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Help CenterHigh-hardness Roll Steel 85cr3mo Round Steel, High-wear-resistant 85cr5mo Alloy Steel Bar, Non-standard Customization, Fast Delivery
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In the steel rolling industry, rolls are the core consumables. Facing harsh working conditions such as heavy load, high temperature, and alternating hot and cold, traditional steel grades often fail quickly due to insufficient hardness or poor wear resistance, resulting in frequent roll changes, which seriously affects the continuity of the production line and the quality of finished products. To solve this problem, Liaocheng Jincheng Yangming Special Steel Co., Ltd. relies on its profound technical accumulation in the field of special alloy steels and launches high-hardness roll steel 85Cr3Mo round steel and high-wear-resistant 85Cr5Mo alloy steel bars. By precisely controlling the content and ratio of elements such as carbon, chromium, and molybdenum, and combining with the optimized heat treatment process, the material can obtain excellent hardness while maintaining good toughness, effectively extending the service life of the rolls and reducing the comprehensive cost for customers.
Our 85Cr3Mo and 85Cr5Mo alloy steel bars are produced by the electric furnace smelting + refining + vacuum degassing process to ensure the purity of the steel. After forging or rolling, the structure with fine carbides ensures the responsiveness of subsequent heat treatment. Carbon provides the basic hardness, chromium significantly improves the hardenability and wear resistance, and molybdenum refines the grains, improves the tempering stability and fatigue resistance. Therefore, this series of round steel is particularly suitable for manufacturing cold-rolling work rolls, intermediate rolls, and various roll components with high requirements for wear resistance.
Main product features include:
- Excellent hardness retention: Under long-term high-load operation, the surface hardness decreases slowly, effectively reducing roll marks and surface roughening.
- Good contact fatigue resistance: Through reasonable alloy design and heat treatment, the generation of fatigue cracks is suppressed, and the service life is extended.
- Flexible non-standard customization: We can customize different diameters (such as Ф20mm-Ф500mm), lengths, end chamfers, center holes, etc. according to the drawings or working conditions provided by customers to meet the assembly requirements.
- Fast delivery: With the stocked raw material billets and an efficient production scheduling system, the cycle from order confirmation to shipment is short, helping customers reduce downtime.
Technical specifications (typical values):
| Grade | Carbon (C) % | Chromium (Cr) % | Molybdenum (Mo) % | Hardness (HRC) | Application scenarios |
| 85Cr3Mo | 0.82-0.88 | 2.80-3.20 | 0.15-0.25 | 58-63 | Cold rolling work rolls, backup rolls |
| 85Cr5Mo | 0.82-0.88 | 4.80-5.20 | 0.15-0.25 | 60-65 | High-load cold rolling rolls, wear-resistant parts |
* The above are typical ranges, and the actual values can be adjusted according to customer requirements. In addition, we can also make micro-alloying improvements as required, such as adding elements like vanadium and titanium to further refine the structure.
Company strength and quality control
Liaocheng Jincheng Yangming Special Steel Co., Ltd. is located in Liaocheng City, Shandong Province, with convenient transportation, enabling it to quickly cover the East China and Northern markets. The company has long been dedicated to the R & D and production of special steel, covering multiple fields such as precipitation-hardening steel, duplex steel, heat-resistant steel, heat-resistant alloys, austenitic steel, and martensitic steel. Its products are widely used in industries such as petroleum, chemical, shipbuilding, aerospace, mining, and construction machinery. We always adhere to the principles of seeking truth from facts and honesty, and have received high praise in the industry and from customers. For each batch of roll round steel, we implement strict internal control standards from raw material smelting to finished product inspection, and can provide composition inspection reports and hardness inspection reports to ensure product traceability.
We are well aware that the reliability of roll steel is directly related to the customer's production efficiency. Therefore, our technical team not only provides off - the - shelf products but is also willing to recommend the optimal material and heat treatment process solutions based on the customer's specific working conditions (such as rolling force, temperature, cooling conditions, etc.). In addition, our non - standard customization ability allows customers to incorporate unique assembly requirements into the design, thereby reducing subsequent processing steps and improving overall efficiency.
Frequently Asked Questions (FAQ)
1. What are the performance differences between 85Cr3Mo and 85Cr5Mo?
Answer: 85Cr3Mo contains about 3% chromium, has moderate hardness (HRC58 - 63), good toughness, and is suitable for conventional cold rolling rolls; 85Cr5Mo contains about 5% chromium, has higher hardness (HRC60 - 65), more prominent wear resistance, and is suitable for high - load, high - line - speed rolls. The cost of 85Cr5Mo is slightly higher. Customers can choose according to the working conditions and budget.
2. What is the delivery state of this round steel? Does it require secondary heat treatment?
Answer: The delivery state is usually annealed, which is convenient for machining. After the customer processes it into a roll blank, quenching + tempering are required to achieve the final hardness for use. We can provide recommended heat treatment process parameters (such as quenching temperature, tempering temperature and time), and assist in process tests if necessary.
3. What non-standard customization specifications are supported? What is the minimum order quantity?
Answer: We support diameters from 20mm to 500mm (larger specifications can be negotiated), and the length can be cut according to requirements. We can process end chamfers, center holes, surface turning, etc. The minimum order quantity depends on the specifications and complexity. We can undertake single pieces or small batches for regular products. Welcome to consult about your specific requirements.
4. Can the delivery time be expedited? How long does it usually take?
Answer: For urgent orders, we can arrange expedited production if raw materials and production schedules allow. For regular non-standard customized orders, the delivery time is generally 10 - 15 working days from the confirmation of the drawings and technical requirements. The specific time needs to be evaluated based on the order volume and technical difficulty. Please contact the sales department for confirmation.
5. How to ensure the consistency of hardness and composition in batches?
Answer: Spectral analysis is carried out for each furnace during the smelting process; after heat treatment, hardness testing (Rockwell) and metallographic structure inspection are carried out for each batch to ensure compliance with the customer's technical specifications. A test report will be provided with the finished products, and the customer can also entrust a third - party for testing.
6. Is this material suitable for hot - rolling rolls?
Answer: 85Cr3Mo/85Cr5Mo are mainly used for cold - rolling rolls, and the working temperature generally does not exceed 200℃. If used for hot - rolling rolls, the hardness and tempering resistance will decrease at high temperatures. If you need materials for hot - rolling rolls, we recommend heat - resistant alloy steel series (such as H13, 3Cr2W8V, etc.). You can consult our technical team for selection.
7. Do you provide material certificates and after - sales service?
Answer: Yes, we can provide product composition test reports, hardness reports and certificates of conformity with the goods. After - sales service includes usage guidance, process optimization suggestions, etc. If there are quality problems with the material itself, we will handle it as agreed.
By choosing Liaocheng Jincheng Yangming Special Steel Co., Ltd., you will not only get a high - quality roll steel, but also a trustworthy partner. We look forward to discussing and solving material problems in production with you. Welcome to contact us at any time by phone or online to get professional advice for your specific working conditions.
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