A519 mechanical tube refers to seamless carbon steel and alloy steel mechanical tubes produced in accordance with ASTM A519 standards.
This 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.
ASTM A519 standard covers multiple grades of carbon and alloy steel seamless mechanical tubing, including both heat-treated and cold-worked conditions, in sizes up to round tubes 12 3/4 inches (323.8 mm) in diameter or smaller. and the required wall thickness.
①Precise size control
ASTM A519 mechanical tube itself is a kind of seamless tube. One of the characteristics of seamless tube is its high precision, and this mechanical tube is made by cold rolling or hot rolling process, which can control the size of the steel pipe more strictly.
②High strength and toughness
By heat treating this metal material, the strength and toughness of the mechanical tube can be improved. Heat treatment is a very important step in metal material processing. Heat treatment can change the physical and mechanical properties of the metal material and improve its hardness, strength, toughness and other properties.
③Various sizes and shapes
A519 Mechanical Tube comes in a variety of sizes and shapes, including round, square, rectangular and special cross-sections.
①Low-carbon steel
② Chemical requirements of other carbon steels
③Chemical requirements of resulfurized and/or rephosphorized, carbon steels
This 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.
ASTM A519 standard covers multiple grades of carbon and alloy steel seamless mechanical tubing, including both heat-treated and cold-worked conditions, in sizes up to round tubes 12 3/4 inches (323.8 mm) in diameter or smaller. and the required wall thickness.
1. ASTM A519 mechanical tube properties
①Precise size controlASTM A519 mechanical tube itself is a kind of seamless tube. One of the characteristics of seamless tube is its high precision, and this mechanical tube is made by cold rolling or hot rolling process, which can control the size of the steel pipe more strictly.
②High strength and toughness
By heat treating this metal material, the strength and toughness of the mechanical tube can be improved. Heat treatment is a very important step in metal material processing. Heat treatment can change the physical and mechanical properties of the metal material and improve its hardness, strength, toughness and other properties.
③Various sizes and shapes
A519 Mechanical Tube comes in a variety of sizes and shapes, including round, square, rectangular and special cross-sections.
2.Chemical Requirements of ASTM A519 mechanical tube
①Low-carbon steel② Chemical requirements of other carbon steels
③Chemical requirements of resulfurized and/or rephosphorized, carbon steels
3.Outside diameter tolerances for round hot-finished tubing
4.Outside and
4.Outside and inside diameter tolerances for round cold-worked tubing
5.Mechanical properties for ASTM A519 Grade 1026, Grade 4140, Grade 4130, and Grade 1018
| ASTM Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (Brinell) | Other Properties |
|---|---|---|---|---|---|
| 1026 | 490 | 415 | 15 | 143 | ------ |
| 4140 | 655 - 1075 | 415 - 986 | 15.5 - 25.7 | 207 (Annealed) | 190-210 GPa Elongation at break, 0.27-0.30 Poisson’s ratio |
| 4130 | ≥930 | ≥785 | ≥12 | ≤229 HB | ------ |
| 1018 | Varies | Varies | Varies | Varies | Typically higher elongation, lower hardness |
