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Alloy Steel Lost Wax Casting Manufacturer – Custom Sand Casting of Grey Cast Iron – RMC Foundry

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Cast alloy steel should be used when the strength of the casting is relatively high and the use of cast iron cannot meet the requirements. However, the fluidity of molten steel of cast steel is not as good as that of cast iron, so the thickness of the pouring structure should not be too small and the shape should not be too complicated. When the silicon content is controlled at the upper limit, the fluidity of molten steel can be improved. 


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Alloy Steel Lost Wax Casting Manufacturer – Custom Sand Casting of Grey Cast Iron – RMC Foundry Detail:

China OEM custom sand castings of grey iron with CNC machining services. Gray cast iron is the ferrous metal whose cementite decomposes into iron and carbon in the form of graphite which is called graphitization cast irons where a large percentage of cementite is decomposed by graphitization.

 

Gray Iron Material Grades
Country Standard Equivalent Grades of Grey Iron (Gray Cast Iron)
ISO ISO 185 100 150 200 250 300 350
China GB 9439 HT100 HT150 HT200 HT250 HT300 HT350
USA ASTM A48 - NO.20 NO.30 NO.35 NO.40 NO.50
NO.25 NO.45
Germany DIN 1691 GG10 GG15 GG20 GG25 GG30 GG35
Austria
European EN 1561 EN-GJL-100 EN-GJL-150 EN-GJL-200 EN-GJL-250 EN-GJL-300 EN-GJL-350
Japan JIS G5501 FC100 FC150 FC200 FC250 FC300 FC350
Italy UNI 5007 G10 G15 G20 G25 G30 G35
France NF A32-101 - FGL150 FGL200 FGL250 FGL300 FGL350
UK BS 1452 100 150 200 250 300 350
India IS 210 - FG150 FG200 FG260 FG300 FG350
Spain UNF - FG15 FG20 FG25 FG30 FG35
Belgium NBN 830-01 FGG10 FGG15 FGG20 FGG25 FGG30 FGG35
Australia AS 1830 - T150 T220 T260 T300 T350
Sweden SS 14 01 O110 O115 O120 O125 O130 O135
Norway NS11 100 SJG100 SJG150 SJG200 SJG250 SJG300 SJG350
Min. Tensile Strength (Mpa) 100 150 200 250 300 350

Performance Characteristics of Gray Iron Castings:
• Liquid gray iron has good fluidity, and its volume shrinkage and linear shrinkage are small, and the notch sensitivity is small
• Low comprehensive mechanical properties, compressive strength is about 3~4 times higher than tensile strength
• Good shock absorption, the shock absorption of gray iron is about 10 times greater than that of cast steel
• Gray iron has low modulus of elasticity

Structural Characteristics of Gray Iron Castings:
• Small wall thickness and complex shapes are available
• The residual stress of the casting is small
• Gray iron castings should not be designed with very thick structures, and asymmetrical sections are often used to make full use of their compressive strength

Sand casting process offers the greatest flexibility and the most cost-effective tooling. Our sand casting foundry is equipped with a complete metallurgical laboratory to determine the chemical and mechanical characteristics of each melt and to analyse the metallugic condition of the molten metal before pouring. Microsections are examined under the microscope to obtain final information on the solified casting. We issue 3.1 certificate for each delivered part on customer request. Cast irons are the ferrous alloys which have carbon contents of more than 2%. Though cast irons can have a carbon percentage between 2 to 6.67, the practical limit is normally between 2 and 4%. These are important mainly because of their excellent casting qualities. The gray cast irons and ductile cast irons (also called nodular cast iron or spheroidal graphite iron).

Our Advantages in Sand Casting Field:
• Tens of years of experience in sand casting, shell molding casting and machining technology.
• Dimensionally accurate cores for complex internal contours.
• Extensive consulting which starts in the design phase.
• Quality management throughout the production process and maximum process reliability.

Available Grade of Gray Iron at RMC Sand Casting Foundry:  HT150, HT200, HT250, HT300, HT350; GJL-100, GJL-150, GJL-200, GJL-250, GJL-300, GJL-350; GG10~GG40.

