Custom Forged Steel Disc Manufacturer | 826M40, 30CrNiMo8 Large Diameter Disc Supplier | HHF
- HHF
- HENAN
- 45DAYS
- 200pcs per month
HHF forges large diameter steel discs from 826M40 and 30CrNiMo8, OD 120mm to 1500mm, on a 10,000-ton press with in-house National Class II lab testing for heavy machinery and industrial use.
Custom Forged Steel Disc Manufacturer | 826M40, 30CrNiMo8 Large Diameter Disc Supplier | HHF
HHF produces large diameter forged steel discs with outer diameters from 120mm to 1500mm. Discs are made from 826M40 and 30CrNiMo8, forged on a 10,000-ton hydraulic press, and verified in our National Class II laboratory for chemical composition, mechanical properties, and hardness. Custom drawings are welcome, and our technologists can also develop drawings based on your application requirements.
Why Large Forged Discs Cause Problems, and How HHF Handles It
A forged disc looks simple on a drawing. A round section, a specified diameter, a hardness range. In practice, large discs are where a lot of forging problems hide. A disc with insufficient forging ratio can retain cast structure in the core, and no amount of later heat treatment fully removes it.Hardness at the surface may seem to meet specifications, but at the heart or twenty millimeters in, hardness can be way out. If the disk goes to a turbine, large bearing, or the flange of some heavy machinery these internal irregularities can result in failure or unplanned downtime.
We begin at the source of the steel. The discs are forged by means of the 10,000-ton hydraulic press where deformation is sufficient to break down segregation areas and consolidate the internal structure. Heat treatment is adjusted according to the section thickness rather than on a fixed cycle so hardness remains the same over the surface and through the center of the disc. Each batch is analyzed for chemical composition, mechanical properties, and hardness at our National Class II laboratory. If you still have questions you can request for sample reports inspection or invite you personally to view the lab. You know, we would never mind you to check.
Benefits of HHF Forged Steel Discs as Products
A few things you should know here. First, the diameter range is 120mm to 1,500mm. This range can meet industrial requirements to a great extent without cutting the disc into segments. Second, 826M40, as well as 30CrNiMo8, are hardenability grades, so very large sections can get uniformly mechanical properties even after quenching and tempering. Third, we do the testing ourselves. Chemical composition, mechanical properties, hardness and impact tests are done in the plant. Therefore, we don’t have to rely on outside reports in order to release the batch. Fourth, we may prepare the drawing for you if you are not able to draw or develop one. Our technologists look into application and produce a drawing that meets the functional requirements and not, you, adapting yourself to a standard size.
Custom Forged Disc Solutions
Disc requirements shift with the application. A turbine disc needs consistent properties across a large section. A bearing disc needs controlled hardness and dimensional accuracy. A flange or coupling disc needs flatness and machinability. Our engineering team reviews material selection, dimensions, and performance requirements with you, then recommends the grade and heat treatment condition that fits the actual service conditions. Materials beyond 826M40 and 30CrNiMo8 can be selected according to your requirement.
Chemical Composition of 826M40
| Grade | C | Si | Mn | P | S | Cr | Mo | Ni |
|---|---|---|---|---|---|---|---|---|
| 826M40 | 0.36-0.44 | ≤0.35 | 0.45-0.70 | ≤0.035 | ≤0.035 | 0.50-0.80 | 0.45-0.65 | 2.30-2.80 |
Mechanical Properties of 826M40
| Yield Strength Rp0.2 (MPa) | Tensile Strength Rm (MPa) | Elongation A (%) | Hardness (HBW) | Charpy Impact (J, 20°C) |
|---|---|---|---|---|
| ≥900 | ≥965 | ≥12 | 300-325 | ≥54 |
Chemical Composition of 30CrNiMo8
| Steel Name | Number | C | Si | Mn | P max | S max | Cr | Mo | Ni |
|---|---|---|---|---|---|---|---|---|---|
| 30CrNiMo8 | 1.6580 | 0.26-0.34 | ≤0.40 | 0.30-0.60 | 0.035 | 0.035 | 1.80-2.20 | 0.30-0.50 | 1.80-2.20 |
Mechanical Properties of 30CrNiMo8
| Yield Strength Rp0.2 (MPa) | Tensile Strength Rm (MPa) | Elongation A (%) | Reduction Area Z (%) | Hardness (HBW) | Impact (J, Room Temperature) |
|---|---|---|---|---|---|
| ≥950 | 1100-1250 | ≥12 | ≥35 | 300-360 | ≥30 |
Quality Control You Can Verify
Disc quality is not a claim, it is a set of measured results. Our National Class II laboratory performs tensile testing, low-temperature impact testing down to −80°C, chemical composition analysis, metallographic structure analysis, non-metallic inclusion analysis, gas content analysis, grain size analysis, and magnetic induction testing for non-magnetic steels. Every batch ships with inspection records. We hold API Q1, API 7-1, CSSC, ISO 9001:2008, and ISO/TS29001 certifications, and our products have been exported to more than 20 countries.
