Gnee Steel (tianjin) Co., Ltd

C7701/C7521/C7541 Germany Silver Strip

Sep 23, 2025

C7701 C7521 C7541 Copper Nickel Zinc Strip 

(Other Name: CuNi18Zn18; BZn18-18; C75200; C7521.)

 

Chemical Composition

GB ISO ASTM JIS
BZn18-18 CuNi18Zn20 C75200 C7521
BZn18-26 CuNi18Zn27 C77000 C7701
BZn15-20 CuNi15Zn21 C75400 C7541

 

GB Chemical Composition(%)
Cu Ni+Co Fe Mn Pb Zn
BZn18-18 63.0-66.5 16.5-19.5 less than 0.25 less than 0.50 less than 0.05 Balance
BZn18-26 53.5-56.5 16.5-19.5 less than 0.25 less than 0.50 less than 0.05 Balance
BZn15-20 62.0-65.0 13.5-16.5 less than 0.5 less than 0.30 less than 0.02 Balance

 

Features for Nickel Silver Strips/Copper Nickel Zinc Strips:

1) Good color
2) High toughness
3) High strength
4) High stability
5) Excellent elasticity with fine silver gloss
6) Good fatigue
7) Rust and corrosion resistance properties
8) C7521 and C7541 have very good deep-drawing performance

 

Applications

1) Shielding material for communication electronics
2) Antenna material
3) EMI-shielding material
4) Spring contact
5) Flexible terminal
6) Environmentally-friendly plating-free electronic parts and components
7) Quartz oscillator
8) High-level material
9) Electric material

copper strip
foil copper tape
copper strip for earthing
copper roof strip
 

Copper products that GNEE can provide

copper pipe

 

Product name
Copper Pipe / Tube
Round copper pipe
Wall thickness: 0.2-120mm
Outside Diameter: 2mm~910mm
Rectangular copper pipe
Wall thickness: 0.2mm~910mm
Size: 2mm*4mm~1016mm*1219mm
Hardness
1/16 hard,1/8 hard,3/8 hard,1/4 hard,1/2hard,full hard,soft,etc
Standard
GB/T5231-2001.GB/T1527-2006.JISH3100-2006, JISH3250-2006, JISH3300-2006, ASTM-B152M-06, ASTM-B187, ASTM-B75M-02, ASTM-B42-02, ASTM-B370 /ASTM-B152 etc
Material
T1,T2,C10100,C10200,C10300,C10400,C10500,C10700,C10800,
C10910,C10920,TP1,TP2,C10930,C11000,C11300,C11400,C11500,
C11600,C12000,C12200,C12300,TU1,TU2,C12500,C14200,C14420,
C14500,C14510,C14520,C14530,C17200,C19200,C21000,C23000,
C26000,C27000,C27400,C28000,C33000,C33200,C37000,C44300,
C44400,C44500,C60800,C63020,C65500,C68700,C70400,C70600,
C70620,C71000,C71500,C71520,C71640,C72200,etc.
Usage
Pressure vessels, Heat exchangers, Cotter, pins, Rivets, Radiators, Gaskets, Roofing, Gutters
Package
Standard export package,suit for all kind of transport,or as required.

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copper rod/bar

 

Material

Copper, Brass, Bronze and special copper alloy

Grade

ASTM

C10100,C11000,C12200,C21000,C22000,C23000,C24000,C26000,
C27000,C26800,C27200,C27400,C28000,C36500,C33000,C35300,
C35600,C36000,C38500,C44300,C46400,C52100,C54400,C62300,
C65500,C67500,C67600,C86300,C90700,C93200,C95400 etc.

G/B

TU1,T2,TP2,H96,H90,H85,H80,H70,H65,H63,H62,H59,HPb63-3,
HPb66-0.5,HPb62-2,HPb62-3,HPb59-3,HSn70-1,HSn62-1,QSn8-0.3, QSn4-4-4,QAl9-4,QSB-1 etc.

JIS

C 1011,C 1100,C 1220,C3604,C 2100,C 2200,C 2300,C 2400, C 2600,
C 2700,C 2680,C 2720,C 2800,C 4430,C 4640,C 5210, C 5441, CAC304 etc

BS

Cu-OFE,C 101,Cu-DHP,CZ 125,CZ 101,CZ 102,CZ 103,CZ 106,CZ 107, CZ 108,CZ 109,

CZ 123,CZ 124,CZ 121,CZ 111,CZ 133, Pb 104,
CS 101, CuSn10P etc.

