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| Product Name:: | Seamless Steel Tube | Technique:: | Seamless |
|---|---|---|---|
| Materials: | Nickel Alloy Stainless Steel | Production: | Cold Finish |
Seamless, Cold-worked or Hot-finished pipe
and tube intended for general corrosive service.
Steel Grade: UNS N08904,UNS N08925,and UNS N08926
Materials and Manufacture:
The material is supplied in the solution-treated condition
Tests:
Chemical Analysis - One test per lot
Machanical Properties - One test per lot
Non-destructive Test - Each Piece in each lot
Average Diameter:
The average if the maximum and minimum outside diameters as determined at any one cross section of the tube or pipe
Pipe- Seamless tube conforming to the particular dimensions commerccially known as standard pipe sizes
Tube- a hollow products of round or any othjer cross section having a continuous periphery.
TABLE 1 Chemical Requirements
|
Element |
UNS N08904 |
UNS N08925 |
UNS N08925 |
Product(check)Analysis Variations,under min or over max of the Specified Limit of Element,% |
|
|
UNS N08904 UNS N08925 |
UNS N08926 |
||||
|
Carbon,max |
0.020 |
0.020 |
0.020 |
0.005 |
0.005 |
|
Manganese,max |
2.0 |
1.0 |
2.0 |
0.04 |
0.04 |
|
Phosphorus,max |
0.045 |
0.045 |
0.03 |
0.005 |
0.005 |
|
Sulfur,max |
0.035 |
0.030 |
0.01 |
0.005 |
0.003 |
|
Silicon,max |
1.00 |
0.50 |
0.5 |
0.20 |
0.03 |
|
Nickel |
23.0 to 28.0 |
24.0 to 26.0 |
24.0 to 26.0 |
0.20 |
0.25 |
|
Chromium |
19.0 to 23.0 |
19.0 to 21.0 |
19.0 to 21.0 |
0.20 |
0.25 |
|
Molybdenum |
4.0 to 5.0 |
6.0 to 7.0 |
6.0 to 7.0 |
0.10 |
0.15 |
|
Copper |
1.0 to 2.0 |
0.8 to 1.5 |
0.5 to 1.5 |
0.10 |
0.04 |
|
Nitrogen |
… |
0.1 to 0.2 |
0.15 to 0.25 |
… |
0.01 |
|
IronA |
balance |
balance |
balance |
… |
… |
TABLE 2 Mechanical Properties of Pipe and Tube
|
Alloy |
Temper |
TensileStrength, min,psi(MPa) |
YieldStrength,0.2% offset,min,psi(MPa) |
Elongation in 2 in.or 50 mm(or 4D),min,% |
|
UNS N08904 |
Solution annealed |
71(490) |
31(220) |
35 |
|
UNS N08925 |
Solution annealed |
87(600) |
43(300) |
40 |
|
UNS N08926 |
Solution annealed |
94(650) |
43(295) |
35 |
Reference Documents:
A 450/A450M Specifications for General Requirements for Carbon, Ferritic Alloy, Austenitic Alloy Steel Tubes
E 8 Test Methods for Tension Testing of Metallic Materials
E 29 Practice for Using Significant Digits in Test Data to Determine Conformance with specifications
E 354 Test Methods for Chemical Analysis o High Temperature, Electrical , Magnetic , and Other Similar Iron, Nickel, and Cobalt Alloys
