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    31Oct, 2025
    Brass parts: “Durable Metal Accessories”

    Brass parts contain 60% to 85% copper.It has three major advantages: corrosion resistance, easy processing and excellent electrical conductivity.

    Solve these pain points easily.

    Choosing the right one can reduce maintenance and replacement costs by more than 30%.

    It can also be adapted to multiple scenarios such as hardware, electronics, and bathroom fixtures.

    The cost performance far exceeds that of ordinary metal parts.

    I. Four Core Advantages of Brass Parts

    Corrosion-resistant and rust-proof: The copper-zinc alloy has a stable structure.

    Easy to process and with good plasticity: Suitable for both small-batch customization and large-batch production.

    Excellent electrical and thermal conductivity: The electrical conductivity is three times that of pure iron.

    Its thermal conductivity is 20% higher than that of aluminium.

    Excellent appearance and texture: It can be used as an accessory to show the texture.

    Ii. Five Precise Application Scenarios of Brass Parts

    Hardware and building materials: Suitable for home and engineering decoration scenarios.

    Electronic and electrical appliances: Ensure stable current transmission.

    Sanitary ware: More durable than plastic parts.

    Jewelry and handicrafts: Favored by handicraft enthusiasts.

    Mechanical parts: Moderate strength and easy to process.

    It can meet the operational requirements of small machinery.

    Reduce mechanical wear failures.

    Iii. Four Key Criteria for Selecting the Right Brass Parts

    Check the purity of the material: Request the supplier to provide a material report.

    Select the corresponding processing technology: An incorrect process will affect the precision and strength.

    Check the dimensional accuracy: The tolerance of the electronic contacts is large.

    Ⅳ. There will be poor contact.

    Pay attention to surface treatment: Avoid improper surface treatment affecting lifespan.

    Four. Three Practical Tips for Extending the Lifespan of Brass Parts

    Soft cloth for daily cleaning: Avoid scratching the surface or corroding the alloy structure.

    Avoid long-term contact with acids and alkalis: Prevent alloy corrosion and discoloration.

    Regular anti-oxidation treatment: For brass parts used outdoors or in damp environments. Read More

    20May, 2025
    Explore Brass: Small Components, Big Effects

    In the precision world of industrial manufacturing, brass parts are small but have a value that cannot be ignored. Today, let us take a deeper look at these exquisite brass parts.
    1. Product Overview
    The brass parts in the picture are exquisite in appearance, showing a bright golden color and a smooth and delicate surface. They have regular shapes, precisely designed holes and structures, and may be connectors or supports that have been finely processed. Brass parts are based on copper and added with elements such as zinc. They have unique comprehensive properties and are indispensable basic parts in many industries.
    2. Production process
    1. Melting: Put raw materials such as copper and zinc into a furnace in a specific proportion and melt them at high temperature to make the various components evenly blend to form a brass alloy liquid that meets the requirements. During the smelting process, the temperature and smelting time must be strictly controlled to ensure the stability of the alloy composition.
    2. Casting or forging:
    1. Casting: If the casting process is used, the smelted brass alloy liquid is poured into a specific mold and waited for it to cool and solidify. The casting process can produce brass parts with complex shapes, such as some parts with special inner cavity structures.
    2. Forging: For some brass parts that require higher strength and density, forging technology will be used. By applying pressure to the heated brass blank, it is plastically deformed to obtain the required shape and performance.
    3. Machining: The brass blank after casting or forging needs to be further processed by turning, milling, drilling and other mechanical processing methods to meet the design requirements.
    4. Surface treatment: In order to improve the beauty and protective performance of brass parts, surface treatment will be carried out, such as polishing to make the surface brighter, or electroplating, painting and other treatments to enhance its corrosion resistance.
    III. Performance highlights
    1. Good mechanical properties: Brass parts have moderate strength and hardness, can withstand certain external forces, and have good plasticity, which is easy to process and shape. At the same time, it has good wear resistance and can maintain a long service life in some occasions where frequent friction is required.
    2. Excellent corrosion resistance: Brass has good corrosion resistance in the atmosphere and fresh water. A dense oxide film will form on its surface, which can effectively prevent further corrosion and is suitable for use in a variety of environments.
    3. Good electrical and thermal conductivity: Brass has good electrical and thermal conductivity. In the field of electronics and electrical, it can be used to manufacture conductive parts; in heat exchange equipment, it can also play its thermal conductivity advantage.
    4. Aesthetics and decorativeness: Its golden color is beautiful and generous. After surface treatment, it can be used in some occasions that require appearance, such as decorative hardware, crafts, etc.
    IV. Application scope
    1. Electronic and electrical industry: used to manufacture various electronic components, such as connectors, switches, relays, etc., using its good electrical conductivity and mechanical properties to ensure the stability and reliability of electrical connections.
    2. Machinery manufacturing industry: As mechanical parts, such as bushings, gears, nuts, etc., with its wear resistance, corrosion resistance and good mechanical properties, it ensures the normal operation of mechanical equipment.
    3. Building decoration industry: In the field of building decoration, brass parts can be used to make door locks, handles, hinges and other hardware accessories, which are both practical and decorative; they can also be used to make decorative sculptures, ornaments, etc.
    4. Plumbing equipment industry: manufacturing faucets, valves, pipe fittings and other plumbing equipment, its corrosion resistance and good processing performance enable it to meet the needs of long-term use of plumbing systems.