DIN/ISO

CuZn5,CuZn10,CuZn15,CuZn20,CuZn30,CuZn35,CuZn33,CuZn36,
CuZn37,CuZn40,CuZn40Pb,CuZn37Pb2,CuZn36Pb3,CuZn39Pb3,
CuZn28Sn1,CuZn38Sn1,CuSn8,CuSn4Pb4Zn3,CuSi3Mn,CuZn25Al5,
CuSn10, CuSn7Zn3Pb7 etc.

Shape

Round, Square, Flat, Hexagon, Oval, Half-round or Customized

Dimension

Bar/Rod

Standard(Diameter 5-160 mm) or Customized

Wire

Standard(Diameter 0.02-6 mm) or Customized

Plate/Sheet

Standard(T 0.2-50 mm/W 200-3000 mm/L 6000 mm) or Customized

Strip

Standard(T 0.05-1.5 mm/W 20-600 mm/L 20000 mm) or Customized

Tube/Pipe

Standard(OD 3-360mm/Wall thickness 0.5-50 mm) or Customized

Standard

GB/T,JIS,ASTM, ISO, DIN, BS, NF etc.

Hardness

1/16 hard,1/8 hard,3/8 hard,1/4 hard,1/2hard,full hard.

Package

Plastic film + Wooden case or as per customer requirement

Surface

Polished,bright,oiled,hair line,brush,mirror,or as required

Deliver time

According to order's quantity.

Shipment

By sea, by air, DHL, UPS, FedEx etc. or as required

Application

Electric light industry, machinery manufacturing, Building industry ,defense industry, and other fields Manufacturing industrial

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copper plate/sheet/strip

 

Product name

Copper plate

Width

500-2000mm or as customer request

Thickness

0.2-120mm or as customer request

Length

1000-6000mm or as customer request

Processing service

Welding, stamping, cutting, bending, unwinding

Application

Widely used in electrical industry, medical equipment, construction, chemical,
food industry, agriculture, and Marine components.

Export packing

Standard Marine packaging or custom packaging

Price Terms

FOB CIF CFR,or We can also go into detail

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copper wire

 

Product Name

Copper Wire

Standard

AISI, ASTM, BS, DIN, EN, GB, JIS

Diameter

0.6mm / 0.8mm / 0.9mm / 1.0mm / 1.2mm / 1.6mm

Thinckness

0.12mm-3.0mm

Cu Content (%)

99.998%

Alu-Zinc coating

30-180g/m2

Material

C21000,C22000,C22600,C23000,C24000,C26000,C26130,C26800,C27000,C27200,C27400, etc.

Package

Standard seaworthy export packing:

3 layers of packing, inside is kraft paper, water plastic film is in the middle and outside

GI steel sheet to be covered by steel strips with lock, with inner coil sleeve

Certification

ISO, SGS, CE

Delivery

8-20 days

Payment Terms

T/T, LC, Western Union, Paypal, etc.

MOQ

1 Ton

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copper CNC machined parts

 

Processing

CNC Turning,CNC Milling,Laser Cutting,Bending,Spining,Wire Cutting,Stamping, Electric Discharge Machining(EDM),Injection Molding,3D Printing,Rapid Prototype,Moulds etc.

Materials

Aluminum:2000 series,6000 series,7075,5052,etc.

Stainlesss steel:SUS303,SUS304,SS316,SS316L,17-4PH,etc.

Steel:1214L/1215/1045/4140/SCM440/40CrMo,etc.

Brass:260,C360,H59,H60,H62,H63,H65,H68,H70,Bronze,Copper

Titanium:Grade F1-F5

Plastic:Acetal/POM/PA/Nylon/PC/PMMA/PVC/PU/Acrylic/ABS/PTFE/PEEK etc.


Surface Treatment

Anodized,Bead Blasted,Silk Screen,PVD Plating,Zinc/NickI/Chrome/Titanium Plating,
Brushing,Painting,Powder Coated,Passivation,Electrophoresis,Electro Polishing,
Knurl,Laser/Etch/Engraveetc.

Tolerance

+ / - 0 . 0 1 m m

Surface
Roughness

Min Ra 0.1~3.2

CERTIFICATE

ISO9001:2015,IOS14001:2015,ROSH.

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Why choose us?

Since our establishment in 2008, our company has specialized in the production and export of copper products. We utilize advanced production lines and a comprehensive quality control system. From raw materials to finished products, every step is rigorously inspected using precision instruments (such as spectrometers, metallographic microscopes, and conductivity testers) to ensure that our products meet international standards for composition, dimensions, and performance. We are committed to providing high-quality, high-precision copper products and reliable service to our global customers.
Email:sales@gneesteel.com

 
200+

active members

 
18+

years experience

 
35000+

Square Meters Built

 
8000+

Cooperating Partner

 

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