Project Description
AISI SAE 4330V Forged Q+T Boring/Drill Alloy Steel Hollow Bar
Introduce
We are Chinese professional manufacturer of forged QT boring steel bar for oil services. We can supply multiple AISI/SAE standard alloy steel materials and forged bar diameter 80-500mm, boring hole diameter 10-250mm, max boring length 14 meters.
Product advantage
Boring one side: no step in the boring bar
High-tech Boring Equipment: Good Straightness and Roughness, Tiny Tolerance and Roundness
Stable mechanical property in materials after QT process
Chemical component according to America standard 100%
Ensure UT and drift test for each pieces
Company advantage
We have decades of produce experience in QT/Boring process and strict quality management system(ISO NQA 9001)
We cooperated with several middle-east oil gas companies for many times and have API certificates.
Our sales team are professional steel industry staff and exporter with fluent English.
We accept variety convenient payment ways and the third parties inspection organization.
Specification
| Product Name | Forged QT Boring Alloy Steel Bar For Oil Services |
| Specification | API 5CT/5CP/6A |
| Steel Grade | 4130, 4140, 4145, 4145H, 4330V, 4137, 4340 |
| Process | Hot Forged+QT+Boring |
| Forged Bar Diameter | 8-500mm |
| Boring Hole Diameter | 10-250mm |
| Length | Max14 meters |
| Inspection | Size, Chemical, Mechanical, UT, Drift Test, Low/High Temp. Impact |
| Certificate | MTC, CO/FE/FA, BV/SGS |
| MOQ | 1-5 tons |
| Delivery Time | 10-30 days |
| Trade Item | FOB CIF CFR PPU PPD |
| Packaging | Loose/Bundle/Wooden Pallet/Wooden Box/Plastic Cloth Wraps /Plastic End Caps/Beveled Protector |
Introduce
AISI 4330V MOD is a modification of the 4330 alloy steel grade, with hardenability and other characteristics improved by the addition of vanadium. Alloy Steel 4330V offers good formability which is used for those that require a good combination of strength and impact resistance.
Applications
Shock loading or stress concentration applications are suited to this steel specification. 4330V is widely used in the oil and gas industry for applications such as oil tools, drill jars and shoes, tool holders and reamers and in the aerospace industry for applications such as bolting and air frames.
Standards
AMS 6427, AMS 6359, AMS 6304, ASTM A646, API 7 Specification
Chemicals Composition
| Grade | C | Mn max | Si max | Cr | Mo | Ni | P max | S max | V |
| 4330V | 0.2-0.30 | 1.0 | 0.80 | 0.40-0.60 | 0.30-0.50 | 1-1.5 | 0.025 | 0.010 | 0.05-0.10 |
Mechanical Properties
| Yield strength Rp0.2,
MPa |
Tensile strength Rm,
MPa |
Elongation [%] | Hardness [HBW] | Impact, Charpy-V, -20ºC [J] |
| 1034 | 1138 | 15 | 341-388 | 32 |
Heat Treatment
Heat treatment temperatures, including rate of heating, cooling and soaking times will vary due to factors such as the shape and size of each steel component. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities.
Annealing
Heat the steel slowly to 820-860°C and allow enough time for the steel to be thoroughly heated. Cool slowly in the furnace to 580°C followed by air cooling.
Stress Relieving
When parts are heavily machined, ground or otherwise subject to cold work, stress relieving will be beneficial prior to hardening.
Hardening
4330V steel is usually supplied ready heat treated to 35-39 HRc. If further heat treatment is required annealed 4330V should be heated slowly to 840-875°C and after adequate soaking at this temperature quench in oil. Temper as soon as the tools reach room temperature.
Tempering
Heat carefully to a suitable temperature selected by reference to a tempering chart or table, soak at the temperature for 2 hours per 25mm of ruling section, then allow to cool in air.
Forging
Preheat the steel carefully, then raise the temperature to 1070-1230°C for forging. Do not forge below 850°C. 4330V has good forging characteristics but care must be taken when cooling the steel due to its susceptibility to cracking. Cooling in ash or lime after forging is recommended.
Machining
Normalize and Temper at 1250°F(677°C) maximum prior to rough machine. This steel may also be machined at maximum strength, but machining must then be followed with a stress relieving at approximately 400°F(204°C).
Weldability
The steel has good welding characteristics and can be welded by resistance flash welding.
Mill′s test certificate
EN 10204/3.1 with all relevant data reg. chem. composition, mech. properties and results of testing.
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:
- Oil and Gas Pipeline Construction
- Onshore and Offshore
- Boiler Manufacturers
- Oil Refining Equipment
- Petroleum and Chemical Plant Construction
- Fire Protection
- Heating & Air Conditioning
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.
