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Grade CuZn31Si1
Germany W-Nr. CW708R
Old Grade
Corresponding Standard DIN EN 12163-1998
Copper and copper alloys – Rod for general purposes
Classification Copper and Copper Alloys
Density 8.4 g/cm3
CuZn31Si1 Chemical Element Composition Content (%)
Component Fe Si Ni Cu Pb Other Total More
Minimum Value - 0.7 - 66 - - Zn:余量
Maximum Value 0.4 1.3 0.5 70 0.8 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.
CuZn31Si1 Mechanical Properties
diameter/width across-flat
d
mm		 Mark
Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Hardness
HBW
5<d≤40 CuZn31Si1-R460 R460 ≥460 ≈250* ≥18(A11.3)，≥22(A)
5<d≤40 CuZn31Si1-H115 H115 HB: 115~145；HV: 120~150
5<d≤14 CuZn31Si1-R530 R530 ≥530 ≈330* ≥10(A11.3)，≥12(A)
5<d≤14 CuZn31Si1-H140 H140 HB: ≥140；HV: ≥145
3<d≤80 CuZn31Si1-M M No specification No specification No specification No specification
Approximate Comparison Table Copper and Copper Alloy
Germany European Standard
DIN EN/DIN W-Nr. EN Numerical Grade
CuZn31Si1 2.0490 CuZn31Si1 CW708R
CuZn31Si1 Corresponding Standards(Same grade name, different standards)
1 EN 12163-1998
CuZn31Si1 CW708R
2 DIN 17672-1-1983
CuZn31Si1 2.0490 (CuZn31Si) (SoMs68)
3 DIN EN 12163-1998
CuZn31Si1 CW708R (2.0490)
4 DIN EN 12163-2016
CuZn31Si1 CW708R
5 DIN 17671-1-1983
CuZn31Si1 2.0490 (CuZn31Si) (SoMs68)
6 DIN 17660-1983
CuZn31Si1 2.0490 (CuZn31Si) (SoMs68)
7 EN 12163-2016
CuZn31Si1 CW708R
8 DIN EN 12449-2019
CuZn31Si1 CW708R
9 EN 12449-2023
CuZn31Si1 CW708R

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