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Article Archive Oct. 2010

Dandong Foundry is a professional Iron Casting Manufacturer in China. We share some standards and experiences in our blog,
and truly hope these information could help buyers to better understand some technical issues related with iron and steel castings.

  1. How to select iron casting process? - on Oct 27, 2010
    The most common iron casting process is sand casting, followed by special casting methods, such as metal mold casting, investment casting, plaster casting and so on.
  2. Properties of Gray Cast Iron  - on Oct 27, 2010
    Gray cast iron can be regarded as carbon steel as matrix organization with graphite flakes added. Gray cast iron can be divided into three categories according to the different matrix organization: ferritic matrix of gray cast iron, pearlitic gray cast iron matrix, ferrite and pearlite matrix of gray cast iron.
  3. Industrial Burners - on Oct 25, 2010
    Industrial burners mean the natural gas burners or propane gas burners, which are used in industrial fields such as in hospital, restaurant, factories etc. In USA, the industrial burners have been widely used for long history.
  4. The Difference between Pig Iron and Wrought Iron - on Oct 21, 2010
    Pig iron usually refers to the iron alloy with carbon content of the 2 to 4.3%, also known as cast iron. Besides carbon, pig iron also contains silicon, manganese and small amounts of sulfur and phosphorus, it can not be forged, but can be cast.
  5. Ductile Iron Application - on Oct 20, 2010
    The scope of ductile iron application can be divided into four fields: First, pressure pipes and fittings. Second, the automobile industry. Third, agriculture, road and construction applications. Fourth, general engineering.
  6. Floor Molding Process Introduction - on Oct 15, 2010
    Floor molding is a traditional sand molding process. Floor molding means we make the sand castings on floor or ground by sand boxes.
  7. ASTM A48 - 2000 / ASTM A159 - 1993 / ASTM A319 - 1995 - on Oct 15, 2010
    This standard is for gray iron castings used for general engineering use where tensile strength is a major consideration. Casting degrees are classified on the basis of the tensile strength of the cast test bars.
  8. Iron casting and resin sand casting equipments development in China - on Oct 14, 2010
    China has become one of the world's largest casting machine manufacturers. Chinese foundry machinery manufacturing industry has made great achievements in recent years.
  9. How to prevent sand holes in iron castings - on Oct 14, 2010
    As for the resin sand molding, water glass sand molding, although the intensity of the two molding are very high, sand holes will still appear in iron castings.
  10. Basic Knowledge of Metal Casting - on Oct 14, 2010
    Metal casting has been widely used in our residential and industrial fields. Casting is the foundation of modern machinery manufacturing industry.
  11. Cast Iron Stove Burner - on Oct 14, 2010
    Cast iron stove burner is the main product of Dandong Foundry in China. Cast iron stove is produced by material of gray iron of ASTM 20 grade. The production technology is shell molding and green sand molding process.
  12. How to determine the rough casting tolerance? - on Oct 14, 2010
    Sometimes, our clients will be wondered how to determine the rough casting tolerance. According to our experience, the standard of BS6615:1996 and SFSA 2000 can be used for solving this issue.
  13. Casting Supplier Questionnaire Template - on Oct 14, 2010
    The following are the empty template of casting supplier questionnaire or called survey report for iron casting and steel casting suppliers in China. We recommended these two templates because we think they are suitable for Chinese casting suppliers.
  14. Ductile iron in China - on Oct 14, 2010
    Ductile iron is also known as nodular cast iron, spheroidal graphite iron, spherulitic iron.
  15. Cast Iron Skillet in China - on Oct 13, 2010
    Cast iron skillet is also known as cast iron pan or iron skillet.
  16. Tractor Gearbox made in China - on Oct 13, 2010
    The main function of the gearbox is supporting the drive shaft to ensure that the center distance between the axis and parallel, and to ensure tractor gearbox components connected with other parts of the correct installation.
  17. BS3100 1991 Cast Steel Chemical Composition - on Oct 13, 2010
    The following standard is the part 1 of the BS3100 1991. Including Grade A1, A2, A3, A4, A5, A6, AL1, AL2, AL3, BL2, AM1, AM2, AW1, AW2, AW3. It is the chemical composition limits for the cast analysis of carbon, carbon manganese and low alloy steel castings.
  18. Iron and Steel Rough Casting Tolerance Standard ISO 8062:1994; SFSA2000; BS6615:1996 - on Oct 13, 2010
    What standard can be used for the rough casting tolerance for iron and steel materials? How to choose suitable casting process for your iron and steel castings? Which casting process is suitable to your products?
  19. FBO automatic molding line in China - on Oct 12, 2010
    As for the sand castings, there are several molding processes, which include manual moulding, machine molding (mechanical moulding), automatic machine molding.
  20. Belt Pulley (ductile iron) - on Oct 12, 2010
    These large belt pulley are from 500kg to 2tons, which are used for the large rock crushers. We made them for our clients in Germany.
  21. Crane Ball (gray iron) - on Oct 12, 2010
    Crane ball is the balance weight for the heavy-duty cranes. Their material are usually Gray Iron Class20 or called GG20. Their weights are from dozens of kilogram to hundreds of kilogram.
  22. Foundation Plate (gray iron) - on Oct 11, 2010
