Precision Alloys
Precision and controlled-expansion alloys
Invar 36, Invar 42, Kovar 4J29, 4J42, 4J50, 1J50 and 1J79 for dimensional stability, glass-to-metal sealing and soft magnetic parts.
Published grade data
| Grade | UNS | Werkstoff Nr. | Key strength figure | Data sheet |
|---|---|---|---|---|
| Expansion Alloy 4J50 | K94500 | - | 520 MPa / 75 ksi | Open data sheet |
| Invar 36 / 4J36 | K93600 | 1.3912 | 490 MPa / 71 ksi | Open data sheet |
| Invar 42 (4J42) | K94100 | - | 490 MPa / 71 ksi | Open data sheet |
| Kovar 4J29 | K94610 | 1.3981 | 517 MPa / 75 ksi | Open data sheet |
| Soft Magnetic Alloy 1J50 | K94490 | - | 450 MPa / 65 ksi | Open data sheet |
| Soft Magnetic Alloy 1J79 (Permalloy 80) | K94840 | - | 550 MPa / 80 ksi | Open data sheet |
Grades in this family
Expansion Alloy 4J50
Expansion Alloy 4J50 · UNS K94500 · GB 4J50 Typical applications: Hard glass and mica sealing components.
Invar 36 / 4J36
Invar 36 · UNS K93600 · W. Nr. 1.3912 · GB 4J36 · Ni36 · Fe-Ni36 Typical applications: LNG carrier membrane tanks, cryogenic piping supports and transfer line components.
Invar 42 (4J42)
Invar 42 (4J42) · UNS K94100 · GB 4J42 Typical applications: Soft glass and ceramic sealing components.
Kovar 4J29
Kovar 4J29 · UNS K94610 · W. Nr. 1.3981 · GB 4J29 Typical applications: Glass-to-metal and ceramic-to-metal hermetic seals.
Soft Magnetic Alloy 1J50
Soft Magnetic Alloy 1J50 · UNS K94490 · GB 1J50 Typical applications: Transformer and inductor laminations.
Soft Magnetic Alloy 1J79 (Permalloy 80)
Soft Magnetic Alloy 1J79 (Permalloy 80) · UNS K94840 · GB 1J79 Typical applications: Current transformers, instrument transformers and sensors.
Available product forms
- Forged flanges to ASME B16.5 and B16.47
- Seamless pipe and tube to the applicable ASTM / ASME pipe specification
- Butt weld elbows to ASME B16.9 and MSS SP-43
- Tees, reducers, caps and stub ends to ASME B16.9