Ningbo city

China 315137

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Brass Casting

Renyi Casting is a leader in the manufacturing of Brass & bronze castings, ranging in weight from a few grams up to 50 pounds. It can manufacturing and supply brass casting both by Sand Casting and Investment Casting process.

What Brass is

Brass casting, as the name suggests, involves the use of brass as the molten metal. Brass casting can be carried out by the way of sand casting as well as investment casting process. Sand casting can be defined as a ‘cast part’ produced by formation of a mold from a mixture of sand and pouring the casting liquid (mostly molten metal) into mold. Then the air-cooling of the mold takes place. After the solidification of metal, the removal of mold takes place. The metal used here is brass. It is a known fact that brass is an alloy of copper and zinc. Hence, to be precise, the molten metal consists of two elements.

Sand molding consists of two types- ‘Green sand’ molding and ‘air set’ molding. The first one consists of a blend of moisture, clay, silica sand and other additives. The second one makes use of dry sand bonded to all the above materials except moist clay, by the way of using an adhesive, which is fast curing. 

Design Requirements: The thing in making and the pattern corresponding to it should be designed in such a way that every stage of process can get accommodated. One should be able to take away the pattern without causing any disturbance to molding sand.

How We Do

Brass Investment Casting
Lost Wax Casting

We started to apply brass investment precision casting to our production in 2006 because of the large demand of precision decorative parts  from our customers.

Brass Precision Casting

Our brass precision casting products include items from as small as few grams to as big as 50 pounds. Contact us with your specific requirements such as corrosion resistance brass castings, machining ability brass castings, or strength, and our engineering staff will assist you in selecting the specific brass investment casting grade that meets your needs.


  • Smaller diameter holes than forging, sand casting and die casting
  • Tolerances within +/- .005 inches per linear inch
  • More environmental friendly
  • Highly complex dimensional geometry
  • Lower tooling cost
  • Typical surface finish of 175 RMS micro-inch


  • 100% inspection before shipment
  • Pre-shipment sample for free
  • HD pictures of the production process

Bronze Casting Grades

  • Tin Bronze
  • Silicon Bronze
  • Aluminum Bronze
  • Manganese Bronze
Renyi cast most grades of bronze for many industries and applications. If you have questions about a particular bronze grade, please drop us a E-mail.

Our product range is manufactured using premium quality material, and is extensively used to mould large components and tools. Also, the product range is ideally suited for applications where corrosion resistant finish, high strength, conductivity and appearances are the primary focusing features.

We are the prominent provider of bronze & brass casting. The brass is an alloy of copper and zinc, bronze is an alloy. By using these, we provide bronze & brass casting to customers. It is extensively used for the structural metal aluminium bronze, for potable water systems and in the metal casting industry. We provide this in various specifications and sizes as per the industrial requirements.

Customer service
Feedback RFQ In 12 Hours

Our professional sales team will feedback your RFQ within 12 hours, and give you the Quotation within 48 hours max. if the drawing and specification is all in details.

Our professional sales team will feedback your RFQ within 12 hours, and give you the Quotation within 48 hours max. if the drawing and specification is all in details.

For normal project, we can complete Mould and supply the 1st article sample within 30 to 40 days.

For urgently project, we can complete the Mould and Sample within 20days max.

For Mould/tooling and sample : 50% deposit pay by Order, rest 50% pay after sample approval.

For production Order for new Customers : we request 30% down payment, rest 70% pay by copy of Original B/L copy. For long lasting regular customer, we can give better payment terms, such as 100% pay after delivery or by B/L copy.

Quality is our life, during production, from QC to all our operators, we take quality as first thing, during the 1st Article sample and production, our team maintains the quality with same high level. However, no matter how we strictly to the quality, it is a possibility to supply non-qualified shipment to our clients, if this unhappy thing be happen, we will try our very best to negotiate with our customers and solve it as following : and try to reduce our customer’s loss as less as possible, then we will both earn experience from the lessons and definitely for our future  repeat order, we can supply the excellent quality shipment.

If the Order shipment have any quality problem, we will be open to discuss with clients, and manage to solve the non-conformity at our best efforts. If Client can repair the parts at locally, we can compensate back to re-pair local re-work cost. If can not be re-worked, we will return back the 100% money or issue a Credit note for the replacement of amount. Or replacement the new QTY of shipment to client. And if the non-conformity is not critical, customer can compromised accept them, we’re happy to discuss friendly with customer by give some discount to close this non-conformity shipment.