    With its diverse performance and wide application, brass parts silently play an important role in various industries and are an indispensable component in both industrial manufacturing and daily life.

    23Nov, 2019
    H62 Brass: Composition, Properties, Processing and RFQ Guide

    H62 Brass: Composition, Properties, Processing and RFQ Guide

    H62 brass is a Chinese wrought copper-zinc alloy designation used for rod, bar, plate, strip, tube and formed components. The “62” indicates a nominal copper level near 62%, but a purchase specification requires more than that shorthand. Product form, governing standard, temper, dimensions, surface condition, inspection and intended environment all affect whether material is suitable.

    This guide is written for industrial buyers, engineers and quality teams comparing H62 brass material. It explains chemistry, microstructure, product-form standards, approximate international comparisons, processing limits, corrosion risks and RFQ information. It does not approve a substitution, pressure boundary, drinking-water application, electrical rating or forming process. Final material and acceptance requirements must follow purchaser-approved documents.

    H62 brass rods retained from the original EB Castworld article
    Existing EB Castworld media-library image retained from the original article; ownership and project provenance were not independently re-established during this rewrite.

    What the H62 designation means

    GB/T 5231-2022 is the current Chinese national standard for designations and chemical compositions of wrought copper and copper alloys. H62 is a wrought common brass grade within that system. It should not be confused with a cast-brass designation or treated as a universal international name.

    The current standard identifies the complete chemical limits. The procurement summary below is useful for screening, but the purchased standard text controls acceptance. Values are mass fractions. Do not replace the standard with a supplier’s typical analysis.

    Element H62 procurement summary Purchasing note
    Copper (Cu) 60.5–63.5% The grade name is nominal; use the specified range for acceptance.
    Zinc (Zn) Remainder Zinc content follows from copper and controlled residuals.
    Iron (Fe) Maximum controlled by GB/T 5231 Verify the exact current limit on the certificate.
    Lead (Pb) Maximum controlled; H62 is not a free-machining leaded brass Do not substitute a leaded machining brass without approval.
    Other residuals Individual and total impurity limits apply Request the full analysis when residuals matter to forming or compliance.

    The often-published summary uses maximum values of 0.15% Fe, 0.08% Pb and 0.5% total impurities, with tighter individual controls for elements such as Sb, Bi and P. Because standards can be revised and reporting conventions differ, confirm these values against GB/T 5231-2022 and the purchase order rather than copying them into a drawing without review.

    Why chemistry does not define the finished properties

    H62 is normally a wrought alloy. Its final strength, hardness and elongation depend strongly on product form, cold work, annealing history, section and test direction. A hard-drawn rod and an annealed sheet can meet the same chemistry designation yet behave differently in bending or machining. Therefore, an RFQ should pair GB/T 5231 chemistry with the applicable product standard and temper.

    For cold-drawn rod and bar, GB/T 4423-2020 is the current Chinese national standard. Sheet, strip, tube or other forms require their own applicable standards. Mechanical values copied from one form or temper must not be presented as a universal guarantee for all H62 products.

    Microstructure and the effect of zinc

    Brasses are copper-zinc alloys whose phases and working response change with zinc content and thermal history. The Copper Development Association explains that lower-zinc alpha brasses are highly cold workable, while intermediate-zinc brasses can contain alpha and beta phases and tend to be easier to hot work but less cold formable. H62 lies near the 60/40 brass region, so processing condition and phase balance require attention.

