contact@sydensen.com

How to distinguish between nodular cast iron and cast steel valve valves

Views: 8     Author: Site Editor     Publish Time: 2016-11-23      Origin: Site

 How to distinguish between nodular cast iron and cast steel valve valves

Nodular cast iron and cast steel valve will be screw up a lot of people, don't know which is which, the following is to introduce the difference between these two kinds of valves.
 
1. See nodular cast iron and cast steel valve how to distinguish the machining surface of grey: it is gray, the luster is very dark, the surface is rough.Ductile iron, grey, luster is grey iron bright, surface roughness of grey.
 How to distinguish between nodular cast iron and cast steel valve valves
2. Grey filing test: filing resistance is small, "shua shua" during a filing, rarely stick file, sawdust is a film, have a small amount of silver bright spot, studied the grain size is differ, give priority to with small particles at the end of the fine, grinding with finger, it is easy to darken the fingers.Ductile iron: when filing resistance slightly larger than the ash, also has the obvious "shua shua" sound, very few sticky file, sawdust is a film, a fine bright spots, particle size, but is given priority to with large particles, grinding with finger sawdust, can make the fingers stained black, but the degree of grey iron dark to light.
 How to distinguish between nodular cast iron and cast steel valve valves
3. Listen to the beat of grey: voice, a very short duration.Ductile iron: crisp, lingering sound, short duration.
 
Above is about ductile iron and cast steel valve difference related introduction, hope can help to you.

  • Q Are you a manufacturer or a trader?

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

    A
    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?

    A
    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?

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

    A
    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