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Carbon Seamless Steel Tubing ASTM A519 4130,4140 Hot Finished Or
Cold Finished Tubing OD 114.3mm
ASTM A519 specification covers for several grades of carbon and alloy steel
mechanical tubing, either hot-finished or cold-finished. The steel
used in the mechanical tubing may be cast in ingots or may be
strand cast. When steel of different grades is sequentially strand
cast, identification of the resultant transition material is
required. The seamless tubing is a tubular product made without a
welded seam. It is usually manufactured by hot working steel, and
if necessary, by subsequently cold finishing the hot-worked tubular
product to produce the desired shape, dimensions and properties.
The tubes shall be furnished in the following shapes: round,
square, rectangular and special sections. Heat analysis shall be
made to determine the percentages of the elements specified. If
secondary melting processes are used, the heat analysis shall be
obtained from one remelted ingot or the product of one remelted
ingot of each primary melt. The tubing shall be coated with a film
of oil before shaping to retard rust when specified.
Stamdard: ASTM A519
Main steel grades: 4130,4140
Application: A519 seamless tubing is commonly used in applications requiring
machining, heat treating, close tolerances, smooth finishes, and/or
definite physical properties.
Chemical Requirements & Mechanical Proterties:
| Grade | C | Mn | P≤ | S≤ | Si | Cr | Mo |
| 4130 | 0.28-0.33 | 0.40-0.60 | 0.040 | 0.050 | 0.15-0.35 | 0.80-1.10 | 0.15-0.25 |
| 4140 | 0.38-0.43 | 0.75-1.00 | 0.040 | 0.050 | 0.15-0.35 | 0.80-1.10 | 0.15-0.25 |
| Grade | Condition | MPa Tenslle Point | Yield Point | Elongation |
| 4130 | SR | ≥586 | ≥724 | ≥10% |
| A | ≥379 | ≥517 | ≥30% | |
| N | ≥414 | ≥621 | ≥20% | |
| 4140 | SR | ≥689 | ≥855 | ≥10% |
| A | ≥414 | ≥552 | ≥25% | |
| N | ≥621 | ≥855 | ≥20% |
Mark: As required.
Delivery status: Annealed, normalized, normalized+Tempered, etc.
End: plain end, beveled end, threaded
End protection: plastic caps
Packing: Exporting package/wooden box /as requirement.
