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QUALITY: Commercial, electric furnace, bearing, aircraft and consumable electrode vacuum
melted quality steel.
TYPES: AISI carbon and alloy steels, intermediate alloy steels for high temperature and
corrosion-resisting applications. (Tubing can also be produced to customer specifications.)
FINISHES: Hot rolled, cold drawn, turned, Rotorolled(c) tubing.
SPECIAL QUALITY: Much of our production involves applications for aircraft, missiles,
anti-friction bearing, ordnance, etc.
ADVANTAGES: Seamless steel tubing falls into two classifications-
- mechanical tubing
- pressure tubing
MECHANICAL TUBING has three major advantages over solid forms:
- Because no boring is needed, raw material is conserved.
- Machining operations are fewer and can often be combined.
- Tooling is simplified; tool life is extended.
PRESSURE TUBING conveys fluids or gases under pressure. Made to resist high or low
temperatures, high pressures, oxidation, corrosion. Pressure tubing meets standard ASTM specifications as well as individual customer specifications.
MECHANICAL TUBING
The Timken Company is the world's largest manufacturer of seamless steel tubing for mechanical applications.
TIMKEN TUBE ENGINEERING SYSTEM.
The Timken Company offers complete engineering assistance for developing mechanical typing applications.
PRESSURE TUBING
The Timken Company pioneered the development and applications of low and intermediate alloy steels for high temperature service and maintains continuous research in
high-temperature properties. We produce a complete line of low and intermediate alloy high temperature steels.
Pressure tubing falls into these classifications:
- Ultra high strength and corrosion-resistant oil and gas well tubing and casing.
- Tubes for steam power, nuclear power and chemical industries.
- Pressure and high temperature steam tubing.
- Tubing for low temperature service.
SIZES AND FINISHES
Hot Rolled
Wall Thicknesses
Maximum |
Range of Sizes
Outside Diameter |
| mm |
inches |
mm inclusive |
inches |
| 12.70 |
0.500 |
50.80 - 57.15 |
2 - 2 1/4 |
| 15.88 |
0.625 |
>57.15 - 63.50 |
2 1/4 - 2 1/2 |
| 17.48 |
0.688 |
>63.50 - 69.85 |
2 1/2 - 2 3/4 |
| 19.05 |
0.750 |
>69.85 - 76.20 |
2 3/4 - 3 |
| 22.22 |
0.875 |
>76.20 - 82.55 |
3 - 3 1/4 |
| 23.80 |
0.937 |
>82.55 - 88.90 |
3 1/4 - 3 1/2 |
| 25.40 |
1.000 |
>88.90 - 95.25 |
3 1/2 - 3 1/4 |
| 28.58 |
1.125 |
>95.25 - 101.60 |
3 3/4 - 4 |
| 31.75 |
1.250 |
>101.60 - 114.30 |
4 - 4 1/2 |
| 34.92 |
1.375 |
>114.30 - 127.00 |
4 1/2 - 5 |
| 38.10 |
1.500 |
>127.00 - 139.70 |
5 - 5 1/2 |
| 41.28 |
1.625 |
>139.70 - 152.40 |
5 1/2 - 6 |
| 46.05 |
1.813 |
>152.40 - 165.10 |
6 - 6 1/2 |
| 50.80 |
2.000 |
>165.10 - 177.80 |
6 1/2 - 7 |
| 63.50 |
2.500 |
>177.80 - 190.50 |
7 - 7 1/2 |
| 63.50 |
2.500 |
>190.50 - 203.20 |
7 1/2 - 8 |
| 69.85 |
2.750 |
>203.20 - 215.90 |
8 - 8 1/2 |
| 76.20 |
3.000 |
>215.90 - 234.95 |
8 1/2 - 9 1/4 |
| 76.20 |
3.000 |
>234.95 - 254.00 |
9 1/4 - 10 |
| 82.55 |
3.250 |
>254.00 - 279.40 |
10 - 11 |
| 50.80 |
2.000 |
>279.40 - 304.80 |
11 - 12 |
Hot rolled tubing has a surface finish comparable to hot rolled bars, plates or sheets of equal
thickness. Any decimal size outside diameter and wall thickness within the range specified can be furnished.
