Chemical Composition (%)
| Be | 1.8~2.1 |
|---|---|
| Ni | 0.2~0.4 |
| Cu | Balance |
Mechanical & Physical Properties
| Tensile strength | 1200~1400 MPa (solution treated and aged) |
|---|---|
| Hardness | 380~420 HV |
| Density | 8.3 g/cm³ |
| Electrical conductivity | 15.7~28 %IACS |
Typical Applications
Grade Overview
A precipitation-hardening beryllium copper used for precision springs, elastic elements, moulds, spark-proof tools and non-magnetic parts. After solution treatment and ageing, tensile strength reaches 1200-1400 MPa with hardness of about 380-420 HV; the alloy combines excellent elasticity, non-magnetic behaviour and corrosion resistance with electrical conductivity of about 15.7-28% IACS, making it one of the best all-round copper alloys. Its drawbacks are significant: it contains beryllium, whose dust and fume are toxic, the material is expensive, processing demands strict protection, and cold forming and heat treatment call for close process control. It is heavily used for precision elastic elements and non-magnetic spark-proof tooling. Provide ventilation and dust extraction and personal protection during machining, collect swarf and dust separately, avoid inhalation or skin contact, and control the ageing schedule to the required properties. Because the alloy is supplied in several tempers and responds strongly to ageing, finished properties depend as much on heat treatment as on composition, and the required strength should be agreed with the supplier.
Data compiled from current standards; for selection reference only. Ordering is subject to the standard and the mill certificate.