HPb59-1 Bleihaltiges Messing

HPb59-1 ist eine äußerst repräsentative Industrielegierung und eines der am weitesten verbreiteten Automatenmessinge. Dieser Artikel gibt Ihnen einen klaren Überblick über HPb59-1 bleihaltiges Messing, einschließlich seiner Eigenschaften, internationalen Äquivalente, Verarbeitungshinweise und Materialauswahllogik, damit Sie fundiertere Materialentscheidungen treffen können.
Ausgezeichnet
Zerspanbarkeit
Gute Festigkeit &
Verschleißleistung
Ideal für Präzisions-
Drehteile
Zuverlässige Gewinde- &
Bohrbearbeitung

HPb59-1 Bleihaltiges Messing: Grundlegender Überblick

HPb59-1 ist eine bleihaltige Messingsorte, die unter der chinesischen Norm GB/T 5231 definiert ist. Ihre Bezeichnung folgt einer einfachen Namensregel: H steht für Messing, Pb steht für Blei, 59 gibt an, dass der Kupfergehalt etwa 59% beträgt, und 1 bedeutet, dass der Bleigehalt etwa 1% beträgt.

HPb59-1 ist ein alpha-plus-beta Zweiphasen-Messing. Die Zugabe von Blei verbessert die Zerspanbarkeit erheblich und behält gleichzeitig gute mechanische Eigenschaften und Korrosionsbeständigkeit bei.

In industriellen Anwendungen wird HPb59-1 oft als Automatenmessing oder Freischnittmessing bezeichnet, und es ist ein äußerst vielseitiges Material in der Metallfertigung. Das Blei liegt als feine freie Partikel vor, die entlang der Korngrenzen verteilt sind. Während der Bearbeitung helfen diese Bleipartikel bei der Spanbrechung und Schmierung, was die Schneidleistung erheblich verbessert und den Werkzeugverschleiß reduziert.

Aus fertigungstechnischer Sicht eignet sich HPb59-1 besser für Teile, die primär für die Zerspanung entwickelt wurden. Wenn ein Projekt stark auf Umformstanzen mit großer Verformung, Tiefziehen oder Anwendungen mit hoher Nachgiebigkeit und Kontakt mit Wasser angewiesen ist, kann es besser sein, eine andere Kupferlegierung in Betracht zu ziehen, die für diese Anforderungen geeigneter ist.

HPb59-1 leaded brass material and machined components used in precision metal manufacturing

Schnellidentifikationsleitfaden für HPb59-1

Identifikationskategorie Details Hauptmerkmale
Chinesische Sorte HPb59-1 H = Messing, Pb = Blei, 59 ≈ Kupfergehalt %, 1 ≈ Bleigehalt %
Materialkategorie Kupfer-Zink-Blei-Ternärlegierung Alpha-plus-beta Zweiphasen-Messingstruktur
Kernvorteil Automatenbearbeitung, hohe Effizienz Schnittgeschwindigkeiten können 200 m/min überschreiten
Visuelles Erscheinungsbild Goldgelber metallischer Glanz Dichte etwa 8,5 g/cm³
Normreferenz GB/T 5231-2012 Chinesische nationale Norm für Verarbeitungsmessing

Spezifikationen von HPb59-1

Die chemische Zusammensetzung von HPb59-1 bleihaltigem Messing ist sorgfältig ausbalanciert, um die Zerspanbarkeit zu optimieren und gleichzeitig eine einwandfreie mechanische Leistung beizubehalten.

Kupfer dient als Basiselement und bildet die Grundlage für elektrische Leitfähigkeit, Wärmeleitfähigkeit und Korrosionsbeständigkeit. Zink trägt zur Mischkristallverfestigung bei. Blei ist das Schlüsselelement, das die Zerspanbarkeit verbessert. Andere Verunreinigungselemente wie Eisen, Aluminium und Phosphor müssen ebenfalls streng kontrolliert werden, um eine stabile Materialleistung zu gewährleisten.

