We can supply parts in cast only or fully finished condition. Amongst various surface treatments such as plating, polishing, painting and others we also offer heat treatment, machining and assembly services as required.


At Densen Group we understand the value of customer service and are constantly looking for opportunities to add value. Adding additional services like heat treatment, machining or assembly can reduce administration, overhead costs, provide more control and visibility as well as reduce the supplier base.


Many materials require specific heat treatment to achieve desired mechanical properties, such as hardness, tensile strength or ductility or simply to normalise the grain structure after the casting process.  Types of heat treatment used are as follows:

  • HIP (Hot Isostatic Pressing)
  • Vacuum heat treatment
  • Annealing
  • Solution annealing
  • Normalising
  • Harden and tempering
  • Case harden
  • Induction harden
  • Carbonitriding


Dean Group are able to offer assembly options at source in China adding tangible value to our casting supply service.

  • Rivet castings together
  • Fit bearings, springs, split pins etc
  • Weld
  • Fit together with other proprietary parts


A variety of surface treatments and finishes can be applied to improve the appearance of the finished part, to improve the corrosion resistance or the alloy’s mechanical properties. These include but are not limited to:

  • Painting
  • Powder coat
  • Plating:Chrome, Nickel, Electroless Nickel, Zinc and more
  • Anodizing
  • E-coatingElectro polish
  • Mechanical  polish
  • Mirror polish
  • Brush polish
  • Grit blast
  • Vapour blast
  • Tumble shot blast
  • Vibro rumble
  • Glass bead
  • Hand blast with aluminium oxide

We are continuously expanding our finishing services depending on the customer requirements. We are happy to develop new routes and provide niche services in order to provide our customer with completely finished part where possible.

  • Q Are you a manufacturer or a trader?

    We have our own foundry ,forging factory and machinery shop located in Liaoning Province, China.
  • Q What can you do for customer?

    One Stop Service
    1).Manufacturing and supply various machinery parts.
    2). Technical analysis and design 
    3).Factory audit, on-site production supervision, in-time feedback, pre-shipment quality inspection
  • Q How could you commit the product quality?

    1) all our factories were ISO certified. 
    2) more than 50% of New Densen’s products were sold to worldwide top 500 companies 
    which located in North American, Western Europe, and Japan.
    3) New Densen’s QC engineers will do on-site supervision and before EX-work quality inspection. New Densen will issue inspection reports for customers’ approval before EX-work. New Densen will be responsible for its reports and every parts no matter how long sold to customers.
  • Q How long shall we get the quotation?

    Processing time for inquiry: 1-3 working days.
  • Q What's the process of developing a new steel casting product?

    The procedure for new project develop as below:
    1. Technical department analyze the drawings all details 
    2.Pattern design and manufacture
    3.Casting Process
    4.Quality Control inspect the casting parts
    5.Issue inspection report for customer to check quality
    6. After inspection report approved, Logistics Department help arrange the shipping to customer