    We made these large plates for our client in USA. Their material is Gray Iron Class 35, with Brinell hardness BH 160-220. Their weights are from 60kg to 300kg per piece.
  23. Wooden patterns, resin patterns, metal patterns and molds in China - on Oct 11, 2010
    Wooden patterns are also named wooden molds, wooden moulds, which are made in pattern workshops, the materials are wood.
  24. The problems with brake drum made in China - on Oct 10, 2010
    The material degree for brake drums is gray iron class 35 (HT250, FC250, GG25, ISO300, G250) with 1% copper (Cu). Their Brinell Hardness should be HB 180-250. Their weights are usually from 10kg to 45kg.
  25. Gas Stove Burner (gray iron) - on Oct 10, 2010
    Gas stove burners are used on the gas stoves or furnaces for residential and industrial usage. Usually, the gas stove burners are made by gray iron class 25, 30, 35, or called grey iron.
  26. The problems with iron foundries in China - on Oct 9, 2010
    The iron foundries are also known as iron casting workshops, which manufacture iron and steel castings.
  27. Manhole Cover (gray iron) - on Oct 9, 2010
    Cast iron manholes are widely used in the drainage system. We made these manholes, covers and frames by grey iron (gray iron), which could reduce the costs and be wearable and have good resist deformation.
  28. The problems with steel foundries in China - on Oct 8, 2010
    There are three kinds of steel foundries in China. One is the sand casting foundries, then the water glass investment steel casting workshops, and the silica sol investment steel casting workshops.
  29. Cast Iron Flywheel - on Oct 8, 2010
    Flywheel is also known as cassette sprockets, flying wheel, Freewheel. Flywheel is usually made by gray cast iron (grey iron) HT250 (ASTM NO.35, GG25, ISO250) and ductile iron QT500-7 (ASTM NO.70-50-05, GGG50, ISO500-7), QT450-10 (ASTM NO.65-45-12, GGG40, ISO450-10).
  30. Boiler Ash Door (gray iron) - on Oct 8, 2010
    The ask door is similar with boiler door, furnace door or stove door. Total weight for ash door assembly was about 60kg. Materials include cast iron with Cr. 1% and cast steel.
  31. How to select qualified iron casting suppliers in China - on Oct 7, 2010
    As for a new buyer and purchaser, you may not understand what kinds of iron casting suppliers are suitable for your products.
  32. Pump Body (cast steel) - on Oct 7, 2010
    Pump body is also known as pump casing, pump shell. Water pump body is usually made by gray iron (grey iron) HT200 (ASTM NO.30, GG20, ISO200, FC200, GC200).
  33. ISO 2768 Standard for Machining Tolerance - on Oct 6, 2010
    What standard can be used for the machining of iron and steel castings? We found many drawings or requirement files will require the ISO 2768 as the standard for the machining. Therefore, we have to go to internet to look for it.
  34. Brinell hardness (HB), Rockwell hardness (HRC) and Vicker hardness (VH) - on Oct 5, 2010
    What is Brinell hardness (HB)? What is rockwell hardness (HRC)? What is Vicker hardness (VH)? How to convert from HRC and VH to HB?
  35. DIN 1686 Standard for Rough Casting Tolerance - on Oct 5, 2010
    What standard can be used for the rough casting tolerance for iron, steel and aluminum castings? and how can find a free downloaded DIN 1686 standard?
  36. ZFS sand casings, precoated sand, hot precoated sand, shell molding - on Oct 4, 2010
    What is ZFS sand casings, precoated sand castings, hot precoated sand castings, hot shell and core molding process, shell molding process?
  37. ASTM A148 Standard for High Strength Cast Steel - on Oct 4, 2010
    This sheet is providing the chemical components and physical properties for the high strength cast steel by standard of ASTM A148.
  38. Surface Finish Degree (Smoothness) Comparison Table between Rz, Ra and RMS - on Oct 3, 2010
    What standard can be used for the surface finish degree, or we called smoothness degree for the iron and steel castings?
  39. Normal Material Comparison Table for Grey Cast Iron between DIN, ISO, ASTM and GB - on Oct 3, 2010
    As an metal casting manufacturer in China, how can we convert the foreign standard of grey iron (gray iron) castings into the standard in China?
  40. Normal Material Comparison Table for Ductile Cast Iron between DIN, ISO, ASTM and GB - on Oct 2, 2010
    As an metal casting manufacturer in China, how can we convert the foreign standard of ductile iron castings into the standard in China?
  41. How about the cast iron & pig iron prices in China? - on Oct 2, 2010
    As a metal foundry in China, we always keep our eyes on the updated pig iron prices. At the same time, we also provided the updated cast iron prices on Dandong Foundry's website.
  42. Comparison Table of Alloy Steel Casting Degrees for International - on Oct 1, 2010
    This sheet is providing the comparison for the alloy steel casting degrees between China, USA, Japan, Germany, England, France, Russia and ISO.
  43. Material Comparison Table DIN1691, 1693 and DIN EN 1561 (GG and EN-GJL or EN-GJS) - on Oct 1, 2010
    The purchasers and clients in Germany and Austria usually provided us the standard of DIN EN 1561. This is the old standard, and has been replaced by the new standard DIN 1691.
  44. The current situation and development of China cast iron valve products - on Oct 1, 2010
    Cast iron valves have nearly 100 years of history in China, but only has made significant development in the latest 10 years. According to statistics, in the latest 10 years, the domestic iron valves, fittings have annual production from 0.2 million tons to 0.8 million tons, the average annual increase rate is about 20%.



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