GC-CuSn7ZnPb 2.1090.04 GC-Rg7 - DIN 1705-1981

Grade	GC-CuSn7ZnPb
Germany W-Nr.	2.1090.04
Old Grade
Corresponding Standard	DIN 1705-1981 Copper-tin-alloy castings (tin bronze and gun metal castings)
Classification	Copper and Copper Alloys
Density	8.8 g/cm³

GC-CuSn7ZnPb Chemical Element Composition Content (%)

Component	Fe	P	S	Ni	Cu	Pb	Zn	Sn	Sb	Other Total
Minimum Value	-	-	-	-	81	5	3	6	-	-
Maximum Value	0.25	0.05	0.1	2	85	7	5	8	0.3	0.5

"Other individual elements or other totals": The chemical composition includes elements not specified in the table. Analysis should only be conducted if these elements are suspected to be present, or if routine analysis suggests that their content may exceed the prescribed limits.

GC-CuSn7ZnPb Mechanical Properties

Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW
≥270	≥120	≥16	HB 10 ≥70

New and Old Grade Replacement List

Corresponding Standard	Grade
DIN 1705-1981	Grade Germany W-Nr. Old Grade
DIN EN 1982-1998	Grade Germany W-Nr.
DIN EN 1982-2017	Grade Germany W-Nr.

Approximate Comparison Table Copper and Copper Alloy

Germany		European Standard
DIN EN/DIN	W-Nr.	EN	Numerical Grade
G-CuSn7ZnPb GC-CuSn7ZnPb GZ-CuSn7ZnPb	2.1090.01 2.1090.03 2.1090.04	CuSn7Zn4Pb7-C	CC493K

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!