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  • C65500 High Silicon Bronze

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C65500 High Silicon Bronze "A" sheet/plate
C65500 is a high-silicon bronze alloy renowned for its exceptional corrosion resistance, high strength, and excellent formability. It belongs to the copper-silicon alloy family, with a typical composition of 94–96% copper, 2.8–3.8% silicon, and minor additions of manganese, iron, and zinc

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Parameter
Chemical Composition
Mechanical Properties

Dimensional Specifications for C65500 Copper Plate

C65500 plates are available in standardized dimensions, with flexibility for custom orders. Key specifications include:

ParameterRangeNotes
Thickness1/8" (3.18 mm) to 4" (101.6 mm)Thicker plates (>4") can be custom-produced .
Width × Length48" (1,219 mm) × 144" (3,658 mm)Standard sheet/plate size for industrial use .
TolerancesGoverned by ASTM B96/B96M for thickness, flatness, and edge straightnessCritical for pressure vessel and structural applications .

Note: Plates are typically supplied in mill finish but can be polished, brushed, or coated as required .


International Standards for C65500 Copper Plate

C65500 plates adhere to stringent international standards, ensuring compliance with mechanical, chemical, and dimensional requirements:

Primary Standards:

  • ASTM B96/B96M:

    • Specifies requirements for copper-silicon alloy plates, sheets, strips, and rolled bars for general purposes and pressure vessels.
    • Covers UNS C65500, including chemical composition, temper designations, tensile strength (275–450 MPa), and elongation (15–30%) .
    • Key clauses: Dimensional tolerances, heat treatment, and testing protocols for hydrostatic pressure applications .

  • ASME SB96:

    • Mirrors ASTM B96 but includes additional guidelines for ASME Boiler and Pressure Vessel Code compliance.
    • Mandatory for components used in certified pressure systems .

Supplementary Standards:

  • ASTM B100:
    • Applies to rolled copper alloy plates for bridge and structural bearings, emphasizing fatigue resistance and thermal expansion properties .
  • SAE J463:
    • Defines wrought copper alloy specifications, including C65500, for automotive and industrial applications .





Chemical Composition

C65500 is a high-silicon bronze alloy primarily composed of copper (Cu) and silicon (Si), with controlled additions of manganese (Mn), iron (Fe), zinc (Zn), and trace impurities. The chemical composition adheres to ASTM B98M-2003, B99M-2006, and B315-2006 standards . Key elements are specified as follows:

ElementComposition Range (wt%)
Copper (Cu)94.8% min (remaining after alloying elements)
Silicon (Si)2.8% – 3.8%
Manganese (Mn)0.5% – 1.3%
Iron (Fe)≤ 0.8%
Zinc (Zn)≤ 1.5%
Nickel (Ni)≤ 0.6%
Lead (Pb)≤ 0.05%
Tin (Sn)Not specified (trace)
Arsenic (As)Not specified (trace)

Notes:

  • Silicon (Si) is the primary strengthening element, enhancing wear resistance, fatigue strength, and corrosion resistance .
  • Manganese (Mn) improves hot workability and contributes to age-hardening .
  • Impurities like lead (Pb) are tightly controlled to avoid embrittlement .

Mechanical Properties

C65500 exhibits a unique combination of strength, ductility, and corrosion resistance. Its mechanical properties vary significantly with temper (heat treatment and cold-working states). Below are detailed specifications across common temper designations:

2.1 General Mechanical Properties (Typical)
  • Tensile Strength: 345–620 MPa (50–90 ksi) .
  • Yield Strength (0.5% offset): 105–380 MPa (15–55 ksi) .
  • Elongation: 8%–35% (depending on temper) .
  • Hardness: 60–100 HRF (Rockwell F Scale) or 75–95 HRB (Rockwell B Scale) .
  • Density: 8.53–8.94 g/cm³ .
2.2 Mechanical Properties by Temper Designation

C65500 is available in multiple tempers, as defined by ASTM B98 and ASME BPVC standards. Below are key states:

TemperConditionTensile Strength (MPa)Yield Strength (MPa)Elongation (%)Hardness (HRF/HRB)Applications
O60Soft Annealed360–485105–26025–3560–75 HRFCold forming, deep drawing .
H01Quarter-Hard380–615165–36013–2575–85 HRBFasteners, bushings .
H02Half-Hard450–615205–38015–2080–95 HRBBolts, hydraulic tubing .
H04Hard485–690260–3808–1785–100 HRBHigh-stress components (e.g., piston rings) .
H06Extra-Hard≥690≥380≤7≥95 HRBSprings, high-strength fasteners .

