JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
Jiangsu Mittel Steel Industrial Limited Supply all kinds of Stainless Steel Sheet/Plate/Coil/Round ,Flat ,Angle Bar/Stainless steel Seamless pipe /welded pipe /Elbow/Flange /Galvanized Steel sheet
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UNS S31703 Stainless Steel Seamless Pipe Hot Rolled Stainless Steel 317L SCH40 Stainless Steel Pipe
More informations of our stainless steel pipe
| Products | Stainless Steel Pipe &Tube |
| Model Number | 200 Series:201 202 |
| 300 Series:301 302 303 304 304L 309 309S 310 316 316L 316Ti 317L 321 904L | |
| 400 Series:410 420 430 440 | |
| Duplex stainless:2205 2507 | |
| Type | Flat/corrugated/checkered |
| Processing Service | Bending,Welding,Decoiling,Punching,Cutting, Moulding |
| Delivery Time | 3-10 days |
| Payment terms | 30%TT Advance+70% Balance against the copy of bill of loading |
| Sample | Sample Avaliable |
| Inspection | Accept Thrid Party Inspection |
| Port | Tianjin Shanghai Qingdao |
| Certification | ISO9001 |
| Packing | Standardsea worthy export packing or according to the customers' request. |
| Applications: | Kitchenware,home appliances,construction decoration,stairs,refrigerated container,burner parts,exhaust parts of auto |
| Container Size: | 20ft GP:5898mm(Length)x2352mm(Width)x2393mm(High)24-26CBM |
| 40ft GP:12032mm(Length)x2352mm(Width)x2393mm(High)54CBM | |
| 40ft HC:12032mm(Length)x2352mm(Width)x2698mm(High)68CBM |
Stainless 317 L has a high tensile and creep strength at elevated temperatures. Due to its excellent corrosion resistance it has been used in handling many of the chemicals used by the chemical process industries.
It has a supperior corrosion resistance in special applications where it is desired to reduce contamination to a minimum. 317L was developed primarily to resist more effectively the attack of sulfurous acid compounds. Howerver, its proven ability to combat corrosion has widened its use considerably and is now being used for many other industrial applications.
The low carbon content of 317L provides immunity to intergranular corrosion in applications where heavy cross sections cannot be annealed after welding or where low temperature stress relieving treatments are desired.
317L (00Cr19Ni13Mo3, SUS317L) alloy is based on molybdenum and austenitic stainless steel. It is more resistant to chemical corrosion than normal chrome-nickel austenitic stainless steel, such as 304 alloys. In addition, compared with conventional stainless steel, 317L alloys have higher ductility, anti-stress corrosion, compressive strength and high temperature resistance. It is a low carbon grade or L rating, which has the ability to resist sensitization during welding and heat treatment.
| Grade | 317 | 317L |
|---|---|---|
| UNS Designation | S31700 | S31703 |
| Carbon (C) Max. | 0.08 | 0.035* |
| Manganese (Mn) Max. | 2.00 | 2.00 |
| Phosphorous (P) Max. | 0.040 | 0.04 |
| Sulphur (S) Max. | 0.03 | 0.03 |
| Silicon (Si) Max. | 1.00 | 1.00 |
| Chromium (Cr) | 18.0–20.0 | 18.0–20.0 |
| Nickel (Ni) | 11.0–14.0 | 11.0–15.0 |
| Molybdenum (Mo) | 3.0–4.0 | 3.0–4.0 |
| Nitrogen (N) | — | — |
| Iron (Fe) | Bal. | Bal. |
| Other Elements | — | — |
| Material | Ultimate Tensile Strength (Mpa) | 0.2 % Yield Strength (Mpa) | % Elongation in 2" | Rockwell B Hardness |
| Alloy 317 | 515 | 205 | 35 | 95 |
| Alloy 317L | 515 | 205 | 40 | 95 |
| Minimum Mechanical Properties by ASTM A240 and ASME SA 240 | ||||
With hundreds of different types of steel alloys on the market, it can be tough to find the perfect metal for your application. In many buying processes, the first consideration is the cost of the metal rather than the performance of the metal—which can be a serious mistake.
There are some cases where paying extra for a different, higher-performing alloy is necessary.
What Makes Grade 317 SS Different from 304 & 316 SS?
Grade 304, 316, and 317 stainless steel are all considered austenitic stainless steel alloys. These alloys all share some similar properties, such as high strength, corrosion resistance, and high concentrations of chromium and nickel.
What separates 316 and 317 SS from 304 SS is that these higher-numbered alloys have added molybdenum in their formulation—grade 316 has about 2-3% molybdenum, and grade 317 has more than 3% molybdenum.
This added molybdenum greatly improves the steel’s resistance to pitting from chlorides, which is why grade 316 SS is often used in the chemical processing and marine industries.
However, this added molybdenum content also influences the cost of these two alloys. Grade 317 SS is generally more expensive than grade 316 SS. 316 SS, in turn, is more expensive than grade 304 SS. The exact extra cost varies based on the market at the time.
When is 317 SS Worth the Extra Cost Over 316 SS?
For most strongly corrosive applications, grade 316 should be more than enough to resist frequent exposure.
However, 317 does achieve better resistance to some specific corrosives than 304 or 316. As noted by an ATI Metals publication, in a boiling test solution of 1% hydrochloric acid, the corrosion rate of 317 SS was 54.2 mils/year, while 316 SS corroded at a rate of 226 mils/year. 317 SS also significantly outperforms 316 SS in sulfuric acid and sodium hydroxide tests.
So, if your processes involve the use of very diluted (less than 3-4%) hydrochloric acid, mild concentration (10%) sulfuric acid, or sodium hydroxide (aka caustic soda), then grade 317 stainless steel might be worth the extra cost over 316 or 304 SS.
It’s important to note that hydrochloric acid in any concentration above 5% will quickly erode any austenitic stainless steel alloy with ease.
Also, in the previously-cited chemical corrosion tests, 317 performed worse against some corrosives than 316, such as phosphoric acid (0.72 mils/year vs 0.2 mils/year) and acetic acid (0.48 mils/year vs 0.12 mils/year).
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