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Copper Trend
Copper Trend
LME Copper Cash - Settlement V/S LME Copper Stock ( in USD ( $ ) per ton )
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Alloy Specification
Alloy Specification - Brass Alloys
Brass Alloys
C23000
( Red Brass, 85% ) Commonly used for pipes and pipe nipples. Excellent cold working properties; common fabrication processes include forming and bending, threading and knurling. Red Brass is the best quality pipe for general plumbing purposes. It has high corrosion resistance to water. Furnished in semi-annealed condition
C26000
( Cartridge Brass, 70% ) Non-leaded brass is available in sheet, plate, and tube. This alloy offers the best combination of strength and ductility of all the copper-base alloys. Soft temper is widely used for severe cold working operations such as deep drawing and spinning. Half hard for stamping and light bending and forming, spring temper combines mild rigidity with good appearance. Typical uses include architectural, automotive, hardware, industrial, and munitions. Excellent cold working properties
C27200
( Yellow Brass ) Available in tubes. Excellent cold working properties
C27400
( Yellow Brass ) Available in tubes. Excellent cold working properties
C33000
( Low Leaded Brass ) Available in tubes. The addition of low amounts of lead allows for some degree of machinability, together with moderate cold working properties
C33500
( Low Leaded Brass ) Available in tube. The addition of low amounts of lead allows for some degree of machinability, together with moderate cold working properties
C35300 / C35600
( High Lead Brass ) Available in sheet and plate. Machinability ratings of 90 and 100, respectively. Common fabrication processes include blanking, machining, piercing and punching, and stamping
C36000
( Free Cutting Brass ) Available in rod and bar. With a machinability rating of 100, it is the standard against which all other copper alloys are rated. Ideally suited for high-speed machining; also has excellent thread rolling and knurling properties. Good mechanical and corrosion-resistant properties. This alloy is the most popular copper base rod alloy for general screw machine work
C44300
( Admiralty Brass ) Arsenical admiralty brass condenser tube is a standard condenser and heat exchanger tube, offering good corrosion resistance in fresh and salt water (at moderate velocities) and exceptional heat transfer characteristics
Alloy Specification - Bronze Alloys
Bronze Alloys
C22000
( Commercial Bronze ) This copper-zinc alloy has excellent cold working properties for spinning and drawing. It is stronger and harder than copper and has good resistance against stress corrosion or season cracking. It is excellent for outdoor services such as lighting fixtures, weather stripping, kick and push plates
C38500
( Architectural Bronze ) This alloy is similar to C360 (Free Cutting Brass) with the only significant difference being a slightly higher lead content in C360 for better machinability. The machinability rating for C385 is 90, compared to 100 for C360. While available in several product forms, we stock this alloy in angle only
C46400
( Naval Bronze ) The excellent strength and corrosion resistance of this alloy makes it a favourite for shafting. It has fair machining qualities but is readily hot-headed and hot forged. It is widely specified for tube sheets and support plates in heat exchangers and steam condensers
C51000
( Phosphor Bronze ) Phosphor Bronze is an alloy of copper and tin to which phosphorus is added to completely get rid of the alloy of oxides. When rolled 8# hard it is tough and strong and possesses great resistance to fatigue and corrosion. Diaphragms, switch parts and electrical contacts are some of its typical applications
C61400
( Aluminium Bronze Sheet / Plate ) This aluminium bronze has high strength and good properties at both high and sub-zero temperatures. it can be hardened by cold working and possesses high impact and fatigue strength. Its excellent corrosion-resistance makes it well suited for the process and marine industries. Its use as wear strips and plates reflects its inherent wear- resistance properties
C63000
(Aluminum Nickel Bronze) This is a nickel aluminum bronze and is widely used when even greater strength than aluminum bronze is required, such as for cam bearings, pump agitators, shafts and aircraft parts
C64200
( Aluminium Bronze Rod ) The addition of aluminium to copper generally improves the corrosion resistance. High strength, hardness, wear-resisting qualities, and good resistance to corrosion fatigue are attributes of this alloy
C65500
( Silicon Bronze ) This copper-silicon alloy is characterised by high strength and exceptional resistance to corrosion. It has the strength and toughness of mild steel, is excellent for both hot and cold working, and is readily welded. It is widely used for pole line and marine hardware, welded tanks, and unfired pressure vessels
C67500
( Manganese Bronze ) In tin bronze, manganese is added to serve as a deoxidizer. Its principal characteristics are high strength, toughness, and excellent resistance to corrosion. This alloy has important marine applications such as propellers, rudders, and non-magnetic mountings
C93200
( SAE 660 Bearing Bronze ) This alloy provides the bearing characteristics of balanced excellence. It is stocked in 105" random bars and can be cut to specific lengths as required. These machinable bronze bars are used chiefly for making maintenance bearings, parts, or repairs to machinery. Typical examples are bearings for cranes, fuel and water pump bushings, and machine tool bearings
SAE 841
( Solid Sintered Bearing Bronze Bars ) After forming, sintering, and sizing, the finished bearings are impregnated with SAE 30 high grade, non-detergent mineral oil conforming to MIL-L-151016A
Buyer's Guide
Buyer's Guide
What - Quantity
How - Review the annual requirements and recommend the supplier
Why - Annual requirement allows the supplier to minimise the tooling setup cost and greater flexibility for opting the most economical manufacturing method
What - Overs and Under-Runs
How - Ordering the exact quantity could result in an increased cost
Why - Provision must be made for over-runs and under-runs, which could be factored into the quoted price
What - Delivery
How - Provide your supplier with a proximate forecast which allows sufficient lead time for systematic planning
Why - A proximate forecast allows more cost-effective manufacturing runs. Express delivery necessitates the use of procuring materials and labour at a premium
What - Packaging
How - At the time of requesting quotations, notify the supplier if any specific packaging, labelling, or barcoding is required
Why - Due to the cost of special materials and labour, customised packaging needs are costlier. A supplier may be able to provide an alternative or economical packaging if notified in advance
What - Material
How - Opt for standard sizes of free-machining grades if the design and application permit
Why - Standard sizes are cost-effective and widely available. The use of free machining material ( Brass ) results in higher production, a finer finish, and helps in achieving critical tolerances
What - Tolerances
How - Indicate critical tolerances that are absolutely required for functionality
Why - Components with critical tolerances can be manufactured but may incur higher costs
What - Internal Diameters
How - The maximum permissible hole diameters should be indicated
Why - Non-standard internal diameters can be manufactured with specialised tooling at an additional cost. Standard drills and reamers are readily available with precision machined product suppliers.
What - Threads
How - Indicate the use of standard threads from ISO Metric, BSP, BSW, BA, UNC, UNF, NPT, NPTF, etc
Why - Special threads necessitate the use of specialised tools and gauges. Closer fit may necessitate additional procedures. Full-length threads are more difficult to tap
What - Gauges and Gauging Equipment
How - A designed part should avoid the use of special gauges wherever possible
Why - The cost of the part is increased by the use of specialised gauges and gauging tools. Customers can supply their own special gauges to have a cost-benefit
What - Finish
How - Indicate surface finishes that are necessary for the functionality
Why - Finer surface finishes may necessitate specialised tooling, a longer cycle time or additional procedures, as well as specialised handling and packaging methods
What - Quality
How - Indicate the quality parameters and highlight the attributes that are critical for the products' performance
Why - This will allow the supplier to focus on what is important and to follow parallel or compatible quality procedures
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