    Cold work raises strength and hardness while reducing remaining ductility. Annealing can restore formability by recovery and recrystallization, but an uncontrolled cycle can alter grain size, dimensions and surface condition. Buyers should specify the required temper or property range instead of asking for “H62 brass” alone.

    Condition variable Likely influence RFQ control
    Cold reduction or drawing Raises strength/hardness and reduces ductility Temper, tensile/hardness requirement and test direction.
    Annealing Restores formability and changes grain structure Delivery temper, grain-size requirement if critical and dimensional condition.
    Rod versus sheet Different processing route and property direction Correct product standard, dimensions and test method.
    Section size Affects achievable tolerances and forming response Nominal size, tolerance, straightness/flatness and sampling.

    H62 is not automatically equivalent to C26000 or C28000

    Search results often label H62 as equivalent to UNS C27400, C28000, CuZn37, CuZn38, C2801 or another national grade. These may be approximate commercial comparisons, not automatic one-to-one equivalents. For example, the Copper Development Association lists C26000 cartridge brass with a different copper range. Matching a nominal copper percentage does not align every residual limit, temper designation, product-form requirement or mechanical property.

    A substitution review should compare the complete standards and intended product form. The purchaser’s materials engineer should approve the result in writing.

    Comparison item Why it matters Required decision
    Chemical ranges Cu, Zn, Pb, Fe and residual limits may differ Line-by-line comparison to the applicable editions.
    Product form Rod, sheet, strip and tube standards use different requirements Compare the form actually purchased.
    Temper Temper codes and property ranges are not universal Map condition and required tests.
    Dimensions Tolerances, straightness, edge and surface rules differ Use the approved drawing and product standard.
    Regulatory limits Lead, restricted substances or potable-water rules may apply Identify the applicable law and test evidence.

    Forming, machining and joining considerations

    H62 can be processed by hot and cold working, but suitability depends on temper, reduction, bend radius, lubrication, tooling and part geometry. A tight bend in a hard condition may crack even when chemistry complies. If severe drawing or bending is required, state the incoming temper, minimum bend radius, grain direction and whether intermediate annealing is permitted.

    H62 contains only controlled residual lead and should not be treated like a deliberately leaded free-machining brass. Machining parameters and chip control should be qualified for the delivered condition. When brazing, soldering or welding is planned, the joint designer must consider heat input, filler compatibility, zinc volatilization, cleanliness and final service. Follow applicable ventilation and occupational-safety controls; zinc-containing fumes can be hazardous.

    Corrosion and environmental limits

    Brass commonly performs well in many atmospheric and freshwater conditions, but it is not immune to corrosion. Copper.org identifies dezincification concerns for some brasses in stagnant acidic aqueous environments and stress-corrosion cracking in the presence of tensile stress and environments such as moist ammonia. Water chemistry, temperature, velocity, deposits, residual stress and joining method all affect risk.

    Do not approve H62 for seawater, ammonia-bearing service, potable water or a regulated fluid based on a generic corrosion statement. Provide the actual medium and operating range, then obtain materials and regulatory review. If dezincification resistance is mandatory, specify an alloy and test requirement designed for that purpose rather than assuming H62 will comply.

    Environment question Evidence to provide Boundary
    Water chemistry pH, chlorides, dissolved gases, temperature and stagnation “Water service” is not a complete corrosion definition.
    Ammonia or amines Concentration, humidity, temperature and tensile stress Requires stress-corrosion review.
    Potable-water contact Country/market approval and extraction limits Chemistry certificate alone does not prove legal compliance.
    Electrical duty Required conductivity and test method Do not infer conductivity from grade name only.
    H62 brass rod surface and product form from the original article
    Existing EB Castworld media-library image retained from the original article; use the purchase specification rather than appearance to verify grade and condition.

    Dimensional and surface requirements

    For rod, state shape, diameter or across-flats size, length, straightness, end condition and whether the surface is drawn, turned, ground or otherwise finished. For plate or strip, state thickness, width, flatness, coil/length condition, edge and surface class. Identify any area that will be sealed, plated, brazed, formed or used as an electrical contact.

    Visual appearance is not a reliable alloy identification method. Oxide color, staining and polishing can change the surface without changing bulk grade. Use traceable material records and, where agreed, chemical verification.

