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Pipe Type: Stainless Steel Pipe, Stainless Steel Tube, Stainless Steel Tubing
Application: In Chemical Industry, Coal, Oil Field Open Machine, Building Materials Heat-resistant Parts
Specification: Outside Diameter: 1/8''~24''
Wall Thickness: SCH 5 ~ Double Extra Heavy
Standard: ASTM A213, ASTM A269, ASTM A312, ASTM A789, JIS G3459
Steel Grades: 304, 304L, 310/S, 310H, 316, 316L, 321, 321H
Surface: Annealed, Pickling, Polished
Packing: Waterproof Paper Wrapped, Packed in Wooden Cabins
For details, delivery time and prices, please mail us
Seamless Stainless Steel TubingThe most common seamless stainless steel tubing is the 300 series of alloys, which are classified as austenitic and are hardenable only by cold working methods and available in varieties of high-performance, corrosion-resistant types and sizes. These stainless steel alloys most commonly include chromium, nickel, molybdenum and titanium, and are ideal for seamless coil tubing because this series of stainless steel alloys are known to resist corrosion while maintaining their strength at high temperatures.
Chemical Composition
|
Grades |
C max |
Mn max |
P max |
S max |
Si max |
Cr |
Ni |
Mo |
|
304 |
0.08 |
2.00 |
0.04 |
0.03 |
0.075 |
18.00-20.00 |
8.00-11.00 |
/ |
|
304L |
0.035 |
2.00 |
0.04 |
0.03 |
0.075 |
18.00-20.00 |
8.00-13.00 |
/ |
|
316 |
0.08 |
2.00 |
0.04 |
0.03 |
0.075 |
16.00-18.00 |
11.00-14.00 |
2.00-3.00 |
|
316L |
0.035 |
2.00 |
0.04 |
0.03 |
0.075 |
16.00-18.00 |
10.00-15.00 |
2.00-3.00 |
Mechanical Properties
|
Grades |
Itemper |
Tensile Psi |
Yield Psi |
Elong % |
Rockwell Hardness |
|
304 |
Annealed |
85000-105000 |
35000-75000 |
20-55 |
80-95 |
|
304L |
Annealed |
80000-105000 |
30000-75000 |
20-55 |
75-95 |
|
316 |
Annealed |
85000 min |
35000 min |
50 min |
80 min |
|
|
Annealed |
80000 min |
30000 min |
50 min |
75 min |
| ASTM SPECIFICATION & TOLERANCE FOR TUBING & PIPING | ||||||||
| Specification | Allowable Outside Diameter | Allowable Wall | Exact Length | Testing | ||||
| Variation in mm | Thickness Variation | Tolerance in mm | ||||||
| Nominal Diameter | Over | Under | %Over | %Under | Over | Under |
Flattening Test Tension Test Flare Test Hardness Test 100% Hydrostatic test Refer to ASTM A-450 |
|
| ASTM-A213 Seamless Boiler Superheater and Heat Exchanger Tubes | Under 25.4 | 0.1016 | 0.1016 | 20 | 0 | 3.175 | 0 | |
| 25.4-38.1 incl | 0.1524 | 0.1524 | 22 | 0 | 3.175 | 0 | ||
| 38.1-50.8 excl | 0.2032 | 0.2032 | 22 | 0 | 3.176 | 0 | ||
| 50.8-63.5 excl | 0.254 | 0.254 | 22 | 0 | 4.46 | 0 | ||
| 63.5-76.2 excl | 0.3048 | 0.3048 | 22 | 0 | 4.76 | 0 | ||
| 76.2-101.6 incl | 0.381 | 0.381 | 22 | 0 | 4.76 | 0 | ||
| ASTM-A249 Welded Boiler Superheater, Heat Exchanger And Condenser Tubes | Under 25.4 | 0.1016 | 0.1016 | 10 | -10 | 3.175 | 0 |
Tension Test Flattening Test Flange Test Reverse Bend Test Hardness Test 100% Hydrostastic Test Refer to ASTM A-450 |
| 25.4-38.1 incl | 0.1524 | 0.1524 | 10 | -10 | 3.175 | 0 | ||
| 38.1-50.8 Excl | 0.2032 | 0.2032 | 10 | -10 | 3.175 | 0 | ||
| 50.0-63.5 excl | 0.254 | 0.254 | 10 | -10 | 4.762 | 0 | ||
| 63.5-76.2 excl | 0.3848 | 0.3048 | 10 | -10 | 4.762 | 0 | ||
| 76.2-101.6 incl | 0.381 | 0.381 | 10 | -10 | 4.762 | 0 | ||
|
Minimum Wall tubes + 18% 0 available On request |
||||||||
| ASTM-A269 Seamless & Welded Tubing for General Service | Untp 12.7 | 0.13 | 0.13 | 15 | -15 | 3.2 | 0 |
Flare Test (Seamless Only) Flange Test (Welded Only) Hardness Test Reverse Flattening Test (Welded only) 100% Hydrostatic Test Refer to ASTM-A269 |
