EN Alloys Numbering System
The system uses 6 characters.
The first character is a C for Copper-based alloys.
The second character is a letter from the table below.
The third, fourth and fifth characters comprise a 3-digit number, which with a sixth character (a letter) indicate the alloy group. These number series and corresponding letters are also shown in the table below.
An example is CW614N.
Character/Digits | Key | B | Ingot for re-melting to produce cast products |
C | Cast Products |
F | Filler Materials for Brazing and Welding |
M | Master Alloys |
R | Refined Unwrought Copper |
S | Scrap |
W | Wrought Products |
X | Non-Standardised Materials |
000 to 099 A or B | Pure Copper |
100 to 199 C or D | Copper Alloys with less than 5% added elements |
200 to 299 E or F | Miscellaneous Copper Alloys with more than 5% added elements |
300 to 349 G | Copper-Aluminium Alloys |
350-399 H | Copper-Nickel Alloys (Cupro-Nickel) |
400 to 449 J | Copper-Nickel-Zinc Alloys |
450 to 499 K | Copper-Tin Alloys |
500 to 599 L or M | Copper-Zinc Alloys - Binary |
600 to 699 N or P | Copper-Zind-Lead Alloys |
700 to 799 R or S | Copper-Zinc Alloys - Complex |