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Overview

Basic Info.

Model NO.	25CrMo4
Technique	Hot Forging
Special Use	High-Strength Steel Bars
Product Name	20crmnti Case-Hardening Gear Steel Bars
Wire Material	5-25mm
Rod Material	13-270mm
Condition	New
Product Features	Stable,Ultra-High Steel Purity,Controllable Harden
Transport Package	Strap Packaging, Wooden Cases, etc
Specification	customized
Origin	Hebei

Product Description

Product Description20CrMnTi Case-Hardening Gear Steel Bars

This product is a benchmark core offering within HBIS Shisteel's gear steel portfolio. It is manufactured in strict compliance with mainstream international standards as marked in the table, including GB/T 5216, JIS G4052, SAE, and EN standards. Exclusive technical specifications can be customized according to customer requirements. Standard supply specifications cover the full range of diameters from Ø13 mm to 260 mm as indicated in the table, and various delivery conditions such as hot-rolled, annealed, and normalized are available. Specifically developed for high-end transmission gear components, it serves as the primary supporting material for domestic automotive transmissions, construction machinery transmission systems, and motorcycle core gear parts. It is widely applied in industries such as machinery, automotive, motorcycle, and construction equipment as marked in the table, and serves as a fully qualified substitute for imported steel of the same type.

Core Product Properties
Excellent Carburizing and Heat Treatment Performance:
As a low-carbon alloy case-hardening steel, it exhibits exceptional adaptability to carburizing processes. The carburized layer is uniform and well-developed with a gradual carbon concentration gradient at the surface. After quenching, it achieves high surface hardness and strong core toughness, perfectly adapting to various continuous and batch-type carburizing furnace heat treatment processes while meeting the dual core requirements of wear resistance and impact resistance for gear components.

Stable and Controllable Hardenability:
Utilizing precise control technology for chemical composition within a narrow range, the hardenability bandwidth is consistently maintained within the optimal range specified by national standards. Performance variation within the same batch and heat number is minimal, ensuring uniform and controllable distortion of gears after heat treatment, significantly reducing scrap rates in customer machining and heat treatment processes.

Ultra-High Steel Purity and Extended Fatigue Life:
Employing advanced refining processes, the oxygen content and harmful non-metallic inclusion levels in the steel significantly exceed national standard requirements. This effectively prevents premature fatigue failure of gear components during service, greatly enhancing contact fatigue life and bending fatigue strength, making it perfectly suitable for demanding operating conditions involving high loads and high rotational speeds.

Excellent Hot and Cold Workability:
It exhibits excellent hot forging plasticity with a wide forging temperature range, making it resistant to forging cracks. The as-delivered microstructure is uniform and stable with a narrow hardness fluctuation range, making it well-suited for automated processing equipment such as high-speed CNC lathes and gear hobbing machines. It offers high cutting efficiency and low tool wear, meeting customer requirements for high-volume, high-precision machining.Main Products

Company Profile

Urich Supply Chain Ltd serves as an industrial application provider to various heavy industries that require high-quality special steel products - automotive, ship vessel building, industry machining and equipment/tooling, and so on. We work very closely with a top-tier state-owned manufacturer in China and fill in the gap of what they have less focus on - understanding and tailoring to our customers. Our target customers ranged from top-class branded automakers to small and medium-sized regional distributors. Our manufacturer is one of the few that meet strict carbon emission targets, which are mandatory in Europe and other markets. "Green Steel" advantage + very competitive price + industrial understanding enable us reliable supplier to you. We are looking forward to building business together.Foshan URich Supply Chain Management Co., Ltd. operates as an agile, client-focused industrial sourcing specialist and high-quality special steel provider. We bridge a critical gap in the international steel trade: while China's top-tier, state-owned steel giants deliver world-class metallurgy, their rigid mass-production workflows and massive minimum order requirements often leave mid-sized global manufacturers underserved.That is where URich delivers value. Backed by strong relationships with leading state mills, we specialize in understanding your unique machinery working conditions and breaking down rigid mill barriers. We offer custom-tailored cross-sections, optimized chemical bands, and premium "Green Steel" low-carbon options—all delivered with highly flexible, low MOQs starting at just 1 tons.By choosing URich, you receive the premium quality and mill-certified testing (MTC) of China's top steel manufacturers, combined with the personalized, responsive, and reliable 24/7 customer service of an independent partner. We handle the complexity of mill logistics and strict quality inspections, so you can focus on your business success.

FAQ1. Are you manufacturer?
Short answer: no we are not. But we do things that manufacturer won't do best - tailor to customer needs. We work very close with top tier major factory in China and in particular Hebei Shi-steel, a state owned manufacturer who has 60 years of industrial experience with 2.5 millions tons of capacity, also major supplier of Toyota automotive. When you deal with us you literally dealing with these top tier factories, enjoying their scaled cost structure, heavily invested technology and capability, while at the same time having highly customerized experience.2. Describe your target customer groupOur target customer ranged from top class branded automaker to small and middle size regional distributors. While smaller customer look into our competitive price and profitable special steel product, bigger customer appreciate our factory scales, certification and authority in the industry. We also work with a lot of individual broker or local trader who has strong relationship with end client or highly attached to the projects. We respect non-disclosure agreement (NDA) by heart and is flexible with situations.
3. Why should I trust you?While you are seeing us here in Made-in-China.com, it already means that we are verified and tested by their uncompromising verification process. Second, when are you dealing with us you are actually dealing with the giant state owned factories that is very stable in finance capacity. Our supply chain is simple and easy to understand.