Incoming inspection of HPb59-1 leaded brass with measuring tools and material certification documents

HPb59-1 Spezifikationsübersicht

Parameterkategorie Parameter Wertebereich Hinweise
Chemische Zusammensetzung Kupfer (Cu) 57.0%–60.0% Legierungsbasis, bietet die Grundlage für Korrosionsbeständigkeit
Blei (Pb) 0.8%–1.9% Schlüsselfunktionselement zur Verbesserung der Zerspanbarkeit
Zink (Zn) Rest, ca. 38%–41% Bietet Mischkristallverfestigung und hilft, Festigkeit und Duktilität auszubalancieren
Eisen (Fe) ≤ 0,5% Verunreinigungselement, Obergrenze kontrolliert
Aluminium (Al) ≤ 0,2% Verunreinigungselement, Obergrenze kontrolliert
Phosphor (P) ≤ 0,02% Verunreinigungselement, Obergrenze kontrolliert
Gesamtverunreinigungen ≤ 1,0% Allgemeine Anforderung zur Verunreinigungskontrolle
Physikalische Eigenschaften Dichte 8,5 g/cm³ Unterstützt Leichtbau-Überlegungen
Elektrische Leitfähigkeit Ca. 26% IACS Besser als die meisten Stahlwerkstoffe
Wärmeleitfähigkeit 105–110 W/(m·K) Geeignet für Wärmeableitungskomponenten
Linearer Wärmeausdehnungskoeffizient 20,5 × 10⁻⁶/°C (20–300°C) Gute thermische Stabilität
Schmelzpunkt 900–930 °C Typischer Gießfließbereich
Mechanische Eigenschaften Zugfestigkeit (σb) 380–550 MPa Abhängig von der Werkstoffzustandsart
Streckgrenze 240–270 MPa Mittleres Festigkeitsniveau
Dehnung (δ) 10%–25% Gute Duktilität
Brinellhärte (HB) 75–130 Abhängig vom Wärmebehandlungszustand
Rockwellhärte (HRB) 70–85 Härteniveau nach der Bearbeitung
Verarbeitungseigenschaften Zerspanbarkeitsindex 180%–210% Basierend auf Automatenstahl = 100%
Oberflächenrauheit Ra 1,6 μm erreichbar Geeignet für präzisionsbearbeitete Oberflächenqualität
Kaltverformung pro Durchgang Bis zu 45% Moderate Kaltumformbarkeit

Gängige internationale Äquivalente für HPb59-1

HPb59-1 bleihaltiges Messing ist ein weit verbreitetes Automatenmessing mit entsprechenden Sorten in vielen Industriemärkten weltweit. Obwohl die Benennungssysteme je nach Land und Region variieren, sind Zusammensetzung und Leistung im Allgemeinen vergleichbar.

Gängige normübergreifende Referenzsorten für HPb59-1

Land / Region Normensystem Referenzsorte Zusammensetzungsvergleich Anwendungshinweise
China GB/T HPb59-1 Cu: 57%–60%, Pb: 0,8%–1,9% Original reference grade, widely used across applications
United States ASTM / UNS C37700 / C36000 Cu: 57%–61%, Pb: 1.8%–3.7% Commonly used grades in the North American market
Japan JIS C3710 / C3712 Cu: 57%–61%, Pb: 0.8%–1.5% Japanese industrial standard system
Europe EN / DIN CW612N / CuZn39Pb2 Cu: 57%–59%, Pb: 1.5%–2.5% Harmonized standard widely used in the EU
United Kingdom BS CZ122 / PB104 Cu: 57%–59%, Pb: 0.5%–2.0% Commonwealth standard system
Russia GOST C59-1 / ЛС59-1 Cu: 57%–61%, Pb: 0.5%–1.5% CIS standard system

What Processing Methods Is HPb59-1 Bleihaltiges Messing geeignet?

If free-cutting steel is used as the reference standard for machinability, with a machinability index of 100%, HPb59-1 leaded brass can reach about 180% to 210%. In practical terms, that puts it among the better-performing metallic materials for machining.

