Product

ASTM A890 Grade 3A Sand Casting

Name: ASTM A890 Grade 3A Duplex Stainless Steel
Brand: Leesh

ASTM A890 Grade 3A Duplex Stainless Steel- Leesh Sand Casting Material

ASTM A890 Grade 3A (UNS J93371, ACI CD6MN) is a 25Cr-5Ni-Mo-N cast duplex stainless steel.

ASTM A890/A890M is the American standard for corrosion-resistant cast iron-chromium-nickel-molybdenum duplex (austenitic + ferritic) stainless steel. Grade 3A is a classic grade under this specification, equivalent to ACI CD6MN and UNS J93371, and also complies with ASTM A995 Grade 3A casting requirements.

Leesh through professional sand casting process +SOP control raw material handing + strictly chemical material control + enhance with our AOD = Pefect Duplex Stainless Steel Castings

ASTM A890 Grade 3A Duplex Stainless Steel – Equivalence List

Region	Standard System	Grade / Number	Composition Match
USA	ASTM / ACI / UNS	A890 3A / CD6MN / J93371	Base grade
EU	EN / DIN	1.4460 (X3CrNiMoN27-5-2)	Very close (wrought)
EU	EN	EN 10283 (cast grade)	Cast equivalent
ISO	ISO	ISO 13472 GX25CrNiMoN25-5-2	Direct cast equivalent
China	GB / JB	ZG03Cr25Ni6Mo2N	Near-identical cast grade
Australia	AS	AS 1830 CD6MN / AS 4950 3A	Identical designation

Manufacturing Method	Sand Casting(Resin Sand, Procated Sand Stack Castings, Clay Sand, Water glass sand, Green Sand,lost foam )
Material Standard	GB, ANSI, BS, DIN, JIS, ASTM, ASME, AISI, etc ASTM A890 Grade 3A,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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