The Benefits of Heat Treatment

Heat tretament means that materials are heated, insulated and cooled in solid state to obtain the expeceted structure and mechanical properties.Heat treating can soften metal, to improve formability. It can make parts harder, to improve strength. Heat treating can improve wear resistance by hardening the material. Metals (including steel, titanium, inconel, and some copper alloys) can be hardened either on the surface (case hardening) or all the way through (through hardening), to make the material stronger, tougher, more durable and more resistant to wear. If any comments, please contact to talk about the heat treatment process.

Furan resin sand casting process

Why is the hard permeability of phenolurea resin self-hardening resin better than furan self-hardening resin sand? Because the curing process of phenol urea resin is a polymerization reaction, no small molecule water is produced during the curing process, and there is no problem of inconsistent curing speed inside and outside due to different volatilization speeds of moisture inside and outside the type.The curing process of furan self-hardening resin is In the polycondensation reaction, water is generated during the reaction.Because the evaporation rate of the water inside and outside the core is different, the curing speed of the inside and outside of the core is different, so its hardness and permeability are poor.This is also the reason why the curing speed of furan self-hardening resin sand is greatly affected by the relative humidity of the air. Precoated sand casting process is close to investment casting, suitable for small and medium metal casting parts, iron casting, steel casting, aluminum casting. Compared with other two sand casting methods, green sand molding process and resin sand molding process, the precoated sand castng is the most precision casting process with more casting accuracy and better surface finish. Please mail your inquiry to or

EN-GJL-150 or EN 1691 GG 15 grey cast iron

EN-GJL-150 or EN 1691 GG 15 grey cast ironEN-GJL-150 is one of grey cast iron in European standard EN 1561, it is also named as gray cast iron GG15 in standard DIN 1691 by Germany and Austria. The Grade is equivalent with grey iron GB/T 9439-1988 HT150, ASTM A 48, class 20, JIS G5501 FC15, NFA32-101 Ft.15D, BS1452 Gr.150, ISO/R185 Gr.15 in China and other countries. The chemical composition of GG15 gray cast iron is not standard. Baoding Guokun, the professional China casting foundry can adjust the chemical composition according to the production conditions, as long as we coouold meet the mechanical properties. EN 1691 GG 15 Mechanical properties:Tensile Strength: 150 Mpa minHardness: 150~200 Casting process for Gray iron GG15:Shell mold castingSand castingPrecoated sand castingGreen sand casting If you need custom grey iron castings for railway & train, auto parts, valve & piping, mining, heavy engineering, industrial engineering, engineering & construction, please contact to get the competitive prices.

ASTM A216 WCB carbon steel casting

ASTM A216 specification covers carbon steel castings for valves, flanges, fittings, or ther pressure-containing parts for high-temperature service and of quality suitable for assembly with other castings or wrought-steel parts by fusion welding.ASTM A216, WCA, WCB, WCC will be selected as per the design and service conditions, mechanical properties, and the high temperature characteristics.Today, we would like to introduce ASTM A216 WCB carbon steel. Chemical Composition:C%: 0.30 max; Mn%: 1.00 max; Si%: 0.60 max; S%: 0.045 max; P%: 0.040 max; Cu%: 0.30max; Ni%: 0.50 max; Cr%: 0.50 max; Mo%: 0.20 max Mechanical Properties:Tensile strength: 485-655 MpaYield strength: 250Mpa minElongation: 22% minReduction of area: 35% min Heat Treatment process:Generally, all ASTM A216 WCB carbon steel castings need to be anneal or nomalization.Anneal at 890-910°CNormalization at 870-890°C Casting process:Sand castingInvestment castingShell mold casting Guokun Casting, of Baoding Hebei is an ISO 9001-2008 registered iron and steel foundry & supplier of high quality carbon steel, alloy steel, stainless steel, wear resistant steel castings, gray iron casting, ductile iron casting, protype castings and machhined castings used in Power, Mining, Transporation, Agricultural, Automobile, bus and truck parts, valves, oil & Gas steel castings, Pipe Fittings and Gear Industry. With a montly capacity of 10,000kgs and with more than 15 years of experience ensure the short delivery and the highest valued iron & steel casting parts. Ours Mission It is our mission to provide flexible, cost effective solutions for our customers on time, every time while maintaining the highest standrds of quality. If you need any custom steel casting components, please contact or to get the competitive prices!

Gray iron castings in ASTM A48 Class 20

Gray iron castings in ASTM A48 Class 20 are intended for general engineering use where tensile strength is a major consideration.The grade is equivalent with grey irn GB/T 9439-1988 HT150, DIN 1691 GG15, JIS G5501 FC15, NFA32-101 Ft.15D, BS1452 Gr.150, ISO/R185 Gr.15 in China and other countries. Chemical Composition:C:3.0~3.6 S:≤0.12 P:<0.15 Mn:0.6~1.0 Si:1.4~2.0Please note that this chemical composition is not standard, just from working experience of our iron casting foundry. Mechanical propertiesASTM A48 Class 20 gray iron has a minimum tensile strength of 20,000 psi (140 MPa). Class 20 has a high carbon equivalent and a ferrite matrix. Grey cast iron ASTM 148 Class 20 can be produced by using the following casting process:Sand castingShell mold castingLost foam casting The custom casting components in ASTM A48 Class 20 are these unimportant casting parts with low duty or load, such as boiler parts, covers, wheel, base plate, weight plate, pump body, valve body, pipe fittings, etc