Process Compatibility of HPb59-1

Prozessart Suitability Recommended Process Parameters Hinweise
Drehen Ausgezeichnet Cutting speed above 200 m/min, feed rate 0.1–0.3 mm/rev Preferred process, with very good chip breaking
Fräsen Ausgezeichnet Medium cutting speed, adequate cooling Long tool life and good surface finish
Drilling Ausgezeichnet Moderate spindle speed, effective chip evacuation Chips break easily and are unlikely to wrap
Tapping Ausgezeichnet Long tap life, high thread quality Well suited to high-volume tapping operations
Sawing Gute High-speed sawing, high efficiency Clean cut surface and low material loss
Automatic lathe Ausgezeichnet Preferred for high-speed, high-volume production Daily output per machine can reach tens of thousands of pieces
CNC lathe Ausgezeichnet Preferred for precision parts Stable dimensional accuracy at IT8 level
Cold heading Mäßig Single-pass deformation ≤ 45% Deformation needs to be controlled carefully
Cold drawing Gute Straightness tolerance ≤ 0.3 mm/m Can achieve h9 fit accuracy
Stanzen Mäßig Medium deformation, with proper lubrication Excessive deformation may lead to cracking
Hot forging Gute 750–800°C, deformation ≤ 40% Low risk of hot brittleness
Schweißen Limited use Oxyacetylene welding, copper-zinc filler wire Brazing is preferred, fusion welding should generally be avoided
Heat treatment Eingeschränkt Annealing at 600–650°C, stress relief at 280–300°C Not suitable for solution treatment and aging

Common Applications and Material Selection Logic

HPb59-1 leaded brass is used in a wide range of applications. In projects where welding is not a key requirement and there are no strict restrictions on lead content, it offers an excellent balance of machinability, mechanical performance, and cost-effectiveness.

Typical Applications of HPb59-1

Application Area Typical Parts Main Requirement Match Material Selection Advantage
Mechanical manufacturing Valve bodies, gears, bushings, bearings, connectors High-precision, high-volume machining High machining efficiency, long tool life, and high yield
Plumbing and sanitary hardware Faucet cartridges, valve cores, pipe fittings, connectors Corrosion resistance in water service, sealing performance Good freshwater corrosion resistance, high machining precision, reliable sealing
Electronics and electrical equipment Plug-in parts, terminals, electrical terminals, switch components Conductivity and precision machining Moderate electrical conductivity, about 26% IACS, with good surface quality
Automotive parts Carburetor parts, instrument gears, brackets, decorative components Cost-effective solution for non-critical safety systems Clear cost advantage and high machining efficiency
Clocks, watches, and instruments Watch gears, plates, metering components, precision screws Very high surface finish and miniaturization Surface finish down to Ra 1.6 μm, with stable IT8 dimensional accuracy
Architectural hardware Lock parts, decorative parts, fasteners, connectors Combination of decorative appearance and functional performance Attractive golden color and good atmospheric corrosion resistance
Heat dissipation components Heat sink parts, heat exchanger components, cooling tubes Thermal conductivity and pressure resistance Thermal conductivity of 105–110 W/(m·K)
Fluid control Hydraulic valve bodies, pipe joints, instrument valves Pressure resistance, corrosion resistance, sealing performance Medium strength and good hot-working properties

Hinweis: If your project has strict limits on lead content, you may want to consider lead-free free-machining brasses such as CuZn21Si3P or CuZn38As. These alloys use elements such as bismuth, silicon, or phosphorus to improve machinability in place of lead. However, they are usually more expensive, and their machinability is generally somewhat lower than that of HPb59-1.

Export Compliance and Use Boundaries for Leaded Brass Projects

HPb59-1 is a lead-containing material and is subject to strict environmental and regulatory controls.

International rules for leaded brass vary by market. For example, the EU RoHS Directive restricts lead content in electrical and electronic equipment, but copper alloys with lead content below 4% may qualify for an exemption. Under REACH, if the lead content in a product exceeds 0.1% w/w, sufficient information must be provided to explain the product’s safe use.

Compliance Assessment for HPb59-1 Leaded Brass

Compliance Area Regulatory Requirement Current Status of HPb59-1 Risk Level Recommended Action
RoHS (EU) Lead in electrical and electronic equipment must be below 0.1%, unless exempted Currently covered by exemption 6(c), compliant if lead content is below 4% Low to medium Monitor the renewal status of the exemption
REACH (EU) SVHC communication required, lead above 0.1% must be declared Lead content is about 1% to 2%, so information communication is required Mittel Prepare SDS and related safety documentation
ELV (EU) Restrictions on lead in vehicles Industrial parts are mainly covered by exemptions Niedrig Confirm the exact application scenario
Drinking water (US) Lead content must be ≤ 0.25% Exceeds the limit, not suitable for direct use Hoch Use a low-lead or lead-free alternative
Drinking water (EU) Strict lead migration limits High risk Hoch Use lead-free brass
Children’s products Strict limits on lead content Not suitable Hoch Use lead-free materials
Food contact Lead migration limits apply Direct use is not recommended Hoch Use food-grade copper alloys
Medical devices Material biocompatibility must be evaluated Must be assessed case by case Mittel Confirm the requirements of the target market

