Bars and Rod Forgings
- Forged round bars, square bars, flat bars and rectangular bars
- Rough machined or fully machined according to drawing
- Suitable for shafts, pistons, couplings and structural parts
Open Die Forging Capabilities for 36CrNiMo4 (1.6511)
Jiangsu Liangyi Co., Limited, established in 1997 and located in Jiangyin City, Jiangsu Province, manufactures custom 36CrNiMo4 (1.6511) forging parts for heavy industry. Our Factory covers an area of 80,000㎡ and has an annual capacity of 120,000 tons. We can make forged parts all in-house, including steel sourcing, open die forging, seamless rolled ring production, heat treatment, machining and final inspection according to customers' drawings and technical manuals.
36CrNiMo4 (1.6511) is a heat-treatable Cr-Ni-Mo alloy steel widely used for parts requiring high toughness, high strength and good fatigue resistance after quenching and tempering.
25+Years of experience
80,000㎡Factory area
120,000TAnnual capacity
50+Export countries
36CrNiMo4 (1.6511) Forged Product Range
Rolled Rings and Hollow Forgings
- Seamless rolled rings, gear rings, sleeves, hubs and hollow bars
- Maximum rolled ring diameter up to 5000 mm
- Used for gear systems, bearings, kilns and offshore equipment
Shaft and Gear Forgings
- Gear shafts, pinion shafts, crankshafts, spindles and eccentric shafts
- Forgings for reducers, mills, crushers and energy equipment
- Available with heat treatment and machining support
Other Custom Forgings
- Discs, blocks, plates, flanges, cylinders, pipe sections and sleeves
- Custom geometry based on customers' drawings
- Sample to mass production, minimum order can start from 1 piece
Industry Uses of 36CrNiMo4 (1.6511) Forgings
Wind and Hydropower
Forged shafts, ring gears and transmission parts for wind turbine gearboxes and hydro turbine systems where fatigue strength and toughness are critical.
Mining and Construction
Eccentric shafts, spindles, slewing bearing races and heavy-duty transmission parts for crushers, excavators and large construction machinery.
Cement and Building Materials
Pinion shafts, riding rings, torque rods and trunnion-related forgings for cement rotary kilns, mills and dryers.
Oil and Gas
Mud pump parts, box riser joints, gearbox shafts and winch-related parts for high-pressure and offshore service environments.
Sugar and General Industry
Roller shafts, pinion shafts, gear blanks and forged transmission parts used in sugar mill lines, pumps, reducers and compressors.
Custom Spare Parts
Custom forged parts for replacement projects where size stability, material certification and traceable inspection records are required.
Material Specifications and Technical Data
36CrNiMo4 (1.6511) is a widely used European alloy steel grade often compared with AISI 4340. After proper quenching and tempering, it offers a strong balance of tensile strength, impact resistance and fatigue performance for power transmission and heavy-load equipment.
Main Standards
- EN 10250-3: Open steel die forgings for general engineering purposes
- EN 10297-1: Seamless circular steel tubes for mechanical and engineering purposes
- Customer-specific EN, DIN, ASTM or drawing-based inspection requirements
Chemical Composition
| Element | Min (%) | Max (%) |
|---|---|---|
| C | 0.32 | 0.40 |
| Si | - | 0.40 |
| Mn | 0.50 | 0.80 |
| P | - | 0.035 |
| S | - | 0.035 |
| Cr | 0.90 | 1.20 |
| Ni | 0.90 | 1.20 |
| Mo | 0.15 | 0.30 |
Mechanical Properties in Quenched and Tempered Condition
| Property | Value |
|---|---|
| Yield Strength (Rp0.2) | ≥ 1050 N/mm² |
| Tensile Strength | 1250 - 1450 N/mm² |
| Elongation (A5) | ≥ 9% |
| Reduction of Area | ≥ 40% |
| Impact Strength at +20°C | ≥ 27 J |
Heat Treatment Reference
- Austenitization: 840 °C for 2 hours
- Quenching medium: 60-80 °C oil
- Tempering: 200 °C for 2 hours followed by air cooling
- Supply condition: isothermal annealed or normalized and tempered, maximum hardness 250 HB
Quality Control and Inspection
Melting and Forging Requirements
- Steel can be produced by electric arc furnace or blast furnace plus converter route with ladle treatment
- Vacuum degassing is used to improve internal quality and reduce inclusions
- Recommended forging ratio: ≥ 5:1 for continuous casting and rolled bars, ≥ 3:1 for forged bars
Inspection and Certification
- Ultrasonic inspection according to EN 10228-3, subject to agreed acceptance level
- Non-metallic inclusion evaluation according to ISO 4967 Method A or ASTM E45A
- Grain size target G6 and finer, with material certification available for each shipment
- MTC EN 10204 3.1 or 3.2 can be supplied
Why Buyers Choose 36CrNiMo4 (1.6511) Forgings
High hardenability
Good fatigue resistance
Suitable for heavy loads
Stable after heat treatment
Custom drawing support
Export-ready documentation
For engineering procurement, this grade is often chosen when the use demands a tougher and stronger alloy steel forging for shafts, gears, rings and heavy rotating parts. It is particularly suitable where the combination of toughness, hardenability and size reliability matters more than simple material cost.
Frequently Asked Questions
What is 36CrNiMo4 (1.6511) equivalent to?
It is commonly compared with AISI 4340 and is widely used for high-strength, heat-treatable forged parts.
What size range can be produced?
The available production range is 30 kg to 30000 kg, with maximum rolled ring diameter of 5000 mm and maximum forged shaft length of 12000 mm.
Can you produce according to customer drawings?
Yes. Custom drawings, machining allowances, heat treatment requests and inspection plans can all be followed according to project requirements.
What documents can be supplied with shipment?
Main documents include material certificate, size inspection records and agreed non-destructive testing reports.
Do you accept small quantity orders?
Yes. Minimum order quantity can start from 1 piece for samples, spare parts or urgent replacement projects.
Contact Jiangsu Liangyi for Custom 36CrNiMo4 (1.6511) Forgings
If you need forged rings, shafts, bars or custom open die forgings in 36CrNiMo4 (1.6511), send your drawing, quantity, heat treatment requirement, testing standard and target delivery time. The sales team can reply with a suitable manufacturing proposal and quotation.
Phone / WhatsApp: +86-13585067993
Website: https://www.jnmtforgedparts.com/36crnimo4-16511-forging-parts.html
Address: Chengchang Industry Park, Jiangyin City, Jiangsu Province, China