Seamless Alloy Steel ASTM A519 Pipe for Gas Cylinder and Structure
Pipe
1. Standards:
ASTM A519 Standard Specification for Seamless Carbon and Alloy
Steel Mechanical Tubing
2. Application:
For the Seamless steel pipes in large calibers for gas cylinders
3. Ordering Information
Quantity (feet, weight, or number of pieces),
Name of material (seamless carbon or alloy steel mechanical
tubing),
Form (round, square, rectangular or special shapes)
Dimensions (round, outside diameters and wall thickness)
Length (specific or random, mill lengths)
Manufacture (hot finished or cold finished)
Grade (4130, 4142, 4145 and 4157)
Condition (sizing method and thermal treatment)
Surface finish (special pickling, shot blasting, or ground outside
surface, if required)
Product analysis and chemical analysis, if required,
Special marking, and
Special packing.
4. Chemical Requirements
| Chemical Requirements |
| Grade Designation | Chemical Composition Limits, % |
| Carbon (C) | Manganese (Mn) | Phosphorous (P) | Sulfur (S) | Silicon (Si) | Chromium (Cr) | Molybdenum (Mo) |
| max | max |
| 4130 | 0.28-0.33 | 0.40-0.60 | 0.04 | 0.04 | 0.15-0.35 | 0.80-1.10 | 0.15-0.25 |
| 4142 | 0.40-0.45 | 0.75-1.00 | 0.04 | 0.04 | 0.15-0.35 | 0.80-1.10 | 0.15-0.25 |
| 4145 | 0.43-0.48 | 0.75-1.00 | 0.04 | 0.04 | 0.15-0.35 | 0.80-1.10 | 0.15-0.25 |
| 4147 | 0.40-0.50 | 0.75-1.00 | 0.04 | 0.04 | 0.15-0.35 | 0.80-1.10 | 0.15-0.25 |
5. Available Size Range
| OD | Thickness |
| mm | inch | mm |
| 559 | 22'' | 12~30 |
| 715 | | 20~40 |
| 914 | 36'' | 22.5~50 |
| *If the steel grades and size you are looking for are not listed
above, please contact us for further information. |
6. Manufacture
Hot Rolled or Cold Drawn
7. Manufacturing Process
Raw Material Inspection → Cold Centering → Heating → Piercing &
Rolling → SIzing → Heat Treatment → Testing → Finishing → NDE →
Visual & Dimension Inspection → Marking → Storing & Shipping