What Information Should Be Provided at the Angebotsanfrage Stage

RFQ-Checkliste

Informationskategorie Details Wichtigkeit Hinweise
Materialspezifikation Grade HPb59-1 or equivalent grade Erforderlich Any restrictions on substitute grades should be stated clearly
Chemical composition range Empfohlen Specify if there are any special composition requirements
Mechanical property requirements Empfohlen Such as tensile strength, hardness, and similar targets
Product form Bar, sheet, tube, or wire Erforderlich Affects process selection
Abmessungen Erforderlich Such as outside diameter, wall thickness, length
Delivery condition Empfohlen Such as hot rolled, annealed, cold drawn
Oberflächenzustand Empfohlen Such as mill finish, polished, turned finish
Drawing and specification Part drawing Empfohlen Including dimensional tolerances and surface requirements
Technical specification Empfohlen Referenced standards and inspection requirements
Tolerance grade Empfohlen IT tolerance class requirement
Quantity and schedule Bestellmenge Erforderlich Quantity per order
Estimated annual demand Empfohlen Helps with volume pricing
Lead time requirement Erforderlich Expected delivery date
Quality requirements Inspection standard Empfohlen Such as GB/T, ASTM, and others
Prüfpositionen Empfohlen Composition, mechanical properties, dimensions, and more
Reporting requirements Empfohlen Which material and inspection reports are needed
Compliance requirements Environmental compliance requirements Empfohlen Such as RoHS, REACH, and others
Origin requirements Empfohlen Domestic, imported, or designated raw material supplier
Packaging requirements Empfohlen Palletized, boxed, and similar requirements

FAQs​

HPb63-3 has a higher copper content, at 62% to 65%, and a higher lead content, at 2.4% to 3.0%. As a result, its machinability is better than HPb59-1, especially for precision parts that demand higher surface finish and longer tool life. However, HPb63-3 also comes at a higher cost, and its cold-working performance is slightly weaker. HPb59-1 offers a better balance of cost-effectiveness and overall performance, making it the preferred choice for most general-purpose parts. If the part requires extremely high cutting speeds and surface quality, or if it will be machined as a miniature part on high-speed automatic lathes, HPb63-3 may be worth considering.

HPb59-1 can be brazed and can also be welded using oxyacetylene gas welding. Welding methods such as submerged arc welding, electroslag welding, spot welding, and seam welding are generally not recommended. Copper-zinc filler wire should be used. After welding, annealing at 550°C for 1 hour is generally recommended to relieve welding stress, and joint strength can reach about 85% of the base material. One critical point is that lead vapor may be generated during welding, so proper ventilation and protection are essential, and exhaust gases must be treated before release. Welding may also alter the properties in the heat-affected zone, so weld location should be considered during design.

HPb59-1 offers good corrosion resistance in dry atmospheric conditions and freshwater environments. In liquid environments with a pH of 5 to 8, the annual corrosion rate generally does not exceed 0.02 mm. However, this material is not suitable for acidic or alkaline environments. In particular, environments containing ammonia or sulfides can easily trigger stress corrosion cracking. There is also a potential risk of dezincification, meaning zinc may be selectively corroded in certain environments such as seawater. For highly corrosive environments, a copper alloy specifically designed for corrosion resistance is usually the better choice.

HPb59-1 can be machined with both high-speed steel tools and carbide tools. Because the material has low cutting resistance and good chip breaking, tool life is significantly longer than when machining steel. For general parts, high-speed steel tools are usually sufficient. For high-precision or high-volume machining, carbide tools offer better wear resistance and dimensional stability. A sulfurized or chlorinated cutting oil is generally recommended to improve surface finish. During machining, sufficient cooling and chip evacuation should be maintained to prevent chip buildup from affecting accuracy.

Chips and scrap generated from machining HPb59-1 are considered lead-containing waste and should be managed as hazardous waste. Effective dust collection systems should be installed in the machining area to prevent lead dust from accumulating. Scrap should be collected separately and handled by a qualified hazardous waste recycler or disposal contractor. It should never be discarded casually. Stock material and finished parts should also be clearly labeled and kept separate from products intended for food-contact applications. For export orders, the supplier should be able to provide scrap handling declarations or recycling certificates that meet the requirements of the importing country.