    Inspection and certificate requirements

    Requirement What to specify Possible record
    Chemistry GB/T 5231 edition, H62 designation, elements and sampling Heat/lot chemical analysis certificate.
    Mechanical properties Product standard, temper, test method and direction Tensile or hardness report where required.
    Dimensions Drawing, tolerances, straightness/flatness and sampling Dimensional report.
    Surface Finish, permitted defects and protected functional areas Visual inspection and agreed photographs if needed.
    Traceability Lot marking, certificate linkage and packaging labels Receiving-verifiable identity trail.

    Common procurement mistakes

    • Ordering “62 brass” without GB/T 5231, product form or temper.
    • Copying typical mechanical properties from an unrelated thickness or condition.
    • Calling C26000, C28000 or CuZn37 an exact equivalent without a standards comparison.
    • Assuming H62 is a free-machining leaded brass.
    • Approving corrosive or potable-water service without environmental/regulatory review.
    • Using color or handheld screening alone as final grade acceptance.
    • Omitting surface, straightness, packaging and traceability requirements.

    RFQ checklist for H62 brass

    1. Product form: rod, bar, sheet, strip, tube or customer-machined component.
    2. GB/T 5231-2022 and the applicable product standard/edition.
    3. H62 grade, delivery temper and required mechanical properties.
    4. Dimensions, tolerance, straightness/flatness, length and surface finish.
    5. Forming, machining, plating, brazing or welding operations planned by the purchaser.
    6. Service medium, temperature, corrosion and regulatory constraints.
    7. Chemistry, mechanical, dimensional and surface inspection records.
    8. Lot traceability, marking, packaging, quantity and destination.

    Receiving and nonconformance workflow

    At receipt, compare the purchase order, packing list, material marking and certificate before mixing lots. Inspect packaging damage, corrosion, dimensions and surface condition using the agreed sampling plan. If chemistry or properties are disputed, quarantine the lot and agree the test method and representative sample location before cutting material.

    Do not relabel an approximate substitute as H62. Record any deviation against the purchase order and obtain purchaser approval. Preserve certificates through machining so finished parts can remain traceable to the incoming lot.

    Related H62 products and technical guidance

    For drawing-based product enquiries, review the H62 copper alloy rod and H62 brass plate pages. The guide to chemistry, heat analysis and product analysis explains why a composition result must be tied to a standard and sampling method. See quality assurance and factory capability for general context.

    Send specifications for review

    Use the contact page to send an H62 brass RFQ. Include the applicable standard edition, product form, temper, drawing, dimensions, planned processing, service environment, inspection, quantity and destination.

    Engineering boundary: This article is general materials and procurement guidance. It does not certify equivalence, corrosion resistance, legal compliance, formability, joinability or component performance. Final acceptance must follow the customer-approved specification and current standard text.

    How to qualify H62 brass before production release

    A useful qualification plan connects the incoming material certificate to the operation that creates the highest risk. For a turned rod component, that may be tool life, chip control, straightness and finished-surface acceptance. For a formed strip component, it may be bend direction, edge quality, minimum radius, springback and cracking after plating. The qualification coupon should come from representative production stock in the ordered temper and size, not from an unrelated laboratory sample.

    Step 1: freeze the purchasing baseline

    Record the governing material and product-form standards, delivery temper, nominal dimensions, tolerances, surface class and certificate requirements. If the drawing contains an international comparison, label it as an approved alternative only after the purchaser has reviewed chemistry, temper and product-form differences. A supplier should not decide equivalence from a trade-name table.

    Step 2: link receiving checks to processing risks

    Use traceable receiving checks appropriate to the risk. Certificate review and dimensional inspection may be sufficient for a mature, controlled application; critical forming or regulated service may require agreed verification testing. Handheld alloy screening can support identification, but its detection limits and surface sensitivity must be understood. It does not automatically replace a laboratory method or the purchase specification.

    Step 3: run a representative process trial

    Document tooling, lubrication, speed, reduction, heat input and inspection results. For forming, record material direction, bend radius and evidence of edge or surface cracking. For joining, qualify the exact filler, preparation, heat source and ventilation controls. For plating, confirm cleaning compatibility and adhesion. Retain the trial record with the heat or lot identity so a later process change can be distinguished from a material change.

    Step 4: define release and change control

    State who may approve deviations in chemistry, temper, dimensions, surface condition, mill source or processing route. A successful first-article trial does not permit silent substitution on later orders. When service includes corrosion, pressure, potable water or a regulated market, the responsible engineer must define any additional qualification and compliance evidence.

    References