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CrMnTi Carburizing Steel Coil for Gear Rings
CrMnTi alloy steel coil is a carburizing alloy steel designed for manufacturing gear rings and mechanical transmission components. After carburizing treatment, it develops a high-hardness wear-resistant surface while maintaining a tough core structure. The material is widely used in automotive transmissions, industrial gear systems, reducers, and heavy machinery components requiring excellent fatigue resistance and dimensional stability.
What Is Alloy Steel Coil？
Product Definition：
Alloy steel coil is a flat-rolled steel product manufactured by hot rolling alloy steel slabs into continuous coils. The steel contains one or more alloying elements – primarily chromium (Cr), molybdenum (Mo), manganese (Mn), titanium (Ti), and vanadium (V) – which enhance mechanical properties including strength, hardness, toughness, and heat treatability. Alloy steel coils are the preferred raw material for high-strength stamped parts, gears, shafts, and structural components in machinery, automotive, and heavy equipment industries.
Why Choose Alloy Steel Over Carbon Steel？
| Factor | Alloy Steel Coil | Carbon Steel Coil |
|---|---|---|
| Strength | Higher (yield up to 930+ MPa) | Moderate (yield up to 355 MPa) |
| Hardness | Higher (up to 300+ HB) | Lower (120–180 HB) |
| Hardenability | Excellent (responsive to QT) | Limited |
| Wear Resistance | Excellent | Poor |
| Heat Treatment | Responsive | Limited |
| Cost | Higher | Lower |
Key Characteristics：
| Feature | Description |
|---|---|
| High Strength | Tensile strength from 800–1100+ MPa depending on grade and heat treatment |
| Excellent Hardenability | Alloying elements (Cr, Mo, Mn) improve response to quenching and tempering |
| Good Wear Resistance | Chromium enhances surface hardness and abrasion resistance |
| Heat Treatable | Suitable for quenching, tempering, carburizing, and induction hardening |
| Formability | Hot rolled condition allows stamping, bending, and forming |
| 100% Recyclable | Environmentally friendly with no loss of properties |
Typical Applications by Industry：
| Industry | Applications | Recommended Grades |
|---|---|---|
| Machinery Manufacturing | Gears, shafts, spindles, machine tool parts, rollers | 40Cr, 35CrMo, 42CrMo |
| Automotive | Transmission gears, axle shafts, steering components, suspension parts | 42CrMo, 20CrMnTi, 40Cr |
| Gear Manufacturing | Transmission gears, differential gears, pinion shafts, gear rings | 20CrMnTi, 40Cr |
| Construction & Heavy Equipment | Excavator components, structural parts, crane components | 35CrMo, 42CrMo |
| Fastener Manufacturing | High-strength bolts, studs, nuts | 35CrMo, 42CrMo |
| Power Generation | Turbine components, boiler parts | 15CrMo, 12Cr1MoV |
Each batch includes EN 10204 3.1 mill test certificate with full chemical and mechanical data. Third-party inspection (SGS, BV, TÜV) supported. MOQ: 23 tons, trial orders negotiable.
Key Specifications – Alloy Steel Coil
| Parameter | Specification / Range | Remarks |
|---|---|---|
| Standards | GB/T 37601-2019, GB/T 11251, ASTM A1031, JIS | Others on request |
| Cr-Mo Series (High Strength) | 35CrMo, 42CrMo, 40Cr | Excellent strength and toughness |
| Cr-Mn-Ti Series (Carburizing) | 20CrMnTi, 15CrMnTi | Gear steel, excellent surface hardness |
| Cr-Mo Heat Resistant | 15CrMo, 12Cr1MoV | High-temperature applications |
| Thickness | 1.5 mm – 25.4 mm | Per GB/T 37601-2019 |
| Width | 600 mm – 2000 mm | Custom slitting available |
| Coil ID (Inner Diameter) | 508 mm (standard), 610 mm (optional) | |
| Coil Weight | 3 – 25 tons per coil | Standard: 5–25 tons |
| Delivery Condition | Hot rolled, normalized, annealed, or quenched & tempered | Per customer requirement |
| Surface | Black (mill scale), pickled & oiled | See Screen 8 |
| Density | 7.85 g/cm³ | |
| Testing | Chemical analysis (OES), tensile, hardness (HB), impact (Charpy), UT (optional) | Mill cert EN 10204 3.1 |
| Packaging | Waterproof paper + steel straps + wooden pallet | Seaworthy, ISPM 15 |
Wuxi Yansheng Technology Co., Ltd. – Company Profile
Wuxi Yansheng Technology Co., Ltd. is a comprehensive technology enterprise specializing in high-quality metal raw material supply and precision processing services. Located in Wuxi City, a major steel distribution center in China, the company leverages the mature industrial chain advantages of the Yangtze River Delta region to provide professional material solutions to global customers.
