ASTM A519 AISI4140 Alloy Steel Tube Seamless for Mechanical

• Customization: Available
• Application: Chemical Industry, Construction Industry, Oil and Gas Industry, Water Treatment Plants
• Certification: CE, ISO9001
• End Connection: Plain End
• Length: Double Random Length (DRL), up to 20m
• Outer Diameter: 1/2 inch
• Wall Thickness: Schedule 80
• Type: Seamless
• Technique: Cold Drawn
• Material: Alloy Steel
• Surface Treatment: Black
• Usage: Machinery Industry
• Section Shape: Round
• After-Sales Service: Change/Return
• Warranty: 1 Year
• W.T: on Request
• Surface: Rt or Black on Request
• Transport Package: Bundles/Wooden Case/Custom
• Specification: 6-323.9mm
• Trademark: KM/OEM
• Origin: China
• Production Capacity: 1000 Ton/Year

Product Description

ASTM A519 AISI4140 Alloy Steel Tube Seamless For Mechanical 

Production Introduction
ASTM A519 covers several grades of carbon and alloy steel seamless mechanical tubing. It is manufactured by hot working and then cold finishing the steel into round, square, rectangle or special shapes. AISI 4140 is a steel formula designation indicating medium carbon content with strengthening alloys that include chromium, manganese, silicon, molybdenum, sulfur and phosphorus.
mechanical tubing in sizes up to and including 12 - 3/4 in. (323.8 mm) outside diameter for round tubes with wall thicknesses as required. The tubes shall be furnished in the following shapes, as specified by the purchaser: round, square, rectangular, and special sections.
Typical Tensile Properties, Hardness and Thermal Condition of A519 4140

Condition	HR	SR	A	N
Ultimate Strength, ksi[Mpa]	120[855]	120[855]	80[552]	120[855]
Yield  Strength, ksi[Mpa]	90[621]	100[689]	60[414]	90[621]
Elongation in  2 in. or 50 mm,%	15	10	25	20
Rockwell Hardness B Scale	100	100	85	100

HR = Hot Rolled, SR = Stress Relieved, A = Annealed, N = Normalized
Ordering Information
Condition: The purchaser shall specify a sizing method and if required, a thermal treatment.
Sizing Methods:
HF-Hot Finished,
CW-Cold worked,
RT-Rough Turned,
G- Ground.
Thermal Treatments:
A-Annealed,
N- Normalized,
QT-Quenched and Tempered,
SR-Stress Relieved or Finished Anneal.

Company Profile
From 1989 to now, Kingmetal Steel focus on manufacturing and distributing pipeline products including piping, fitting, flange, valve and fastener in stainless, carbon, alloy and duplex steel.
Kingmetal has a factory to manufacture seamless stainless steel pipe from DN6 to DN600 and distribute seamless steel pipe and fitting from top brand manufacturers such as Baosteel, Hengsteel, Tiansteel and Pansteel etc.
All of products are strictly compliance with standard, 100% inspection passed including visual, dimension and PMI test before shipment.
Both our sales and logistic teams are over 10 years of experiences and training frequently.
After- sales service with high efficiency, if any products are short quantity/weight or damaged caused by manufacturing, design or transportation can be compensated.
Why choose us?
One-Stop Solution
We have thousands of total production experience, from raw materials to finished products.
Competitive Price
Large scale purchase, standardized production process and efficient management make our price competitive.
Quick Shipping
Years of export experience enable us to control the transportation time more accurately.
Quality Control
The standardized production process, comprehensive management system, professional testing equipment
Special material customization
We support the customization of various complex materials
OEM/ODM
We support any form of OEM/ODM customization requirements.