Brian Fasteners is a reliable supplier of AISI 4145 Alloy Steel Bars in Houston, USA. High-strength alloy steels specialists, we deliver 4145 bars designed for heavy-duty use in oil & gas, aerospace, and power generation. Precision-engineered, our bars meet tight mechanical and metallurgical specifications. Backed by decades of experience, we guarantee quick lead times, heavy-duty packaging, and uniform quality in every batch. Select Brian Fasteners for alloy bars that offer performance, reliability, and value.
AISI 4145 has 0.43–0.48% carbon, 0.75–1.0% manganese, 0.8–1.1% chromium, and 0.15–0.25% molybdenum. It provides high tensile strength (usually 825–1080 MPa), good toughness, and good hardenability. Yield strength is 585–835 MPa. The steel is suitable for high–stress conditions and is usually supplied in a quenched and tempered condition. Its alloy composition improves its wear resistance, and it is used for large cross-section parts. While a bit less machinable than 4140, its superior mechanical properties make it the best choice for severe-load applications.
| Dimensions: | ASTM, ASME, DIN, BS, EN, IS, AMS, JIS, IBR & Other International Standards. |
|---|---|
| Standard: | ASTM A689, JIS G4801, DIN 17221, GB/T 18254, ASTM A295, JIS G4805, etc. |
| Alloy Steel AISI 4145 Round Bars Range: | Range – 3.17mm to 350mm dia |
| Alloy Steel AISI 4145 Round Bars Diameter: | 5mm-500mm (Customized size is acceptable) |
| Alloy Steel AISI 4145 Round Bars Length: | 1m-9m or according to the customer’s requirement |
| Type: | Round bar, rod, square bar, flat bar, hexagon bar, angle bar, channel bar, threaded bar |
| Alloy Steel AISI 4145 Round Bars Technique: | Forged/Hot Rolled/Cold Drawn/Peeled |
| Alloy Steel AISI 4145 Round Bars Surface: | bright round bar, pickled round bar, black round bar |
| Package Details: | Standard seaworthy package(wooden boxes package,pvc package, or other package) |
| Export Area: | USA, UAE, Europe, Asia, Middle East, Africa, South America |
| Grade | AISI 4145 | |
|---|---|---|
| Min. | Max | |
| C | 0.43 | 0.49 |
| Cr | 0.80 | 1.10 |
| Si | 0.15 | 0.35 |
| S | – | 0.040 |
| Mn | 0.85 | 1.10 |
| P | – | 0.035 |
| Mo | 0.15 | 0.25 |
| Grade: | AISI 4145 |
|---|---|
| Tensile Strength (ksi) min : | 140 |
| Elongation (% in 50mm) min: | 14 |
| Yield Strength 0.2% Proof (ksi) min: | 120 |
| Hardness: | – |
AISI 4145 Bars and Rods offer high strength, toughness, and wear resistance, making them ideal for heavy-duty applications.
Yes, they can be heat treated to enhance hardness, strength, and overall performance.
These bars and rods are commonly used in the automotive, oil and gas, and heavy machinery industries for parts like gears, shafts, and axles.
| Standard: | AISI 4145 |
|---|---|
| WERKSTOFF NR. | – |
| UNS | G41450 |
4145 Bars are applied in drilling tools, tool joints, subs, crossovers, and other oil & gas equipment components. Due to their high tensile strength and impact toughness, they are applicable in heavy-duty mechanical parts and downhole tools. They are also utilized in forging dies, power transmission parts, and structural mining and energy supports. The steel‘s high torque and pressure endurance capabilities make it a necessity in tough conditions. 4145 alloy guarantees operation under harsh operating conditions where failure cannot be tolerated.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
George Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Houston, USA
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