While grade 316, which contains molybdenum, has a molybdenum content of between 2% and 3%, grade 317 is an alloy with a moly content of over 3%. Therefore, it is safe to state that marine grade alloy 316 has been upgraded, giving rise to stainless steel 317L seamless pipe. The alloy also contains nickel and chromium in addition to molybdenum. The ASTM A312 TP 317 Rectangular Pipe thus has greater corrosion resistance qualities.
As a result, the substance exhibits greater resistance to a variety of acidic solutions, such as acetic acid, formic acid, citric acid, sulphurous acid, and tartaric acid. These acids are utilised in a variety of industries, including textile, pharmaceutical, food, and beverage. The ASTM A312 TP 317L Square Pipe functions well in these circumstances, making it a valuable asset in these enterprises. This alloy has only a little amount of carbon. Thus, the schedule 40 pipe made to DIN 1.4438 shows resistance to sensitization during welding operations.
The UNS S31703 ERW Pipe offers various advantages because of its low carbon content, including stronger creep strength, higher stress to rupture, along with no negative effects on its tensile strength properties at high temperatures. In reality, the SS 317L Welded Pipe's tensile strength increases as a result of the increased concentrations of elements like chromium, molybdenum, and nickel present in it. The difference between 317 Vs 317L SS Pipe is that grade 317L has an even lower concentration of carbon despite the alloy having a low carbon content.
|Standard Specification||ASTM A 312/ ASME SA 312/ A790/ SA790/ EN10216-5|
|Size||½” to 6” NB Sch 10s, 40s, & 80s, 160s|
|Wall Thickness||0.1 - 60 mm|
|SS Seamless Pipe Length||
|Seamless SS Pipe Surface Finish||Cold Finish, Bright, Polished, Annealing, Pickling, or as per client requirements|
|Standard||JIS, AISI, ASME, ASTM, AMS, GB, DIN, EN, GOST|
|Manufacturing types||Seamless, Welded, ERW, EFW|
|Manufacturing Shapes||Round, Square, Rectangle, Box Section|
|Manufacturing Technology||Hot / Cold Formed|
|Other Grades||SS 446|
|Inspection, Test Reports||EN 10204 3.1, Mill Test Certificates, PMI Test Reports, Chemical Reports, Mechanical Reports, NABL Approved Lab Reports, Visual Inspection Reports, Destructive and Non Destructive Test Reports, Third Party Inspection|
|Technique||Cold Rolled Hot Rolled|
|317L||0.035 max||2 max||1 max||0.040 max||0.03 max||18 – 20||3 – 4||11 – 15||–|
|Melting Point||1454 °C (2650 °F)|
|Tensile Strength||Psi – 75000 , MPa – 515|
|Yield Strength (0.2%Offset)||Psi – 30000 , MPa – 205|
|NPS||ASTM A312 OD Tolerance|
|1/8~1 1 /2||1/64(0.015)||0.4||1/32(0.031)||0.8|
|> 1 1 /2~4||1/32(0.031)||0.8||1/32(0.031)||0.8|