International: UNS C51900, CDA 519, CuSn6 (EN Standard)
Chinese: QSn6.5-0.1 (GB/T 4423-1992)
Alias: Tin-phosphor bronze, Instrument bronze, featuring 6-7% tin and 0.1-0.25% phosphorus.
Key Features of C51900 copper hose
High Strength & Elasticity: Tensile strength ≥480 MPa (cold-worked), elastic modulus 115 GPa; ideal for precision springs.
Corrosion/Wear Resistance: Corrosion rate <0.01 mm/year in atmosphere/freshwater; low friction coefficient (0.18-0.25).
Special Properties: Non-magnetic (μ<1.01), spark-resistant for explosion-proof applications.
Processing Flexibility: Excellent hot/cold workability, weldability, brazing, and machinability.
Product Forms & Dimensions of C51900 annealed coils
|
Form |
Size Range |
Temper |
Standard |
|
Sheet/Plate |
Thickness: 0.1-50mm; Width: 100-1500mm |
O60 (Soft), H08 (Hard) |
ASTM B103 |
|
Strip |
Thickness: 0.05-2.0mm; Width: 10-600mm |
H04, H06 |
GB/T 4423 |
|
Bar (Round/Hex) |
Diameter/Width: Ø5-200mm |
Y2 (Half-hard), T6 (Aged) |
ASTM B139 |
|
Wire |
Diameter: Ø0.1-12mm |
Soft, Half-hard |
ASTM B103 |
|
Tube |
OD: Ø3-150mm; Wall: 0.2-10mm |
Annealed, Hard |
GB/T 4423 |
Chemical Composition of C51900 Pancake Coil Copper Pipe
|
Element |
Req. |
Typical |
Impurity Max |
Function |
|
Sn |
6.0-7.0 |
6.5 |
- |
Strength, hardness & corrosion resistance |
|
P |
0.10-0.25 |
0.15 |
- |
Deoxidation, fluidity & wear resistance |
|
Fe |
≤0.05 |
≤0.02 |
0.05 |
Excessive amounts reduce conductivity |
|
Pb |
≤0.02 |
≤0.005 |
0.02 |
Controls hot shortness |
|
Zn |
≤0.30 |
≤0.10 |
0.30 |
Trace residual |
|
Total Impurities |
≤0.10 |
≤0.05 |
0.10 |
- |
Physical Properties of C51900 Soft Drawn Copper Tube
|
Property |
Value Range |
Unit |
Test Condition |
|
Density |
8.80-8.86 |
g/cm³ |
ASTM B193 |
|
Electrical Conductivity |
15-16 |
%IACS |
Annealed |
|
Thermal Conductivity |
38-42 |
W/(m·K) |
Steady-state heat flow |
|
CTE |
18.5×10⁻⁶ |
K⁻¹ |
20-300°C |
|
Elastic Modulus |
110-115 |
GPa |
Tensile test |
|
Melting Point |
1000-1020 |
°C |
- |
Mechanical Properties of C51900 Soft Copper Tube
|
Property |
Annealed (O60) |
1/4 Hard (H02) |
Hard (H08) |
Test Standard |
|
Tensile Strength (σb) |
≥325 MPa |
≥480 MPa |
≥620 MPa |
ASTM E8 |
|
Yield Strength (σ₀.₂) |
≥150 MPa |
≥400 MPa |
≥550 MPa |
ASTM E8 |
|
Elongation (δ₅) |
≥30% |
≥13% |
≥5% |
GB/T 228.1 |
|
Hardness (HV) |
85-100 |
150-180 |
200-230 |
ASTM E92 |
|
Fatigue Strength (10⁷ cycles) |
140 MPa |
240 MPa |
300 MPa |
Rotating bending |
Core Advantages of C51900 Bending 3/8 Copper Tube
Strength-Conductivity Balance: 15-16% IACS + 480 MPa tensile strength (H02), outperforms C51000/C51100.
Extended Wear Life: 2× longer bearing life vs. brass (PV limit: 2.5 MPa·m/s).
Cryogenic Suitability: No brittleness at -200°C for aerospace/superconducting equipment.
Processing Compatibility: Supports cold heading, stamping (≤30% deformation), TIG welding (SCu5210 filler).
Applications of C51900 Copper Coil Tubes
Electronics: High-reliability connectors, relay springs, test probes (>100k mating cycles).