Cold Drawn
Wall Thicknesses
Maximum |
Range of Sizes
Outside Diameter |
| mm |
inches |
mm inclusive |
inches |
| 11.10 |
0.437 |
50.80 - 57.15 |
2 - 2 1/4 |
| 12.70 |
0.500 |
>57.15 - 63.50 |
2 1/4 - 2 1/2 |
| 14.30 |
0.563 |
>63.50 - 69.85 |
2 1/2 - 2 3/4 |
| 15.88 |
0.625 |
>>69.85 - 76.20 |
2 3/4 - 3 |
| 16.66 |
0.656 |
>76.20 - 82.55 |
3 - 3 1/4 |
| 17.48 |
0.688 |
>82.55 - 88.90 |
3 1/4 - 3 1/2 |
| 19.05 |
0.750 |
>88.90 - 95.25 |
3 1/2 - 3 3/4 |
| 22.22 |
0.875 |
>95.25 - 107.95 |
3 3/4 - 4 1/4 |
| 24.59 |
0.968 |
>107.95 - 120.65 |
4 1/4 - 4 3/4 |
| 26.97 |
1.062 |
>120.65 - 133.35 |
4 3/4 - 5 1/4 |
| 28.58 |
1.125 |
>133.35 - 146.05 |
5 1/4 - 5 3/4 |
| 30.18 |
1.188 |
>146.05 - 158.75 |
5 3/4 - 6 1/4 |
| 31.75 |
1.250 |
>158.75 - 171.45 |
6 1/4 - 6 3/4 |
| 31.75 |
1.250 |
>171.45 - 184.15 |
6 3/4 - 7 1/4 |
| 31.75 |
1.250 |
>184.14 - 196.85 |
7 1/4 - 7 3/4 |
| 31.75 |
1.250 |
>196.85 - 209.55 |
7 3/4 - 8 1/4 |
| 31.75 |
1.250 |
>209.55 - 228.60 |
8 1/4 - 9 |
| 31.75 |
1.250 |
>228.60 - 266.70 |
9 - 10 1/2 |
Cold drawn tubing is produced from hot rolled tubes that have been carefully inspected and properly
surface-conditioned.
It can be furnished to any decimal (or fraction) size, both outside diameter and wall, within the given range.
Turned
Wall Thicknesses
Maximum |
Range of Sizes
Outside Diameter |
| mm |
inches |
mm inclusive |
inches |
| 14.27 |
0.562 |
50.80 - 60.32 |
2 - 2 3/8 |
| 15.88 |
0.625 |
>60.32 - 66.68 |
2 3/8 - 2 5/8 |
| 17.48 |
0.688 |
>66.68 - 73.02 |
2 5/8 - 2 7/8 |
| 20.62 |
0.812 |
>73.02 - 79.38 |
2 7/8 - 3 1/8 |
| 22.22 |
0.875 |
>79.38 - 85.72 |
3 1/8 - 3 3/8 |
| 23.80 |
0.937 |
>85.72 - 92.08 |
3 3/8 - 3 5/8 |
| 26.97 |
1.062 |
>92.08 - 98.42 |
3 5/8 - 3 7/8 |
| 30.18 |
1.188 |
>98.42 - 111.42 |
3 7/8 - 4 3/8 |
| 33.32 |
1.312 |
>111.12 - 123.82 |
4 3/8 - 4 7/8 |
| 36.50 |
1.437 |
>123.82 - 136.52 |
4 7/8 - 5 3/8 |
| 39.67 |
1.562 |
>136.52 - 149.22 |
5 3/8 - 5 7/8 |
| 44.45 |
1.750 |
>149.22 - 161.92 |
5 7/8 - 6 3/8 |
| 49.20 |
1.937 |
>161.92 - 174.62 |
6 3/8 - 6 7/8 |
| 61.90 |
2.437 |
>174.62 - 187.32 |
6 7/8 - 7 3/8 |
| 61.90 |
2.437 |
>187.32 - 200.02 |
7 3/8 - 7 7/8 |
Turned tubing is used in automatic screw machines for special applications requiring close outside
diameter tolerance or clean outside surface.
Any decimal or fractional outside diameter and wall within the given range can be specified. Any steel that can be pierced and machined can be supplied in the
turned condition.
Rotorolled Tubing
Lightest
Wall Thicknesses |
Range of Sizes
Outside Diameter |
| mm |
inches |
mm inclusive |
inches |
| 2.77 |
0.109 |
38.10 - 50.80 |
1 1/2 - 2 |
| 3.18 |
0.125 |
>50.80 - 76.20 |
2 - 3 |
| 4.78 |
0.188 |
>76.20 - 101.60 |
3 - 4 |
| 6.35 |
0.250 |
>101.60 - 139.70 |
4 - 5 1/2 |
"Rotorolled" tubing is a premium product with a superior surface finish. Machinability and
dimensional tolerances are excellent.
The heaviest wall thicknesses are 1/3 of the outside diameter or 1 inch, whichever is smaller.
Timken Mechanical Tubing available in warehouse stock
We maintain a large mill stock of three popular grades of alloy mechanical tubing, which can usually be shipped within 24 hours after your order is received.
E-8620, a fine-grained alloy carburized steel, has excellent machinability. After carburizing and oil quenching, it develops a hard case and good core properties.
E-52100 and A485-3 are oil hardening steels with high wear-resistance and abrasion-resistance.
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