Warranty and After-Sales Service
We warranty all our HHF forged discs for one year from the date of delivery on manufacturing defects from material, forging and heat treatment. During the warranty period, issues that have been verified are dealt with through repairing, replacing or giving a credit in line with the contract terms. Technical inquiries are usually solved within a working day. Also, we can arrange a joint inspection for overseas customers who prefer an SGS or a BV presence. Each production and inspection file is maintained as a record of an order so, in order to make a repetition of an order, all that is needed is to find the original specification and no redesign is required.
Logistics and Delivery
Detailed planning for transportation must be prepared long before the shipment of the discs. The port mode of delivery includes the major Chinese seaports such as Shanghai, Ningbo, Tianjin, Qingdao and Guangzhou. Packing shall be done in line with the Incoterm agreement. The factory loading method allows the carrier's container to be loaded directly at our factory, which brings down the transport and packing costs and makes the loading process transparent to you. We can work under FOB, CIF and DAP terms, and we will be happy to assist your chosen forwarder with documentation, delivery date and unloading arrangements.
Payment Terms
Normally we require 30% prepayment before the commencement of the production and 70% balance payment prior to the delivery. If you are a long term customer or a repeat order, then the possibility of sight L/C or partial payment against the shipping documents could well be a topic for discussion. The company can accept both T/C and L/C.
About HHF
Henan Zhongyuan Heavy Forging Co., Ltd., also known as HHF, was established in November 2004 when the first factory was put into production in Jiyuan city, Henan Province. At present, it is a high-tech enterprise enjoying national support. A factory site area of about 150 mu is available besides three large open-die forging lines around a 10,000-ton hydraulic press, and two die forging lines, large computerized numerical control (CNC) machining centers, heat treatment lines, and a National Grade 2 metallurgy laboratory. The company annually produces over 50,000 tons of large forgings in single parts of which weight exceeds 30 tons.HHF specializes in petroleum equipment and large precision forgings, and is one of China's leading drilling tool stabilizer manufacturers. Products include magnetic and non-magnetic stabilizers, drill collars, petroleum and mining drill pipes, reamers, pump head bodies, industrial shafts for wheels, ships, turbines, and motors, and cast pipe molds. These are exported to the United States, the United Kingdom, France, Italy, Austria, Russia, the Middle East, South Africa, Brazil, Singapore, and more than 20 other countries and regions.
Frequently Asked Questions
How soon can I get a quotation?
Usually within 3 working days. We need your requirements and main dimensions.
How is quality controlled?
A dedicated QA team follows production from raw material receiving through shipping. Chemical composition, mechanical properties, and hardness are tested in our National Class II laboratory.
Can I visit your factory?
Yes. We will arrange for our technical team to meet you and go through requirements in person.
What is the production lead time?
Forging, rough machining, Q+T, final machining. Normally 45 days.
What are your payment terms?
30% down payment to start, 70% before delivery.
What materials are available for forged discs?
826M40 and 30CrNiMo8 are our standard grades. Other materials can be selected according to your requirement.
What is the maximum disc diameter you can forge?
Outer diameters range from 120mm to 1500mm. If your disc falls outside this range, send us the drawing and we will confirm feasibility.
Do you provide test reports with the discs?
Yes. Chemical composition, mechanical properties, hardness, and impact test reports ship with the goods.
Which ports do you ship from?
Shanghai, Ningbo, Tianjin, Qingdao, and Guangzhou. Factory loading is also available.
Ready to Start Your Forged Disc Project?
Send your drawing, material grade, dimension, and quantity through the inquiry form below. Our engineering team will review it and come back with a quotation within three working days. If the project is still early and you do not have everything ready, send what you have and we will help move it forward. Material selection, heat treatment condition, and inspection standards are all open for discussion before you lock the spec. Fill in the form at the bottom of this page, and we will tell you exactly what we can do and how we will verify it.
