US2025059630A1PendingUtilityA1
Components For Drinking Water Pipes, And Method For Manufacturing Same
Est. expiryJan 18, 2042(~15.5 yrs left)· nominal 20-yr term from priority
B22D 21/025C22F 1/08C22C 9/04
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Claims
Abstract
A Cu—Zn—Si alloy having low lead content is described, along with components such as plumbing fittings suitable for drinking water pipes, and methods of manufacturing same are described.
Claims
exact text as granted — not AI-modified1 . A Cu—Zn—Si alloy consisting of the following components in weight percent:
11.
≤
Zn
≤
13.
;
2.5
≤
Si
≤
3.7
;
0.1
≤
Fe
≤
0.5
;
0.1
≤
Mn
≤
0.2
;
wherein the sum of the weight percentage of Zn, [Zn] , and ten times the weight percentage of Si, [Si] , amounts to a combined weight percentage Q,
where Q=[Zn]+(10×[Si]),
wherein 36≤Q≤48;
wherein the Cu—Zn—Si alloy comprises in weight percent no more than 0.05% Ni;
wherein the Cu—Zn—Si alloy comprises no more than 0.2 wt % Al;
wherein the Cu—Zn—Si alloy comprises no more than 0.03 wt % P;
wherein the alloy includes unavoidable impurities in an amount of 0.53 wt % or less, wherein said impurities contain no more than 0.2 wt % Sn, and no more than 0.06 wt % Pb; and
wherein the balance is copper
said Cu—Zn—Si alloy having a tensile strength as determined in accordance with ISO 6892-1:2009 of 300 MPa or more and
said alloy having an elongation at fracture of 30% or more as determined in accordance with ISO6892-1:2009.
2 . The Cu—Zn—Si alloy according to claim 1 , wherein the Cu—Zn—Si alloy comprises in weight percent: 2.5≤Si≤3.5.
3 . The Cu—Zn—Si alloy according to claim 1 , wherein 2.5≤Si≤3.2; and where 36≤Q≤47.
4 . The Cu—Zn—Si alloy according to claim 1 , wherein 2.7≤Si≤3.5; and where 37≤Q≤48.
5 . The Cu—Zn—Si alloy according to claim 1 , wherein 11.5≤Zn≤13.0.
6 . The Cu—Zn—Si alloy according to claim 1 , wherein said Cu—Zn—Si alloy is free of As and/or Sb.
7 . A component for drinking-water pipes comprising the Cu—Zn—Si alloy as claimed in claim 1 .
8 . (canceled)
9 . The component for drinking-water pipes according to claim 7 , wherein said alloy has a density in the range of from 8.0 kg/m 3 to 8.29 kg/m 3 .
10 . A method for manufacturing a component for drinking-water pipes comprising:
(i) providing a Cu—Zn—Si alloy consisting of the following in weight percent:
11.
≤
Zn
≤
13.
;
2.5
≤
Si
≤
3.7
;
0.1
≤
Fe
≤
0.5
;
0.1
≤
Mn
≤
0.2
;
wherein the sum of the weight percentage of Zn, [Zn] , and ten times the weight percentage of Si, [Si] , amounts to a combined weight percentage Q,
where Q=[Zn]+(10×[Si]),
wherein 36≤Q≤48;
wherein the Cu—Zn—Si alloy comprises in weight percent no more than 0.05% Ni;
wherein the Cu—Zn—Si alloy comprises no more than 0.2 wt % Al;
wherein the Cu—Zn—Si alloy comprises no more than 0.03 wt % P;
wherein the alloy includes unavoidable impurities in an amount of 0.53 wt % or less, wherein said impurities contain no more than 0.2 wt % Sn, and no more than 0.06 wt % Pb; and
wherein the balance is copper;
said Cu—Zn—Si alloy having a tensile strength as determined in accordance with ISO 6892-1:2009 of 300 MPa or more; and
said alloy having an elongation at fracture of 30% or more, as determined in accordance with ISO6892-1:2009; and
(ii) processing said alloy to form said component.
11 . The method of claim 10 , wherein step (ii) includes continuous casting said alloy, and/or wherein step (ii) includes one or more metal forming steps.
12 . The method of claim 10 , wherein step (ii) includes gravity casting said alloy.
13 . The method of claim 10 , wherein step (ii) includes one or more metal forming steps.
14 . The method of claim 10 , wherein step (ii) further includes one or more machining steps.
15 . The method of claim 10 , wherein the Cu—Zn—Si alloy has a tensile strength as determined in accordance with ISO 6892-1:2009 of 350 MPa or more.
16 . The method of claim 10 , wherein the Cu—Zn—Si alloy has a density in the range of from 8.0 kg/m 3 to 8.29 kg/m 3 .Join the waitlist — get patent alerts
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