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CW numbers simply explained

Copper materials carry a six-character number according to EN 1412. It indicates the product form and material group.

Structure using the example CW614N

CCopper
WProduct form
614Serial number
NMaterial group

The three digits are a serial number. They say nothing about the composition.

Second position: product form

Letter	Meaning
W	Wrought material: sheet, strip, bar, tube, wire, profile
C	Cast material (casting)
B	Ingot metal for remelting
F	Filler metal and brazing alloy
M	Master alloy
R	Refined copper
S	Scrap
X	Non-standardised material

Last position: material group

Letter	Material group	Example
A, B	Copper	CW004A Cu-ETP, CW024A Cu-DHP
C, D	Low-alloyed copper alloys (alloying elements below 5 %)	–
E, F	Special copper alloys (alloying elements from 5 %)	–
G	Copper-aluminium alloys (aluminium bronze)	CW306G CuAl10Fe3Mn2
H	Copper-nickel alloys	–
J	Copper-nickel-zinc alloys (nickel silver)	–
K	Copper-tin alloys (bronze)	CW452K CuSn6, CC493K Rg7
L, M	Binary copper-zinc alloys (brass)	CW508L CuZn37
N, P	Copper-zinc-lead alloys (free-cutting brass)	CW614N CuZn39Pb3
R, S	Multi-component copper-zinc alloys (special brass)	CW713R

Comparison with 2.xxxx and UNS

For copper, the former DIN material number starts with 2.0 or 2.1. UNS is the US system with C and five digits.

Copper materials from our range: EN number, designation, old DIN, material no., UNS
EN 1412	Designation	Old DIN	Material no.	UNS	At MVG
CW004A	Cu-ETP	E-Cu57 / E-Cu58	2.0060 / 2.0065	C11000	Copper E-Cu
CW024A	Cu-DHP	SF-Cu	2.0090	C12200	Sheet Semi-finished product
CW508L	CuZn37	Ms63	2.0321	C27200	Sheet Semi-finished product
CW614N	CuZn39Pb3	Ms58	2.0401	C38500	Brass Ms58
CC493K	CuSn7Zn4Pb7-C	Rg7 (G-CuSn7ZnPb)	2.1090	≈ C93200	Gunmetal Rg7

UNS: comparable US grade, not identical in every limit. The certificate supplied with the delivery is binding.

EN AW numbers for aluminium · Stainless steel grades · Tubes & bars · All materials

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