Project Description
AISI 4140 Hollow Bar
4140 hollow bar metric is normally used for heavy-duty industrial applications. Also referred to as Chromoly steel, 4140 round tube is known for strength, resistance to fracturing, abrasion, and impact in high-stress applications. We offers 4140 steel tube in a variety of diameters, wall thicknesses, and standard lengths. Price and order your 4140 tube online, and enjoy the convenience of direct-to-you delivery.
Advantages
Excellent strength-to-weight ratio
High tensile strength, ductility, and toughness
Lighter and more robust than carbon steel
Easy to weld, form, and machine
Ability to harden using heat-treating or work hardening
L80 and P110 heat treated mechanical.
Charpy V notch testing
SIZE RANGE
OD : 1.250” – 31.250”
OD Tolerance: +/- .005” (up to 1.500” OD), to +/- .010” (above 1.500” OD)
Wall thickness : 0.100”– 3.150”
Wall Tolerance: +/- 10% (For ID Over .500”) to +/- 15% (for ID under .500”)
17.000” – 24.000” random lengths (Cut to Length available)
Chemical Composition %
| C | Cr | Mn | Si | Mo | S | P |
| 0.38-0.43% | 0.80-1.10% | 0.75-1.0% | 0.15-0.30% | 0.15-0.25% | 0-0.040% | 0-0.035% |
MANUFACTURING PROCESS
Depending on the grade and type, alloy tubing is either produced per ASTM A519 or API 5CT industry standards. See CDS, HRS, or Boring manufacturing processes per the specific type and specification for more information.
1 CDS: seamless tube and pipe is produced by piercing hot billets and subsequent rolling which reduces their diameter and elongates them. This material is then passed through a die and over a mandrel plug to produce an accurate size and gauge which is the essence of the cold drawing process.
2 HRS: Hot rolled mechanical tubing is produced by heating a solid billet or bar and then rotary piercing it as it rotates on rollers. Then the final processing through multiple pass size-reducing mills occurs. Tolerances and finish are similar to other hot worked steel products. Range of sizes and grades are more restricted than cold finished by the nature of the process involved.
3 Forging + Boring/Drilling: Drilling is the process of removing material by using a drill bit. Drill bit is a long, sharp instrument, often with flutes, but it may have a variety of features depending on the work.
Heat conditions
| Condition | Grade | Medium |
| Annealed or normalized | 4140 | Air |
| Quenched and tempered | 4140 | Polymer or oil |
| AISI 4140 MECHANICAL TUBING | Heavy wall, seamless alloy tubing is available upon enquiry. | |
| Spec | L80/NACE MR-01-75 | P110 |
| Tensile Strength, psi | 95,000 | 110,000 / 140,000 |
| Yield Strength min, psi | 80,000 | 125,000 |
| Elongation (%) | 18 | – |
| Hardness | RC 16/22 | RC 28/36 |
| HBN 235 max | ||
| CVN (Ft-lbs min aim) | 15 | 30 |
| Test Temp (℉) | 50 | 50 |
Applications
Aerospace applications
Gas and oil equipment
Blast Joint
Order 4140 Hollow Bar Today
We stocks a wide range of 4140 hollow bar sizes for your specific project needs. We offer quick delivery. Contact us today to discuss using round 4140 hollow bar in your application.
We are committed to integrate steel resources in china and serve the global steel market. Our company has more than 15 years of experience in steel researching, production, managing and sales. And our team mostly are based on and worked in national famous steel enterprise before. In the aspect of resources and information, we have established cooperative relationship with nearly hundred enterprises, either state-owned or private owned in China.
What’s more, we have built long, deep and close business relationship with dozens of steel company, Sharing and holding equities with several steel enterprises. Because of the close cooperation with steel companies and our pioneering spirit, which can ensure us stay at the top competition, and ensure our customers get what they really want. We provide preffesional one-stop service to the Contractors of follows project:
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Our ability to purchase materials directly from leading mills at the best possible price will give you the competitive edge. This coupled with a skilled workforce dedicated to embracing the demands of the markets we serve. Just give us a call +86-731-89903933.
