COPPER ALLOY ROUND PLATE NAVAL BRASS ASME SB171 C46400 O25 FORGED DISC
ASME SB171 C46400 refers to a specific copper alloy material under the ASTM B171/B171M standard, which covers copper-alloy plate and sheet for pressure vessels, condensers, and heat exchangers.
What is the main purpose of a copper alloy forging disc?
A copper alloy forging discis a high-performance metal blank (semi-finished product). It is rarely used as a final product itself; instead, it serves as thematerial foundationfor manufacturing high-value, high-performance core components through further precision machining.
Its applications are extensive, leveraging the different properties of various copper alloys. Here are the key uses:
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Main Application Area
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Specific Use Examples
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Key Property Utilized
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Heavy Industry & Machinery
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High-pressure valve bodies, heavy-duty bearing housings, large bushings, gear blanks, plain bearings, etc.
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High strength, excellent wear resistance, fatigue resistance, and impact resistance.
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Power & Electrical Engineering
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Short-circuit rings and slip rings for large motors, cap rings for high-speed rotors, etc.
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High electrical conductivity (in certain alloys), high thermal conductivity, and structural stability.
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High-End Manufacturing
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Aerospace and marine/shipbuilding industries. Examples include marine propulsion system components and corrosion-resistant bushings for deep-sea oil and gas platforms.
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Seawater corrosion resistance (e.g., aluminum bronze), operational stability under high pressure and vacuum environments.
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Specific Application Examples
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Automotive clutch discs, pump shafts, transmission shafts, metal containers for semiconductor storage, and welding electrodes that require high thermal conductivity and wear resistance.
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Combines high strength, corrosion resistance, high thermal conductivity, non-magnetic properties, etc., depending on specific working conditions.
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NAVAL BRASS C46400: This is the material. It's a specific copper-zinc alloy that also contains tin. The tin addition gives it excellent resistance to corrosion in seawater and marine atmospheres, and it resists a problematic type of corrosion called dezincification. Its typical composition is about 60% copper, 39.2% zinc, and 0.8% tin.
ASME SB171: This is the manufacturing and quality standard. It's published by the American Society of Mechanical Engineers (ASME) and specifically covers copper-alloy plates used in pressure vessels, condensers, and heat exchangers. Using this standard ensures the material meets strict requirements for safety and performance in high-pressure environments.
O25: This specifies the material's temper, or condition. "O25" indicates that the disc has been hot rolled and then annealed. Annealing is a heat treatment that makes the metal softer and more ductile, which can improve its workability for further machining.
FORGED DISC: This is the product form. "Forged" means the material was shaped by applying compressive force, which aligns the metal grain structure and gives it exceptional strength and integrity. A "disc" is a flat, circular piece of this forged metal. It is a semi-finished product, meaning it's a high-quality "blank" that will be machined into a final part.
In short, this is a high-integrity, corrosion-resistant metal disc, made to a strict standard for pressure equipment, and supplied in a softer state that is ideal for machining.
Its main uses are where both high strength and resistance to seawater are critical. Common applications include:
Tubesheets for heat exchangers and condensers in marine or industrial cooling systems.
Heavy-duty fasteners like bolts and nuts.
Marine hardware including propeller shafts, valve stems, bearings, and bushings.
It is considered the most widely used of the tin brasses for these types of applications.
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