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Home > Mechanical Mods > AISI SAE 4140 Forged Q+T Boring/Drill Alloy Steel Hollow Bar
AISI SAE 4140 Forged Q+T Boring/Drill Alloy Steel Hollow Bar
AISI SAE 4140 Forged Q+T Boring/Drill Alloy Steel Hollow Bar
AISI SAE 4140 Forged Q+T Boring/Drill Alloy Steel Hollow Bar
AISI SAE 4140 Forged Q+T Boring/Drill Alloy Steel Hollow Bar
AISI SAE 4140 Forged Q+T Boring/Drill Alloy Steel Hollow Bar
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AISI SAE 4140 Forged Q+T Boring/Drill Alloy Steel Hollow Bar
AISI SAE 4140 Forged Q+T Boring/Drill Alloy Steel Hollow Bar
AISI SAE 4140 Forged Q+T Boring/Drill Alloy Steel Hollow Bar
AISI SAE 4140 Forged Q+T Boring/Drill Alloy Steel Hollow Bar
AISI SAE 4140 Forged Q+T Boring/Drill Alloy Steel Hollow Bar

AISI SAE 4140 Forged Q+T Boring/Drill Alloy Steel Hollow Bar

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Product Description

Basic Information
Model NO.
4140
Type
Seamless
Technique
Rolled or Forged
Material
Alloy Steel
Surface Treatment
Black/Peeled/Polished
Usage
Oil/Gas Drilling
Section Shape
Round
Specification
OD 30-850mm
Origin
China
Production Capacity
100000 Tons Per Year
Product Introduction

AISI SAE 4140 Forged Q+T Boring/Drill Alloy Steel Hollow Bar. As a professional manufacturer of forged QT boring steel bar for oil services, we supply multiple AISI/SAE standard alloy steel materials. Our capabilities include forged bar diameters from 80-500mm, boring hole diameters from 10-250mm, and a maximum boring length of 14 meters.

Product Advantages
🎯
Boring Precision: Boring one side ensures no step in the boring bar.
🛠️
High-tech Equipment: Advanced boring technology provides excellent straightness, roughness, tiny tolerance, and roundness.
💎
Material Stability: Stable mechanical properties are guaranteed in materials following the QT process.
📜
Standard Compliance: Chemical components are 100% according to American standards.
🔍
Quality Testing: We ensure UT and drift testing for every piece produced.
Chemical Properties (Grade 4140)
Grade C Cr Mn Si Mo S P
4140 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%
Technical Specifications
Product NameForged QT Boring Alloy Steel Bar For Oil Services
StandardAPI 5CT / 5CP / 6A
Steel Grade4130, 4140, 4145, 4145H, 4330V, 4137, 4340
ProcessHot Forged + QT + Boring
Forged Bar Diameter8-500mm
Boring Hole Diameter10-250mm
Max Length14 Meters
InspectionSize, Chemical, Mechanical, UT, Drift Test, Low/High Temp. Impact
CertificateMTC, CO/FE/FA, BV/SGS
Trade TermsFOB, CIF, CFR, PPU, PPD
PackagingLoose/Bundle/Wooden Pallet/Wooden Box/Plastic Cloth Wraps/Plastic End Caps
Product Gallery
Alloy Steel Hollow Bar Process
Forged Boring Bar Inspection
QT Alloy Steel Bar
Hollow Bar Stock
Drill Alloy Steel Detail
Frequently Asked Questions
Q1: What are the size limitations for your boring services?
We can handle forged bar diameters from 80mm to 500mm, with boring hole diameters ranging from 10mm to 250mm. The maximum length we can bore is 14 meters.
Q2: What steel grades are available for these hollow bars?
We provide several grades including 4130, 4140, 4145, 4145H, 4330V, 4137, and 4340 alloy steel.
Q3: What quality control tests do you perform?
Every piece undergoes rigorous testing, including Size inspection, Chemical analysis, Mechanical property tests, UT (Ultrasonic Testing), Drift tests, and Low/High temperature impact tests.
Q4: What are the main applications of the 4140 hollow bar?
These bars are primarily used in oil and gas drilling services due to their high-strength forged and QT (Quenched and Tempered) properties.
Q5: Do you follow international manufacturing standards?
Yes, we adhere to API 5CT, API 5CP, and API 6A specifications, and our chemical components strictly follow American standards.
Q6: What is the typical delivery time and MOQ?
The typical delivery time is between 10 to 30 days. Our Minimum Order Quantity (MOQ) ranges from 1 to 5 tons depending on the specific requirements.

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