Product

Spheroidal graphite cast iron | High Strength SG Castings

Spheroidal graphite cast iron(SG Cast Iron) also know as ductile cast iron or nodular cast iron

1. Main Standards Overview

Standard	Region	Full Name
ISO 1083	International	Spheroidal graphite cast irons — Classification
EN 1563	Europe	Spheroidal graphite cast irons
ASTM A536	USA / North America	Ductile Iron Castings
GB/T 1348	China	Spheroidal graphite cast iron castings

2. Equivalent Grades & Mechanical Properties

ISO 1083	EN 1563	ASTM A536	GB/T 1348	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Typical Structure
400-18	EN-GJS-400-18	60-40-18	QT400-18	≥ 400	≥ 250	≥ 18	Ferritic
450-10	EN-GJS-450-10	65-45-12	QT450-10	≥ 450	≥ 310	≥ 10	Ferritic-Pearlitic
500-7	EN-GJS-500-7	70-50-05	QT500-7	≥ 500	≥ 320	≥ 7	Pearlitic-Ferritic
600-3	EN-GJS-600-3	80-55-06	QT600-3	≥ 600	≥ 370	≥ 3	Pearlitic
700-2	EN-GJS-700-2	100-70-03	QT700-2	≥ 700	≥ 420	≥ 2	Pearlitic / Quenched

3. Key Differences Between Standards

Item	ISO 1083	EN 1563	ASTM A536	GB/T 1348
Naming Rule	Strength – Elongation	EN-GJS-XXX-YY	Tensile-Yield-Elongation (ksi)	QTXXX-YY
Main Basis	Mechanical properties	Mechanical properties	Mechanical properties	Mechanical properties
Impact Test	Optional	Mandatory for LT grades	Optional	Optional
Application	Global	Europe	North America	China

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

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