Notes:

  • Age Hardening: C65500 can be precipitation-hardened by aging at 150–350°C (302–662°F), enhancing strength through Mn-silicide precipitation .
  • Cold Work: Pre- or post-aging cold work further increases strength (e.g., H04 temper)
INTRODUCTION
Production process of C65500 copper plate

Traditional rolling process

Process flow: adopts a mature process chain of induction melting-vertical semi-continuous casting-hot rolling-milling-cold rolling-bright annealing-finishing. The process equipment is stable and can produce high-precision, dense copper plate strips, covering almost all alloy grades, with strong market adaptability.

Key steps:

Hot rolling and cold rolling: preliminary forming through hot rolling, cold rolling further refines the grains and improves the surface quality.

Bright annealing: eliminates residual stress after cold rolling and improves material ductility.

Finishing: includes pickling, straightening, etc. to ensure the dimensional accuracy and surface finish of the final product.

Advanced processing technology

Electron beam additive manufacturing: optimizes the microstructure through plastic deformation (such as compression) and subsequent heat treatment to improve strength and corrosion resistance.

Hydrostatic extrusion: adopts severe plastic deformation technology (accumulated true strain up to 4.1), significantly refines the grains, increases the tensile strength by 45%, and increases the yield strength by 130%.

Product advantages of C65500 copper plate

Excellent mechanical properties


High strength and ductility: tensile strength can reach 450 MPa (H04 hard state), elongation 20%, high yield strength (≥125 MPa) and good ductility (annealing elongation 40%).


Elasticity and wear resistance: high elastic modulus, suitable for springs and elastic contact pieces; excellent wear resistance, suitable for friction parts such as shafts and bearings.

Excellent corrosion resistance


Seawater environment: strong corrosion resistance to seawater, chlorine-containing media and acidic environments, suitable for ships and marine engineering.

Antibacterial property: EPA-certified, with anti-biological attachment and antibacterial properties, can be used in hygienic sensitive fields such as hospital equipment.

Processing and functional advantages


Hot and cold processing performance: supports a variety of processes such as cold stamping, welding, brazing, etc., suitable for complex parts manufacturing.

Thermal conductivity and electrical conductivity: high electrical conductivity (≥28% IACS) and thermal conductivity, suitable for heat exchangers and electrical components.

Non-magnetic: Outstanding performance in electromagnetic sensitive scenarios (such as medical equipment, electronic instruments).

Diverse application scenarios


Industrial field: hydraulic pipelines, bolts, heat exchange tubes, propeller shafts, etc.

Electronics and energy: lead frames, electronic sockets, semiconductor heat dissipation components.

Architecture and decoration: Good weather resistance, can form natural patina, suitable for outdoor structural parts.

FAQ

Q1:Do you provide samples? Is it free or extra?
A1:Yes, we can provide samples free of charge and the customer will pay the freight.
Q2:What if I don't have export experience ?
A2:We have reliable forwarder agent which can ship items to you by sea/air/Express to your doorstep. Any way, we will help you choose the most suitable shipping service.
Q3:How long is your lead time?
A3:If it is in stock, it is usually 5-10 days. Or, if there is no inventory, 15 days, depending on the quantity.
Q4:What are your terms of payment?
A4:30% T/T deposit in advance, 70% T/T balance within 5 days after B/L copy, 100%.Irrevocable L/C at sight, 100% Irrevocable L/C after receive B/L 30-120 days, O/A.
Q5:How is your technical support?
A5:We provide lifetime online support through Whatsapp/ Skype/ Wechat/ Email. Any problem after delivery, we will offer you call anytime.

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