ASTM B668 28 Stainless Steel Seamless Pipe SMLS 10'' SCH20
ASTM B668 28 Stainless Steel Seamless Pipe SMLS 10'' SCH20
| Name | 28 Stainless Steel Seamless Pipe | |||||
| Standard | ASTM B668 28 | |||||
| Outer Diameter | 6mm--159mm | |||||
| Thickness | 0.25mm - 3.5mm | |||||
| Length | 6m or as customer's request | |||||
|
Tolerance |
a) Outer Diameter: +/- 0.2mm | |||||
| b) Thickness: +/- 0.02mm | ||||||
| c) Length: +/- 5mm | ||||||
| Surface |
180G, 320G, 400G Satin / Hairline 400G, 500G, 600G or 800G Mirror finish |
|||||
| Application | Decoration construction, upholstery, industry instrument | |||||
| Test | Squash test, extended test, water pressure test, crystal rot test, heat treatment, NDT | |||||
| Payment | Payment by T/T, 30% as advance payment and 70% balance pay before shipping. |
|
Delivery time |
A.7 days if this goods is stock goods. B.20 days if this goods will be produced after order |
| Validity | Valid time is 3 days for price usually. |
Alloy 28 is a nickel-iron-chromium austenitic alloy that was developed for maximum resistance to acid attack, specifically sulfuric acid. Thissuperalloy has excellent resistance to general corrosion, pitting, and crevice corrosion in chemicals containing chlorides and sulfuric, phosphoric, and nitric acids. It also contains niobium for stabilization against sensitization and resultant intergranular corrosion.
28 combines excellent corrosion resistance with elevated mechanical properties and relatively easy fabrication. Although originally designed for use in sulfuric acid related industries, 28 is now a popular choice for a wide variety of industries including the chemical, food, pharmaceutical, and plastics industries. In addition, this superalloy is used in heat exchangers, mixing tanks, metal cleaning and pickling equipment, and piping.
There has long been a debate on whether 28 is a stainless steel or a nickel alloy because the nickel content is right on the border of defining it as one way or the other. So, depending on who you talk to this alloy may be referred to as 28 Stainless Steel or as a nickel alloy. Either way it is still great for corrosion resistance.
What are the characteristics of Incoloy 28 ?
- Excellent general corrosion resistance to sulfuric acid
- Excellent resistance to chloride stress corrosion cracking
- Excellent mechanical properties and fabricability
- Minimal carbide precipitation during welding
- Excels in resisting corrosion to hot sulfuric acids
Chemical Composition, %
|
Ni
|
Fe
|
Cr
|
Cu
|
Mo
|
Nb
|
|---|---|---|---|---|---|
|
32.00-38.00
|
Balance
|
19.0-21.0
|
3.0-4.0
|
2.0-3.0
|
8xC-1.0max
|
|
C
|
Mn
|
P
|
S
|
Si
|
|
|---|---|---|---|---|---|
|
.07max
|
2.0max
|
.045max
|
.035max
|
1.0max
|
In what applications is Incoloy 28 used?
- Synthetic rubber manufacturing equipment
- Processing of pharmaceuticals, plastics and organic and heavy chemicals
- Tanks, piping, heat exchangers, pumps, valves, and other process equipment
- Acid cleaning and pickling equipment
- Chemical process piping, reactor vessels
- Bubble caps
- Petrochemical process equipment
- Food and dye production
ASTM Specifications
| Pipe Smls | Pipe Welded | Tube Smls | Tube Welded | Sheet/Plate |
Bar
|
Forging | Fitting |
|---|---|---|---|---|---|---|---|
| B729 | B464 | B729 | B468 | B463 |
B473
|
B462 | B366 |
Mechanical Properties
Annealed Material
| Form | Tensile Min. | Yield Min. (.2% offset) | Elongation Min. | Reduction of Area Min. |
|---|---|---|---|---|
| Bar (hot or cold finished) | 80 ksi | 35 ksi | 30% | 50% |
|
Sheet/Plate
|
80 ksi
|
35 ksi
|
30%
|
Product picture:
Packing&shipping:
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