ASTM A519
Seamless Mechanical Tubing
ASTM A519 seamless carbon and alloy steel mechanical tubing, hot finished or cold drawn, for machined and formed parts.
ASTM A519 mechanical tubing
OVERVIEW
Tubing bought to be made into parts.
ASTM A519 covers seamless carbon and alloy steel mechanical tubing. It is written for tube that will be machined, formed or heat treated into a finished part, so size and finish matter more than pressure rating.
Tubing can be ordered hot finished or cold drawn and sized by any two of OD, ID and wall. Mechanical properties apply only when they are specified on the order. A519 is an ASTM specification without an ASME SA counterpart. Every order ships with an MTR stating heat number and country of melt.
✓ Carbon grades such as 1018, 1020 and 1026
✓ Alloy grades including 4130 and 4140
✓ Hot finished or cold drawn
✓ Sized by any two of OD, ID and wall
✓ Cut lengths and full MTR
✓ Alloy grades including 4130 and 4140
✓ Hot finished or cold drawn
✓ Sized by any two of OD, ID and wall
✓ Cut lengths and full MTR
ASTM A519 mechanical tubing
SPECIFICATION SUMMARY
What the standard requires.
Key requirements
| Requirement | ASTM A519 |
|---|---|
| Scope | Seamless carbon and alloy steel mechanical tubing |
| Typical carbon grades | 1018, 1020, 1026 |
| Typical alloy grades | 4130, 4140 |
| Condition | Hot finished or cold drawn, with stress-relieved, annealed or normalized conditions available |
| Ordering dimensions | Any two of OD, ID and wall |
| Mechanical properties | Required only when specified on the order |
| Hydrostatic test | Not required by the standard |
| Note | Values summarize the standard. Your purchase order governs the edition and any supplementary requirements. |
APPLICATIONS & INDUSTRIES
Where these tubes get used.
GRADES
Carbon and chrome-moly.
STRUCTURAL ALTERNATIVE
ASTM A500
When the tube carries load rather than becoming a part.
TECHNICAL ARTICLES
Latest insights on mechanical tubing.
ARTICLE
ASTM A500 vs A519 Mechanical Tubes
Which specification fits a structural member and which fits a machined part.
ARTICLE
4130 vs 4140 Alloy Tubes
Strength, weldability and heat-treat response of the two chrome-moly grades.
ARTICLE
Round vs Rectangular Hollow Sections
How section shape changes stiffness, connections and fabrication cost.
RELATED PRODUCTS
Often paired with.
RELATED
Mechanical & Structural Tubes
ASTM A519 mechanical and ASTM A500 structural tubing.
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