Precision Instruments: Hairsprings, diaphragms, brush holders, gears (non-magnetic).
Industrial: Bellows, bearing bushes, chemical pump seals (resists weak acids/seawater).
Transportation: Aircraft sensor springs, automotive seat brackets (cold-stamped).
Processing Guidelines of C51900 Rolling Pancake Copper Tube
Hot Working: Strictly 750-770°C; >800°C causes grain growth, <700°C increases deformation resistance.
Cold Working: ≤30% per-pass reduction; intermediate anneal (600-650°C×1h) to relieve hardening.
Welding: Prefer TIG (SCu5210 filler + 200-250°C preheat); post-weld anneal at 500-550°C.
Surface Treatment: Avoid lead-containing coolants to prevent SCC; chromate passivation enhances corrosion resistance.
Key Application Scenarios of C51900 Pancake Capillary Copper Coil
Aerospace Connectors: Stable performance under high vibration (Airbus A350 certified).
Marine Valve Bushings: ≥10-year design life in seawater.
Smart Meter Springs: Elastic hysteresis <0.05% (meets Class 0.1 accuracy).
Explosion-Proof Tools: Spark-free impact for oil platform maintenance.
FAQ
Q1: C51900 vs. QSn4-3 (C51100)?
A1: C51900 has higher Sn (6.5% vs. 4%), 30% higher strength/elasticity, but 20% higher cost. Use C51100 for general springs; C51900 for high-stress springs/wear parts.
Q2: Extra protection in seawater?
A2: Corrosion rate <0.015 mm/year (static). For flow >2 m/s, use passivation/cathodic protection; avoid direct contact with stainless steel.
Q3: Microcracks after cold working?
A3: Caused by excessive deformation/surface defects. Solutions:
1. Limit per-pass reduction to ≤25%;
2. Acid-clean oxide layers pre-processing;
3. Intermediate anneal (620°C×1h).
Q4: Insufficient hardness post-heat treatment?
A4: Verify parameters:
Annealed: 600-650°C + air cooling;
Aging: 320-340°C×2-3h (hardness ↑10-15%).
Types of products GNEE can provide
|
Product name |
Copper/brass/bronze pipe |
|
Material |
Copper,Pure Copper,Red Copper,Brass,Phosphor Bronze,Nickel-Copper |
|
Grade |
Copper:C11000 C10200 C1100 C1220 T2 CU-OF CU-SF |
|
Size |
Outside diameter 2-800mm; |
|
Hardness |
1/16 hard,1/8 hard,3/8 hard,1/4 hard,1/2hard,full hard |
|
Surface |
Polished,bright,oiled,hair line,brush,mirror,or as required |
|
Apllication |
Construction, industrial, decoration |
|
Service |
Custom service |
|
Price terms |
CFR,FOB,CIF,Ex-work,CNF |
|
Classification of copper materials |
copper wire, copper rod, copper strip, copper plate, copper tube, copper, bronze, phosphor bronze, materials include: H96 (C2100), |
|
Products name |
Copper/Brass/Bronze alloy Bar |
|
|
Material |
C10100,C10200,C10300,C10400,C10500,C10700,C10800,C10910,C10920,C10930, C11000,C11300,C11400,C11500,C11600,C12000,C12200,C12300,C12500,C14200, C14420,C14500,C14510,C14520,C14530,C17200,C19200,C21000,C23000,C26000, C27000,C27400,C28000,C33000,C33200,C37000,C44300,C44400,C44500,C60800, C63000,C65500,C68700,C70400,C70600,C70620,C71000,C71500,C71520,C71640, C72200,C86300,C83600,C95400,C95500,C95800, H59,62,H65,H68,H70,H80,H85,H90,H96, T1,T2,T3,TU1,TU0,TU2,TP1,TP2,TAg0.1,etc |
|
|
Size |
Thickness |
2mm-200mm or customized |
|
Width |
10mm-600mm or customized |
|
|
Length |
200mm-6000mm or customized |
|
|
Surface |
Mill,polished,bright,oiled,hair line,brush,mirror,sand blast,or as required. |
|
|
Application |
With high conductivity,copper flat bar can be widely used in: |
|
|
standard |
GB/T4423-2007,
JISH3250-2006, JISH3300-2006, |
|
|
Package |
Standard export package |
|
|
Description
|
copper plate/copper sheet