As a technology-driven enterprise, Yansheng Tech maintains strategic cooperation with several well-known steel mills (such as TISCO, Baosteel, JISCO, Dongfang Special Steel, etc.) and is an authorized distributor of these mills. Our main products include stainless steel (304/316/BA/EP pipe), carbon steel, silicon steel, copper, aluminum and other materials in the form of sheets, pipes, coils, as well as custom-processed parts.
Core Business Highlights:
Material Supply: We maintain sufficient stock inventory, offering 304/316 stainless steel sheets, pipes, coils, API 5L casing, electrical steel, and more. We also accept orders for special steel grades and non-standard specifications.
Precision Processing: Equipped with imported mirror polishing machines, water jet cutting machines, high-precision slitting/leveling lines, large CNC milling machines, boring machines, and more. We provide customized services including BA/EP pipe finishing, medium plate polishing, matte finishing, embossing, plasma cutting, etc.
Main Applications: Our products are widely used in industries such as solar energy, pressure vessels, boilers, electric heating equipment, petrochemicals, environmental protection machinery, pharmaceutical and food processing, and new energy vehicles.
Our processing center is located in Xishan District, Wuxi City, covering nearly 10,000 square meters, with an experienced technical and service team. We adhere to the business philosophy of "Technology First, Quality Oriented, Service Supreme" , providing 24/7 warehousing and logistics support as well as comprehensive after-sales service. Yansheng Tech is committed to being your trusted long-term partner.
Frequently Asked Questions (FAQ)
Q1. What products do you mainly supply?
We mainly supply stainless steel (304/316/BA/EP pipes), carbon steel, silicon steel, copper, aluminum, and other materials in sheets, pipes, and coils. Customized processing services are also available.
Q2. Do you have stock available?
Yes, we maintain sufficient stock for most standard specifications. For non-standard sizes, we can accept orders with reasonable lead time.
Q3. Can you provide MTC (Mill Test Certificate)?
Yes, we provide MTC for every shipment. Third-party inspection (SGS, TÜV, BV, etc.) is also available upon request.
Q4. Do you support video inspection before shipment?
Yes, we fully support video inspection. You can also arrange an agent or third party to visit our factory for on-site inspection before shipment.
Q5. What are your main export markets?
We export to Southeast Asia, the Middle East, Europe, Africa, and South America. We have rich experience in international trade and export documentation.
Q6. What payment terms do you accept?
We accept T/T (wire transfer), L/C at sight (irrevocable), and sometimes a combination of T/T deposit + L/C balance. Payment terms are negotiable based on order size and customer history.
Q7. Can you provide samples?
Yes, samples are available for most standard products. For custom sizes, we may need to produce small batch samples. Sample cost and shipping are usually borne by the customer, but can be discussed.
Q8. What is your typical lead time?
For stock items: 7–10 days after order confirmation. For custom production: 20–30 days, depending on the specification and quantity.
Q9. What quality certifications do you have?
We provide MTC with every shipment. Our partner mills are ISO9001 certified. We can also assist with third-party inspections (SGS, TÜV, BV) upon request.
Q10. How can I get a quotation?
Please send us your material grade, specification (size, thickness, length), quantity, and preferred trade term (FOB, CIF, DAP, etc.). We will reply with a detailed quotation within 24 hours.
Send Inquiry to This Supplier
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