Product

Gray Iron Casting: Clay Sand Casting Exhaust Mainfold

Leesh Holings – Cast Iron Foundry specialize in sand casting process for gray iron casting and Ductile Iron Casting services.

Through decades years development, we have accumulated abundant experience of various iron casting standards’ production.

Capable but not limited as the following Ductile Iron Casting material grade:

China GB standards for Gray Iron Casting:

Main Standard: GB/T 9439-2023
Title: Grey iron castings
Replaces: GB/T 9439-2010
Adoption of International Standard: NEQ (Not Equivalent) to ISO 185:2020
Implementation Date: September 7, 2023
Material Grades
By Material Strength Level (8 grades):
HT100 (100 MPa), HT150 (150 MPa), HT200 (200 MPa), HT225 (225 MPa)
HT250 (250 MPa), HT275 (275 MPa), HT300 (300 MPa), HT350 (350 MPa)

China, USA, Europe, Australia Gray Iron Grade Equivalents

Tensile Strength (MPa)	China (GB/T 9439-2023)	USA (ASTM A48)	Europe (EN 1561)	Australia (AS 1830)
100	HT100	—	EN-GJL-100	—
150	HT150	Class 20 Class 25	EN-GJL-150	T150
200	HT200	Class 30	EN-GJL-200	T220
225	HT225	—	—	—
250	HT250	Class 35	EN-GJL-250	T260
275	HT275	—	—	—
300	HT300	Class 40 Class 45	EN-GJL-300	T300
350	HT350	Class 50	EN-GJL-350	T350
400	—	Class 55 Class 60	—	T400

Additional Gray Iron Standards Comparison

China (GB/T 9439)	Japan (JIS G5501)	Germany (DIN 1691)	France (NF A32-101)	UK (BS 1452)
HT100	FC100	—	—	100
HT150	FC150	GG15	FGL150	150
HT200	FC200	GG20	FGL200	200
HT250	FC250	GG25	FGL250	250
HT300	FC300	GG30	FGL300	300
HT350	FC350	GG35	FGL350	350
—	—	GG40	FGL400	—

Manufacturing Method	Sand Casting(Resin Sand, Pre-Coated Sand, Clay Sand, Water glass sand, Green Sand,lost foam )
Material Standard	GB, ANSI, BS, DIN, JIS, ASTM, ASME, AISI, etc carbon steel, low carbon steel, middle carbon steel, G35, G45, WCB, WCA, WCC, ISO 340-550, etc. Alloy Carbon steel: G25CrMo4, Heat Resistant Steel, etc. Stainless Steel: SUS 304, 304L, 316, 316L, CF8, CF8M, G-X7CrNiNb1189, etc. AS2074 or according to customer specific requirement. Ductile Iron:A536-Gr.60-40-18,GGG40,GGG50,FCD40,FCD50,Gr370-17,Gr420-12,etc Grey Iron:A48-No.20,25,30,GG10,GG15,GG20,FC10,FC15,FC20,Grade 150,180,220,FGL150,FGL200,FGL250,etc
Weight Range	1 kg to 100 Tons
General Casting Tolerance	CT8-CT12
Design Software	UG, Pro-E, Inventor
Dwg Format	STP, STEP, IGS,STP,X_T ,DXF,DWG , Pro/E, PDF, SLDPRT
Mould Manufacturing	Yes
Casting Stimulation	Yes
Ultimate machining tolerance	0.005mm
Quality Control	RT,UT,MT,PT,CMM,SCAN,Chemical and Mechanical Property Testing,Spectrometer,etc
Finish Roughness	Ra12.5-Ra25 according to customer requirement
Logo/ID	Silk-screening, Laser Marking, Engrave,Painting
Heat Treatment	Normalization, Annealing, Quenching and Tempering, Case Hardening, Nitriding, Carbon Nitriding, Induction Quenching,etc
Surface Treatment	Shot/sand blast, Polishing, Surface Passivation, Painting , Anodizing,Powder coating, ED- Coating, Chrome Plating, zinc-plate, Dacromat coating, Finish Painting,hot-dip galvanizing, etc

Common FAQs About Leesh Sand Casting

1. What is sand casting?

Sand casting is a casting method that uses sand as the molding material to produce castings. It is widely used due to its advantages such as readily available and low-cost materials, simple equipment, easy operation, and no restrictions on casting alloy types, shapes, sizes, or production scales.

2. What materials can Leesh supply for sand casting?

Leesh provides various materials including Carbon Steel, Alloy Steel, Stainless Steel, Grey Iron, and Ductile Iron. These materials comply with international and national standards such as ASTM, SAE, AISI, ACI, DIN, EN, ISO, and GB.

3. What is the weight range of castings Leesh can produce?

Cast Steel: 50Kg – 25,000Kg
Cast Iron: 0.1Kg – 3,000Kg

4. What sand casting processes does Leesh adopt?

For Cast Steel: Water glass sand, resin sand, coated resin sand (Hot-Box & Shell Molding)
For Cast Iron: Resin sand, green sand

5. What are the key technical specifications of Leesh’s Green sand casting?

Dimensional tolerance: CT8–CT12 (per ISO 8062)
Surface roughness: Ra 6.3–25 μm
Max part weight: 0.1 kg – 25,000 kg

6. Which industries does Leesh’s sand casting serve?

Leesh’s sand casting solutions are suitable for diverse industries including construction, machinery, automotive, and energy.

7. Why choose Leesh’s sand casting services?

Cost-effective for both small and large production runs
Compatible with a wide range of metals and alloys
Flexible in design and size customization
Shorter lead times for prototype development and bulk production

https://twitter.com/chinafoundry/status/2000821788276875534