Standard Specification for Austempered Ductile Iron Castings
ASTM A897/A897M Austempered Ductile Iron Castings Grades
The mechanical property requirements for various grades of Austempered Ductile Iron Castings (ADI Castings) , as defined by the ASTM A 897/A 897M-03 standard. These materials are known for their exceptional strength-to-weight ratio and wear resistance, achieved through a specific heat treatment process.
Table 1 Mechanical Property Requirements (Inch-Pound Units) of Austempered Ductile Iron Castings
The table below presents the minimum mechanical properties required for different Austempered Ductile Iron Castings ADI grades when measured in inch-pound units.
| Property | Grade 130/90/09 | Grade 150/110/07 | Grade 175/125/04 | Grade 200/155/02 | Grade 230/185/01 |
|---|---|---|---|---|---|
| Tensile strength, min, ksi | 130 | 150 | 175 | 200 | 230 |
| Yield strength, min, ksi | 90 | 110 | 125 | 155 | 185 |
| Elongation in 2 in., min, % | 9 | 7 | 4 | 2 | 1 |
| Impact energy, ft-lb
Ato the cap A-th power
𝐴 |
75 | 60 | 45 | 25 | 15 |
| Typical hardness, HBW, kg/mm² | 269–341 | 302–375 | 341–444 | 388–477 | 402–512 |
𝐴
Unnotched charpy bars tested at 72 ± 7°F. The values in the table are a minimum for the average of the highest three test values of the four tested samples.
Table 1 Mechanical Property Requirements (SI Units) of Austempered Ductile Iron Castings
For international use and scientific contexts, the standard also provides equivalent values in SI units (Système International d’Unités).
| Property | Grade 900/650/09 | Grade 1050/750/07 | Grade 1200/850/04 | Grade 1400/1100/02 | Grade 1600/1300/01 |
|---|---|---|---|---|---|
| Tensile strength, min, MPa | 900 | 1050 | 1200 | 1400 | 1600 |
| Yield strength, min, MPa | 650 | 750 | 850 | 1100 | 1300 |
| Elongation in 50 mm, min, % | 9 | 7 | 4 | 2 | 1 |
| Impact energy, J
Ato the cap A-th power
𝐴 |
100 | 80 | 60 | 35 | 20 |
| Typical hardness, HBW, kg/mm² | 269–341 | 302–375 | 341–444 | 388–477 | 402–512 |
𝐴
Unnotched charpy bars tested at 22 ± 4°C. The values in the table are a minimum for the average of the highest three test values of the four tested samples.
| 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
