A519 AISI 4140 En19 Scm440 42CrMo4 Alloy Steel Mechanical Tubing

• After-sales Service: Change/Return
• Warranty: 1 Year
• Type: Seamless
• Technique: Cold Drawn
• Material: Alloy Steel
• Surface Treatment: Black
• Usage: Hydraulic/Automobile Pipe, Machinery Industry
• Section Shape: Round
• W.T: on Request
• Length: up to 20m
• 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

A519 AISI 4140 EN19 SCM440 42CrMo4 Alloy Steel Mechanical Tubing 

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.