| 12.7-38.1 excl | 0.13 | 0.13 | 10 | -10 | 3.2 | 0 | ||
| 38.1-88.9 excl | 0.25 | 0.25 | 10 | -10 | 4.8 | 0 | ||
| 88.9-139.7 excl | 0.38 | 0.38 | 10 | -10 | 4.8 | 0 | ||
| 139.7-203.2 excl | 0.76 | 0.76 | 10 | -10 | 4.8 | 0 | ||
| ASTM-A270 Seamless & Welded Sanitary Tubing | 25.4 | 0.05 | 0.2 | 10 | -10 | 3.2 | 0 |
Reverse flattening Test 100% Hydrostastic Test External’ polish on all tubes Refer to ASTM A-270 |
| 38.1 | 0.05 | 0.2 | 10 | -10 | 3.2 | 0 | ||
| 50.8 | 0.05 | 0.28 | 10 | -10 | 3.2 | 0 | ||
| 60.5 | 0.05 | 0.28 | 10 | -10 | 3.2 | 0 | ||
| 76.2 | 0.08 | 0.3 | 10 | -10 | 3.2 | 0 | ||
| 101.6 | 0.08 | 0.38 | 10 | -10 | 4.8 | 0 | ||
| ASTM-A312 Seemless & Welded pipe | 3.175-38.1 incl | 0.4 | 0.79 | Minimum Wall 12.5% under nominal wall Specified | 6.4 | 0 |
Tension Test Flattening Test 100% Hydrostatic Test Refer to ASTM A-530 |
|
| 38.1-1016 incl | 0.79 | 0.79 | 6.4 | 0 | ||||
| 101.6-203.2 incl | 1.59 | 0.79 | 6.4 | 0 | ||||
| (Normally Random Lengths ordered) | ||||||||
| ASTM A-358 Welded pipe | 219.08-750mm | 0.50% | -0.3 | 6 | Refer to ASTM A-530 | |||
Packing: Waterproof Paper Wrapped, Packed in Wooden Cabins
hardness :
Stainless steel tubes are commonly used to measure the hardness of Brinell, Rockwell and Vickers. Brinell hardness Among the stainless steel pipe standards, Brinell hardness is the most widely used, and the hardness of the material is often expressed by the indentation diameter, which is both intuitive and convenient. However, it is not suitable for steel pipes of harder or thinner steel.
Rockwell hardness:
The stainless steel tube Rockwell hardness test is the same as the Brinell hardness test. The difference is that it measures the depth of the indentation. The Rockwell hardness test is a widely used method in which HRC is used second only to Brinell hardness HB in steel pipe standards. Rockwell hardness can be applied to the determination of metal materials from extremely soft to very hard. It compensates for the Brinell method. It is simpler than the Brinell method and can directly read the hardness value from the dial of the hardness machine. However, due to its small indentation, the hardness value is not as accurate as the Brinell method.
Vickers hardness
The stainless steel tube Vickers hardness test is also an indentation test method for measuring very thin metal materials and surface layer hardness. It has the main advantages of Brinell and Rockwell methods, and overcomes their basic shortcomings, but it is not as simple as the Rockwell method. The Vickers method is rarely used in steel pipe standards.
Hardness test
The stainless steel tube has an inner diameter of 6.0mm or more and an annealed stainless steel tube with a wall thickness of 13mm or less. It can be a W-B75 type Vickers hardness tester. It is very fast and simple to test and is suitable for rapid and non-destructive inspection of stainless steel pipes. Stainless steel tubes with an inner diameter of more than 30 mm and a wall thickness greater than 1.2 mm are tested with a Rockwell hardness tester to test HRB and HRC hardness. Stainless steel tubes with an inner diameter of more than 30 mm and a wall thickness of less than 1.2 mm are tested with a surface Rockwell hardness tester to test HRT or HRN hardness. For stainless steel pipes with an inner diameter of less than 0 mm and greater than 4.8 mm, the hardness of HR15T is tested by a special Rockwell hardness tester for pipes. When the inner diameter of the stainless steel tube is larger than 26 mm, the hardness of the inner wall of the tube can also be tested by a Rockwell or surface Rockwell hardness tester.