SS 316lmod Seamless Pipe | Grade 724L 1.4435 Tube, Supplier Manufacturer, Contact us to get price list, Sizes & Free Sample!
316L Mod stainless steel is an upgraded material with optimized composition and performance on the basis of traditional 316L austenitic stainless steel. By adjusting the alloy element ratio and manufacturing process, it significantly improves corrosion resistance, mechanical strength and welding performance, making it an ideal choice for harsh corrosive environments. HT PIPE is a Stainless steel 316Lmod Pipe supplier with 15+ export experience. Contact us for more information and quotes for free!
316L Urea Grade Stainless Steel Pipe, Tube Chemical Composition
| Grade | UNS | C≤ | Mn | P≤ | S≤ | Si≤ | Cr | Mo | Ni | N≤ |
| TP316L | S31603 | 0.03 | 2 | 0.045 | 0.03 | 1 | 16.0-18.0 | 2.00-3.00 | 11.0-14.0 | 0.1 |
Manufacturing and processing of Stainless steel 316lmod
Forming process of 1.4435 pipe
mainly cold rolling, balancing work hardening and structural uniformity through multiple rolling and intermediate annealing (solid solution treatment at 1050-1150℃). Hot forming should avoid staying in the sensitization range of 450-850℃ to prevent carbide precipitation.
Welding specification of ss316lmod tube
TIG welding or laser welding is recommended, using ER316L Mod or ERNiCrMo-3 welding wire, controlling heat input ≤1.5 kJ/mm, and interlayer temperature ≤100℃. Pickling and passivation (nitric acid-hydrofluoric acid mixture) are required after welding to restore the surface passivation film.
Surface treatment of s316l mod pipe
electrolytic polishing or mechanical polishing to Ra≤0.8 μm to reduce the risk of pitting initiation caused by surface defects. For deep-sea applications, titanium alloy coating or cathodic protection can be added to enhance protection.
Standard system and quality control of 316lmod stainless steel
Material standards of Grade 724L 1.4435 Tube
ASTM A312/A312M (austenitic stainless steel seamless and welded pipes), ASTM A269 (general seamless and welded pipes), some special applications refer to NACE MR0175/ISO 15156 (sulfide stress corrosion resistance specification).
Corrosion test of SS 316lmod Seamless & welded Pipe
72-hour pitting test (6% FeCl₃ solution, 35°C) according to ASTM G48 method A, requiring no visible pits; SCC sensitivity in boiling MgCl₂ solution is evaluated according to ASTM G36.
Non-destructive testing of 316l mod
100% eddy current testing (ET) ensures that surface defects are controllable, and high-pressure conditions require additional ultrasonic testing (UT) or radiographic testing (RT).
