Operating from the vibrant industrial heart of Kinshasa, Yoane Steel stands as a dedicated partner for businesses across Congo and beyond, specializing in robust and reliable materials. We are proud suppliers of Alloy Steel AISI 4140 bars, a versatile and high-strength grade chosen for its exceptional performance in demanding environments. Our commitment is to provide not just metal, but dependable solutions that form the backbone of your most critical projects, ensuring you have access to premium materials backed by local expertise and a focus on quality.
The strength of AISI 4140 stems from its balanced composition, primarily chromium and molybdenum, which gives it a remarkable combination of toughness and wear resistance. After proper heat treatment, these bars achieve impressive mechanical properties, including very high tensile strength and good ductility. This means they can handle significant stress and heavy loads without fracturing, making them a fundamentally sturdy choice for components that must withstand constant pressure and fatigue in challenging conditions.
Diameter :Â 8mm-3000mm
Length :Â 3,000-10,000mm
Finish :Â Bright, Polish & Black
Condition :Â Cold Drawn & Polished Cold Drawn, Centreless Ground & Polished
Form :Â Round, Square, Hex (A/F), Rectangle, Wire (Coil Form), Wire-mesh, Billet, Ingot, Forging Etc.
| Grade | C | Cr | Si | S | Mn | P | Mo | |
| AISI 4140 | min. | 0.38 | 0.8 | 0.15 | – | 0.75 | – | 0.15 |
| max. | 0.43 | 1.10 | 0.35 | 0.04 | 1.00 | 0.04 | 0.25 | |
| Grade | Tensile Strength (ksi) min | Elongation (% in 50mm) min | Yield Strength 0.2% Proof (ksi) min | Hardness |
| AISI 4140 | 855 | 20 | 621 | 197 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
| STANDARD | UNS | WERKSTOFF NR. |
| AISI 4140 | G41400 | 1.7225 |
You’ll find AISI 4140 bars hard at work in the gears, shafts, and spindles of heavy machinery, where their toughness is essential. They are also the material of choice for constructing high-strength bolts, connecting rods, and a wide array of automotive and oilfield components. Essentially, any application that demands a metal capable of enduring high stress, repeated impact, and significant wear is an ideal job for 4140, making it a fundamental building block for industries from manufacturing and construction to energy and transportation.
Yoane Steel is a leading manufacturer, supplier and exporter of high-quality Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel products. Our extensive product range includes Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates, catering to various industries in Kinshasa, Congo.
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