|
|
|
Other
Standards |
ASTM A276, A484, A479, A580, A582, JIS G4303, JIS G4311,
DIN 1654-5,DIN 17440,GB/T 1220 |
|
|
Material
|
Copper (C10200,C11000,C10100,C10200,C12000,)C11600,
Brass(C21000,C22000,C23000,C24000,C26000,C27000,C27200,C27400,C2800, C31400,C33000,C35600,C37100,C36000,C35300,C37100,C37700,C37710,C37000, C68700,C41100,C44300,C46200.C46400,C26130,C65600,) Bronze(C50500,C51100,C52100,C60800,C61000,C61900,C63010,C62300, C63000,C63280,C63020,C17200,C17000,C17500,C17510,C18200,C18100,C18200, C16200,C19400,C14500) Cupronickel(C70400,C71000,C71300,C71500,C70400,C70600,C75200,C77000, C75400,C79000,C79200) |
|
|
Specifications
|
thickness:0.1~20mm,width:1~2500mm
|
|
|
Price Term
|
EX-Work, FOB, CFR, CIF
|
|
|
Payment Term
|
T/T, L/C, Western Union
|
|
|
Delivery Time
|
According to customer' s quantity
|
|
|
Main Market
|
Europe,South America, Africa ,Oceania ,such as :
USA,Germany,India,.,Dubai,Iraq,Vietnam,Ireland,Singapore,etc |
|
|
Product name |
Copper Wire |
|
Grade |
C10100,C10200,C10300,C10400,C10500,C10700,C10800,C10910,C10920,C10930,C11000,C11300,C11400,C11500,C11600,C12000,C12200,C12300,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,C70620,C71000,C71500,C71520,C71640,C72200,T1,T2,T3,etc |
|
Standard |
JIS ASTM DIN EN ISO |
|
Diameter |
0.3-5mm/custom |
|
Length |
custom |
|
Surface |
mill,polished,bright,mirror,hair line,brush,checkered,antique,sand blast,etc |
|
Application |
Building, industry etc |
|
Payment Terms |
T/T or L/C at sight |
|
Delivery time |
5-15 days after receiving L/C or deposit |
|
Remark |
Specific requirement of alloy grade,temper or specification can be discussed at your request |
Copper CNC machined parts
|
Service Offer |
Cnc Machining/Turning/Milling, Sheet Metal Fabrication, Laser Cutting, Stamping, Bending, Spinning, Wire Cutting, Die Casting, Forging, Gear machining, etc. |
|
Materials |
Aluminum, Stainless Steel, Steel, Brass / Bronze / Copper, Titanium Alloy, Plastic, etc. |
|
Application Areas |
Auto parts, Automated Robots, Drones, Medical Equipment, Mechanical Hardware, Aerospace Military Industry, Electronic Equipment, Lighting Fixtures, 3C Digital Products, Household Appliances |
|
Tolerance |
+/-0.01 mm, Strict tolerance can reach +/-0.005 mm |
|
Processing Capabilities |
10000pcs/day |
|
Drawing Format |
STP, Solid Works, Pro/Engineer, Auto CAD(DXF,DWG), PDF, TIF etc. |
|
Surface treatment |
Anodizing, Hard anodizing, Gradual anodizing, Electro-plating, Electroless nickel, PVD, Painting, Powder coating, Teflon coating, Ceramic plating, Sandblasting, Brush, Mirror polish, etc. |
|
Testing equipment |
Three-coordinate measuring machine, 2.5 Dimension measuring instrument, inside micrometer, outside micrometer, electronic height gauge,Thread go and no-go gauges, external thread ring gauges, electronic calipers, pin gauges |
|
Project delivery |
1-10 days |
|
Product Packaging |
Inner packaging: foam, plastic, paper;
Outer packing: hard thick carton, customized wooden box |
|
Payment Methods |
T/T, L/C, Trade Assurance |
in exporting copper products
With 18 years of experience, we are a leading exporter of high-quality copper products. Our efficient production lines, featuring continuous casting rods, precision drawing, and automated annealing processes, ensure consistent quality. Combined with rigorous in-house testing, including spectral analysis and pressure tests, we guarantee that every copper tube, coil, and rod meets the highest international standards for global clients.
