traceability and just-in-time delivery, making us a trusted partner to many original equipment manufacturers worldwide. With stringent standards, specialist expertise and proven reliability, we enable our customers to design and deliver aerospace and defence systems that perform safely and consistently.
Product Range
Titanium
| Alloy | Specifications |
|---|---|
| Grade 2 / 3.7035 | ASTM B 348, AMS 4902 |
Grade 3 / 3.7055 | AMS 4900 |
| Grade 4 / 3.7065 | AMS 4901, AMS 4921 |
| Grade 5 / 3.7164 | AMS 4928, AMS 4911 |
Ti 6-2-4-2 | AMS 4919 / 4975 |
| Ti6Al2Sn4Zr6Mo / Ti 6-2-4-6 | AMS 4981 |
| Ti 6Al-6V-2Sn / Ti 6-6-2 | |
| Grade 9 / Ti 3Al2.5V / 3.7194 | AMS 4944 / 5 |
Stainless Steel
| Alloy | Specifications |
|---|---|
| 13-8 PH / 1.4534 | AMS 5629 |
| 15-5 PH / 1.4545 | AMS 5862, AMS 5659 |
| 17-4 PH / 1.4542 | AMS 5604, AMS 5643, AMS 5622 |
A-286 | AMS 5731, AMS 5732, AMS 5734, AMS 5737, AMS 5853 |
4340 / 1.6511 | AMS 6409, AMS 6414, AMS 6415 |
52100 / 1.3505 | AMS 6440/4 |
440 C / 1.4125 | AMS 5630 |
Nickel based alloys
| Alloy | Specifications |
|---|---|
| 625 / 2.4856 | AMS 5599, AMS 5666 |
| 718 / 2.4668 | AMS 5596, AMS 5662, AMS 5663 |
X750 / 2.4669 | AMS 5542, AMS 5598, AMS 5667 |
| X / 2.4665 | AMS 5536, AMS 5754 |
| MP35N / 2.4999 | AMS 5844/5 |
Waspaloy | AMS 5708 |
Exotic Materials
| Alloy | Specifications |
|---|---|
70/30 Cu/Ni | ASTM C70600 |
90/10 Cu/Ni | ASTM C71500 |
| Invar 36 / 1.3912 | |
| Invar 42® / 1.3917 | |
| Kovar |

