ASTM A519 standard 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. The specification covers both seamless hot-finished mechanical tubing and seamless cold-finished mechanical tubing in sizes up to and including 12 3/4 in. [325 mm] outside diameter for round tubes with wall thicknesses as required.

|
Grade Designation |
Carbon |
Manganese |
Phosphorous, max |
Sulfur, max |
|
1008 |
0.10 max |
0.30–0.50 |
0.040 |
0.050 |
|
1010 |
0.08–0.13 |
0.30–0.60 |
0.040 |
0.050 |
|
1012 |
0.10–0.15 |
0.30–0.60 |
0.040 |
0.050 |
|
1015 |
0.13–0.18 |
0.30–0.60 |
0.040 |
0.050 |
|
1016 |
0.13–0.18 |
0.60–0.90 |
0.040 |
0.050 |
|
1017 |
0.15–0.20 |
0.30–0.60 |
0.040 |
0.050 |
|
1018 |
0.15–0.20 |
0.60–0.90 |
0.040 |
0.050 |
|
1019 |
0.15–0.20 |
0.70–1.00 |
0.040 |
0.050 |
|
0.18–0.23 |
0.30–0.60 |
0.040 |
0.050 |
|
|
1021 |
0.18–0.23 |
0.60–0.90 |
0.040 |
0.050 |
|
1022 |
0.18–0.23 |
0.70–1.00 |
0.040 |
0.050 |
|
1025 |
0.22–0.28 |
0.30–0.60 |
0.040 |
0.050 |
|
1026 |
0.22–0.28 |
0.60–0.90 |
0.040 |
0.050 |
|
1030 |
0.28–0.34 |
0.60–0.90 |
0.040 |
0.050 |
|
1035 |
0.32–0.38 |
0.60–0.90 |
0.040 |
0.050 |
|
0.37–0.44 |
0.60–0.90 |
0.040 |
0.050 |
|
|
1045 |
0.43–0.50 |
0.60–0.90 |
0.040 |
0.050 |
|
1050 |
0.48–0.55 |
0.60–0.90 |
0.040 |
0.050 |