OEM Custom Gray Cast Iron Sand Casting Part from China Iron Foundry with Green Sand Casting and Shell Mold Casting Processes

Grey cast iron (also called grey cast iron) is a group of cast iron including several kinds of grade according to different designation of diverse standards. Gray cast iron is a kind of iron-carbon alloy and it gets its name "grey" from the fact that their cutting sections looks grey. The metallographic structure of gray cast iron is mainly composed of flake graphite, metal matrix and grain boundary eutectic. During the grey iron, the Carbon is in the flake graphite. As one of the widely used casting metals, cast gray iron has many advangates in costs, castability and machinablity.

Mechanical Properties of Gray Cast Iron
Item according to DIN EN 1561	Measure	Unit	EN-GJL-150	EN-GJL-200	EN-GJL-250	EN-GJL-300	EN-GJL-350
Item according to DIN EN 1561	Measure	Unit	EN-JL 1020	EN-JL 1030	EN-JL 1040	EN-JL 1050	EN-JL 1060
Tensile Strength	Rm	MPA	150-250	200-300	250-350	300-400	350-450
0.1% Yield Strength	Rp0,1	MPA	98-165	130-195	165-228	195-260	228-285
Elongation Strength	A	%	0,3 – 0,8	0,3 – 0,8	0,3 – 0,8	0,3 – 0,8	0,3 – 0,8
Compressive Strength	σdB	MPa	600	720	840	960	1080
0,1% Compressive Strength	σd0,1	MPa	195	260	325	390	455
Flexural Strength	σbB	MPa	250	290	340	390	490
Schuifspanning	σaB	MPa	170	230	290	345	400
Shear Stress	TtB	MPa	170	230	290	345	400
Modules of elasticity	E	GPa	78 – 103	88 – 113	103 – 118	108 – 137	123 – 143
Poisson number	v	–	0,26	0,26	0,26	0,26	0,26
Brinell hardness		HB	160 – 190	180 – 220	190 – 230	200 – 240	210 – 250
Ductility	σbW	MPa	70	90	120	140	145
Tension and pressure change	σzdW	MPa	40	50	60	75	85
Breaking Strength	Klc	N/mm3/2	320	400	480	560	650
Density		g/cm3	7,10	7,15	7,20	7,25	7,30

▶ Raw Materials Available for Sand Casting

Gray Iron: GG-10 ~ GG-35, GJL-100, GJL-150, GJL-200, GJL-250, GJL-300, GJL-350, HT100 ~ HT350.

Ductile Iron: GJS-400-18, GJS-40-15, GJS-450-10, GJS-500-7, GJS-600-3, GJS-700-2, GJS-800-2

Aluminium and Their Alloys

Carbon Steel, Alloy Steel, Stainless Steel or other Materials and Standards on request

▶ Capabilities of Sand Casting moulded by hand at RMC's Iron Foundry

Sand Casting Max Size: 1,500 mm × 1000 mm × 500 mm

Weight Range: 0.5 kg - 500 kg

Annual Capacity: 5,000 tons - 6,000 tons

Tolerances: On Request.

▶ Capabilities of Sand Casting by Automatic Molding Machines at RMC's Sand Foundry

Max Size: 1,000 mm × 800 mm × 500 mm

Weight Range of Sand Castings: 0.5 kg - 500 kg

Annual Capacity: 8,000 tons - 10,000 tons

Tolerances: On Request.

▶ Main Production Procedure of Sand Casting

Patterns & Tooling Design → Making Patterns → Moulding Process → Chemical Composition Analysis → Melting & Pouring → Cleaning, Grinding & Shot Blasting → Post Processing or Packing for Shipment

▶ Sand Casting Inspection Capabilities

Spectrographic and manual quantitative analysis

Metallographic analysis

Brinell, Rockwell and Vickers hardness inspection

Mechanical property analysis

Low and normal temperature impact testing

Cleanliness inspection

UT, MT and RT inspection

▶ Post-Casting Process

Deburring & Cleaning

Shot Blasting / Sand Peening

Heat Treatment: Normalization, Quench, Tempering, Carburization, Nitriding

Surface Treatment: Passivation, Andonizing, Electroplating, Hot Zinc Plating, Zinc Plating, Nickel Plating, Polishing, Electro-Polishing, Painting, GeoMet, Zintec

Machining: Turning, Milling, Lathing, Drilling, Honing, Grinding

▶ General Commerial Terms

Main workflow: Inquiry & Quotation → Confirming Details / Cost Reduction Proposals → Tooling Development → Trial Casting → Samples Approval → Trial Order → Mass Production → Continuous Order Proceeding

Leadtime: Estimatedly 15-25 days for tooling development and estimatedly 20 days for mass production.

Payment Terms: To be negotiated.

Payment methods: T/T, L/C, West Union, Paypal.

Advantages of Sand Casting Process

· Low Cost due to its cheap and recyclable mold materials and simple production equipment.

· Wide range of unit weight from 0.10 kg to 500 kgs or even bigger.

· Various Structure from simple type to complex type.

· Suitable for production requirements of various quantity.

cast iron foundry in China

Capabilities for Casting at RMC
Casting Process		Annual Capacity / Tons	Main Materials	Casting Weights	Dimensional Tolerance Grade of Castings (ISO 8062)	Heat Treatment
Green Sand Casting		6000	Cast Gray Iron, Cast Ductile Iron, Cast Aluminium, Brass, Cast Steel, Stainless Steel	0.3 kg to 200 kg	CT11~CT14	Normalization, Quenching, Tempering, Annealing, Carburization
Shell Mold Casting				0.66 lbs to 440 lbs	CT8~CT12
Lost Wax Investment Casting	Water Glass Casting	3000	Stainless Steel, Carbon Steel, Steel Alloys, Brass, Cast Aluminium, Duplex Stainless Steel	0.1 kg to 50 kg	CT5~CT9
				0.22 lbs to 110 lbs
	Silica Sol Casting	1000		0.05 kg to 50 kg	CT4~CT6
				0.11 lbs to 110 lbs
Lost Foam Casting		4000	Gray Iron, Ductile Iron, Steel Alloys, Carbon Steel, Stainless Steel	10 kg to 300 kg	CT8~CT12
				22 lbs to 660 lbs
Vacuum Casting		3000	Gray Iron, Ductile Iron, Steel Alloys, Carbon Steel, Stainless Steel	10 kg to 300 kg	CT8~CT12
				22 lbs to 660 lbs
High Pressure Die Casting		500	Aluminium Alloys, Zinc Alloys	0.1 kg to 50 kg	CT4~CT7
				0.22 lbs to 110 lbs