RMC, a China iron foundry, is producing various grey iron casting products for overseas customers in USA, Australia, UK, Spain, Germany, Norway, Finland, Russia and Italy. Production according to standards ASTM A48, A536; DIN 1691, 1693; ISO 185, 1083; EN 1561, 1563; DIN 1691, 1693; AS 1830, 1831; JIS, UNI, NF, BS, UNF, NBN, AS, SS, NS. Material grades including:

ISO185: 100 150 200 250 300
ASTM A48: NO.20 NO.25 NO.30 NO.35 NO.40 NO.45
DIN 1691: GG10 GG15 GG20 GG25 GG30
EN 1561: EN-GJL-100 EN-GJL-150 EN-GJL-200 EN-GJL-250 EN-GJL-300
BS 1452: 100 150 200 250 300
AS 1830: T150 T220 T260 T300

Gray Iron Comparison Casting Wall Thickness/mm Chemical Composition(%) Microstructure(Volume Fractions)(%)
China(GB/T 9439) ISO 185 ASTM A48/A48M EN 1561 C Si Mn P ≦ S ≦ Matrix Structure
HT100 (HT10-26) 100 No.20 F11401 EN-GJL-100 - 3.4-3.9 2.1-2.6 0.5-0.8 0.3 0.15 Pearlite: 30-70%, coarse flakes; Ferrite: 30-70%; Binary Phosphorus Eutectic: <7%
HT150 (HT15-33) 150 No.25A F11701 EN-GJL-150 <30     30-50     >50 3.3-3.5 3.2-3.5 3.2-3.5 2.0-2.4 1.9-2.3 1.8-2.2 0.5-0.8 0.5-0.8 0.6-0.9 0.2 0.12 Pearlite: 40-90%, medium coarse flakes; Ferrite: 10-60%; Binary Phosphorus Eutectic:<7%
HT200 (HT20-40) 200 No.30A F12101 EN-GJL-200 <30     30-50     >51 3.2-3.5 3.1-3.4 3.0-3.3 1.6-2.0 1.5-1.8 1.4-1.6 0.7-0.9 0.8-1.0 0.8-1.0 0.15 0.12 Pearlite: >95%, medium flakes; Ferrite<5%; Binary Phosphorus Eutectic<4%
HT250 (HT25-47) 250 No.35A F12401 No.40A F12801 EN-GJL-250 <30     30-50     >52 3.0-3.3 2.9-3.2 2.8-3.1 1.4-1.7 1.3-1.6 1.2-1.5 0.8-1.0 0.9-1.1 1.0-1.2 0.15 0.12 Pearlite: >98% medium thin flakes; Binary Phosphorus Eutectic:<2%
HT300   (HT30-54) 300 No.45A F13301 EN-GJL-300 <30     30-50     >53 2.9-3.2 2.9-3.2 2.8-3.1 1.4-1.7 1.2-1.5 1.1-1.4 0.8-1.0 0.9-1.1 1.0-1.2 0.15 0.12 Pearlite: >98% medium thin flakes; Binary Phosphorus Eutectic:<2%
HT350   (HT35-61) 350 No.50A F13501 EN-GJL-350 <30     30-50     >54 2.8-3.1 2.8-3.1 2.7-3.0 1.3-1.6 1.2-1.5 1.1-1.4 1.0-1.3 1.0-1.3 1.1-1.4 0.1 0.1 Pearlite: >98% medium thin flakes; Binary Phosphorus Eutectic:<1%

Production Process:
Sand Casting, Automatic Molding, Machine Molding, Shell Molding, Green Sand Casting, Resin Sand Casting”

Gray Iron Applications:
The following is the common application for each degree of grey cast iron for your reference.

HT100 (GG10, EN-GJL-100):
For small loads, the friction and wear no special requirements for important castings, such as protective cover, cover, oil pan, hand wheels, frame, floor, hammer, small handle, etc.

HT150 (GG15, EN-GJL-150):
Under moderate load of castings, such as the base, frame, box, knife, bed, bearing seat, table, wheels, cover, pump, valve, pipe, flywheel, motor blocks and other

HT200 (GG20, EN-GJL-200):
Requirements withstand greater load and a certain degree of tightness or corrosion resistance of the more important castings such as cylinder, gear, base, flywheels, bed, cylinder block,cylinder liner, piston, gear box, brake wheel, coupling Plate, medium pressure valve, etc.

HT300(GG30, EN-GJL-300):
Under high load, wear and high air tightness important castings, such as heavy machine tools, shears, presses, automatic lathe bed, frame, frame, high-pressure hydraulic parts, piston rings, force larger gear, Cams, bushings, large engine crankshaft, cylinder block, cylinder liner, cylinder head, etc.

Metal and Alloys  Grade for Sand Casting
Sand Casting Equipment at RMC Foundry
Sand castings of cast iron

Custom Sand Castings of Cast Iron


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  • The company keeps to the operation concept "scientific management, high quality and efficiency primacy, customer supreme", we have always maintained business cooperation. Work with you,we feel easy!
    5 Stars By Melissa from London - 2018.09.29 13:24
    The supplier abide the theory of "quality the basic, trust the first and management the advanced" so that they can ensure a reliable product quality and stable customers.
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