AS2074 L6 is a kind of low-alloy nickel-chromium-molybdenum cast steel of Australian Standard, features of its toughness, impact performance and moderate hardness, and is widely used in engineering castings subject to impact loads.
Suitable Casting Types:
| Application Category | Typical Castings | Performance Requirements |
|---|---|---|
| General Engineering | Drive levers, connecting rods, cams, gears, shaft components | High toughness, good machinability, moderate strength |
| Tools and Moulds | Cold working dies, stamping dies, punches, die bases | Excellent impact toughness, wear resistance, resistance to chipping |
| Mining Machinery | Crusher parts, vibrating screen components, conveyor equipment parts | Impact resistance, fatigue resistance, moderate wear resistance |
| Agricultural Machinery | Tractor suspension systems, harvester blades, farm machinery components | Impact resistance, deformation resistance, good weldability |
| Others | Forging equipment parts, construction machinery structural parts, railway vehicle components | Balanced high toughness and strength, good heat treatment response |
AS2074 L6 Equivalent Grades in International Standards
| Standard System | Corresponding Grade | Standard Number | Key Notes |
|---|---|---|---|
| ASTM (US) | AISI L6 (Cast Steel) | ASTM A27/A148 | Substantially consistent with AS 2074 L6 in chemical composition; a nickel-chromium-molybdenum low-alloy tool steel suitable for casting forming |
| EN (EU) | 1.2714 (W.Nr.) | EN 10293 | Corresponding to 55NiCrMoV7, close in composition and performance, widely used in large die castings |
| EN (EU) | 1.2713 | EN 10293 | Corresponding to 55NiCrMoV6, slight composition difference from L6 but equivalent performance |
| GB (China) | ZG5CrNiMo | GB/T 11352 | Cast steel grade, matching AS 2074 L6 in chemical composition, suitable for heavy castings under impact loads |
| GB (China) | 5CrNiMo | GB/T 1299 | Forged steel grade, widely used in mould manufacturing, equivalent in performance to L6 |
AS2074 L6 Chemical Composition (Cast Analysis, Maximum Value, Unit: %)
| Element | AS2074 L6 | AS 2074/L6A-1 | AS 2074/L6A-2 | AS 2074/L6B-1 | AS 2074/L6B-2 | AS 2074/L6C |
|---|---|---|---|---|---|---|
| Carbon | 0.35 | – | – | – | – | – |
| Phosphorus | 0.050 | 0.050 | 0.050 | 0.040 | 0.040 | 0.030 |
| Sulfur | 0.050 | 0.050 | 0.050 | 0.040 | 0.040 | 0.030 |
| Aluminium | – | 0.06 | 0.06 | 0.06 | 0.06 | 0.06 |
Heat Treatment Requirements
- Castings of Grade AS2074 L6: May be supplied in either the normalized and tempered or hardened and tempered (quenched and tempered) condition;
- Remaining sub-grades (L6A-1, L6A-2, L6B-1, L6B-2, L6C): Shall be supplied in the hardened and tempered (quenched and tempered) condition (see Clause 1.8 for details).
AS2074 L6 Mechanical Properties (Test pieces shall be selected, prepared and tested in accordance with the requirements of Section I)
| Performance Index | AS2074 L6 | AS 2074/L6A-1 | AS 2074/L6B-1 | AS 2074/L6B-2 | AS 2074/L6C |
|---|---|---|---|---|---|
| Tensile Strength (MPa) | 620 | 700 | 750 | 825 | 1000 |
| Yield Strength (MPa, Minimum) | 415 | 495 | 590 | 690 | – |
| Elongation on 5.65√SO (% , Minimum) | 19 | 11 | – | 12 | 6 |
| Charpy Impact Value (J, Minimum) | – | 27 | 20 | – | – |
- If castings require a specified reduction of area, the minimum percentage shall be determined and shall comply with the provisions for the corresponding grade (specific values not fully listed in the document);
- For special or supplementary test requirements, refer to Paragraph A2 of Appendix A.
| Manufacturing Method | Investment Casting Services(Lost Wax Casting) |
| 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, AS2074 or according to customer specific requirement. Copper, Brass, Bronze |
| Weight Range | 0.01 kgs to 100 kgs |
| Cast Hole Min. Dia. | Ø2mm |
| General Casting Tolerance | CT4-CT7 |
| 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 | Ra1.6-Ra3.2 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 |
Investment casting Services , also known as lost wax casting, is a casting method in which a pattern is made of a melt-able material, then coated with several layers of refractory material to form a shell, and the pattern is melted away after high-temperature firing, and then the molten metal is poured into the shell.
Investment casting have high precision and high surface quality, with small machining allowances, which can achieve less or no machining requires. Investment casting can cast complex thin-walled parts with complex shapes (the minimum wall thickness can reach 0.25-0.4mm), and the smallest hole diameter can reach 2.5mm.
The process normal as below:
Drawing Review ->Tooling Designing ->Tooling Manufacturing ->Wax Pattern Making ->Pattern Tree Assembly ->Dipping and Coating ->De-waxing and Firing- Pouring-Knockout ->Grinding ->Heat Treatment -> Machining(if requires) ->Inspection->Delivery
Leesh holdings is the key leading supplier of investment cast parts to both China market and global market.Through many years development, our casting parts now services in railway, automobile and truck, construction machinery, mining machinery, forklift truck, agricultural machinery, ship, petroleum machinery, construction, pump valve, mechanical and electrical, hardware tools, electric power equipment, etc.
Leesh capability
Method: Investment Casting, Lost Wax Casting, Precision Casting
| Process Description | Process Control | |||
| Mass(kgs) | General Tolerance Standard | Casting Tolerance(CT) | Surface Rougness(μm) | |
| Silicon Sol | 0.05-50 | ISO 8062 | CT4-CT6 | Ra 3.2～6.3 μm |
| Water Glass | 0.10-100 | ISO 8062 | CT6-CT8 | Ra 6.3～12.5 μm |
Material:
Stainless Steel (General SUS304, SUS316, 1.4301), etc.,
Stainless Iron (General 201, 420, 430), etc.,
High/Middle/Low Carbon Steel (A3, Q235, 45), etc.,
Alloy Steel (General 20cr, 20crmo, 20crnimo, 40cr, 40crmo, 40crnimo, 42cr, 42crmo, 42crnimo) etc.,
Brass (H59, H62, H75, H80), etc.,
Red Copper, Bronze, White Copper and other materials.
The above list Is For Reference Only, If You Have Special Needs, Please Contact Customer Service Staff.
Post Casting Process:
Ordinary Polishing, Mirror Polishing, Electrolytic Polishing, Brushed Finishing, Grinding, Heat Treatment, Finishing, Drilling and Tapping,Plating, etc
Surface Treatment:
polishing, powder coating, zinc plating, chrome plating,heat treatment,tumbling polishing, electro-polishing.
We understand your concerns about the quality, we have bought full sets of advanced inspection facilities,Spectrum analyzer, metallographic microscope, tensile testing machine, low temperature impact testing machine, X-ray flaw detection machine, magnetic particle flaw detection machine, ultrasonic flaw detection machine, coordinate measuring instrument, image measuring instrument. The above equipment can ensure the supply of high-standard precision castings to customers, and meet customers’ comprehensive testing requirements for physical and chemical properties of materials, non-destructive defect testing, and high-precision geometric size testing.
https://chinafoundrygroup.com/investment-casting-service/
