AISI 8630 is a kind of nickel-chromium-molybdenum low-alloy medium carbon steel, and has the balance between strength and toughness,excellent hardenability, and superior fatigue resistance.
We are producing many kinds of AISI 8630 casting for agriculture,Connectors, hangers, gate valves, Crankshafts, camshafts, connecting rods, hydraulic parts, molds etc.
AISI 8630 advantages:
1-Balanced strength and toughness
2-Excellent hardenability
3-Fatigue resistance
4-Good machinability
5-Favorable weldability
AISI 8630 International Equivalent Grades
| Standard System | Equivalent Grade |
|---|---|
| DIN/EN | 1.6545, 30NiCrMo2-2 |
| AFNOR | 30NCD2 |
| UNI | 30NiCrMo2KB |
| JIS | SNCM230 |
| GB (China) | 30CrNiMo2A |
| AISI/SAE | 8630, 8630H |
Ⅰ. Basic Information & Chemical Composition
| Element | Content Range (%) | Function |
|---|---|---|
| C (Carbon) | 0.28-0.33 | Provides fundamental strength and hardness |
| Mn (Manganese) | 0.65-0.95 | Improves hardenability and mechanical strength |
| Cr (Chromium) | 0.40-0.60 | Enhances hardness, wear resistance and hardenability |
| Ni (Nickel) | 0.35-0.75 | Boosts toughness, ductility and fatigue resistance |
| Mo (Molybdenum) | 0.15-0.25 | Improves high-temperature strength, hardness and creep resistance |
| Si (Silicon) | 0.15-0.30 | Deoxidizes the steel and increases structural strength |
| P (Phosphorus) | ≤0.035 | Impurity element, need strict low-level control |
| S (Sulfur) | ≤0.040 | Impurity element that impairs material toughness |
| Fe (Iron) | 96.7-98.0 | Matrix element of the steel |
Ⅱ. Physical & Mechanical Properties
| Property | Metric Value | Imperial Value |
|---|---|---|
| Density | 7.85 g/cm³ | 0.284 lb/in³ |
| Tensile Strength | 620 MPa | 89,900 psi |
| Yield Strength (0.2% offset) | 550 MPa | 79,800 psi |
| Fatigue Strength (unnotched) | 315 MPa | 45,700 psi |
| Elongation (50mm gauge) | 16% | 16% |
| Modulus of Elasticity | 190-210 GPa | 27,557-30,458 ksi |
| Brinell Hardness (annealed) | 156 HB | – |
| Vickers Hardness | 217 HV | – |
| Machinability | 70% (AISI 1212 = 100%) | – |
| Thermal Conductivity | 46.6 W/m·K | 323 BTU·in/hr·ft²·°F |
| Coefficient of Thermal Expansion (21-100°C) | 11.2 µm/m·°C | 6.22 µin/in·°F |
Ⅲ. Heat Treatment Specifications
- Annealing: Hold at 845-870°C followed by furnace cooling; hardness is about 156 HB, improving machinability.
- Quenching: Austenitize at 845-870°C then oil or water quench to obtain martensitic microstructure.
- Tempering: Select temperature between 200-650°C according to application requirements for tailored strength-toughness combinations:
- Low-temperature tempering (200-300°C): High hardness and strength, low toughness.
- Medium-temperature tempering (300-500°C): Optimal balanced strength and toughness.
- High-temperature tempering (500-650°C): High toughness with moderate strength.
- Forging: Initial forging temperature at approximately 1200°C, final forging temperature ≥850°C.
| Manufacturing Method | OEM 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 |
OEM 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 OEM Investment Casting 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/
