| Customization: | Available |
|---|---|
| Type: | Stainless Steel Pipes |
| Standard: | ASTM, AISI, GB, JIS, DIN, EN |
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LORK is a special stainless steel manufacturer with 20 years of manufacturing experience.
316LMOD is urea grade stainless steel 724L/1.4435.Urea steel and 316Lmod are stainless steels developed for urea production on the basis of 316L.Additional restrictions have been placed on the minimum content of Cr, Ni, and Mo; The purpose is to make stainless steel undergo final heat treatment. After obtaining a fully austenitic structure, the ferrite content should not exceed 0.6%, while also exhibiting a tendency towards intergranular corrosion. Requirements have been proposed for testing and selective corrosion.
Stainless Steel 316LMOD Applications
Typical applications include:
EN 10088 / EN 10028 ......... X2 Cr Ni Mo 18-14-3 - 1.4435
AFNOR................................Z3 CND 18.14.03
DIN...................................... W.Nr 1.4435
ASTM. ............................... 316L modified
Weight % (all values are maximum unless a range is otherwise indicated)
| Grade | Compsition Chemical (Max %) | |||||||||
| C | Si | Mn | P | S | Cr | Ni | Mo | N | Fe | |
| 316L MOD | ≤0.03 | ≤1.000 | ≤2.00 | ≤0.04 | ≤0.030 | 17-18.5 | 13-15 | 2.2-3 | ≤0.22 | ≤0.6 |
Stainless Steel 316LMOD Mechanical Properties
| Temperature | 20° C | 50° C | 100° C | 150° C | 200° C | 250° C | 300° C | 350° C | 400° C |
| TS (Mpa) | 485 | 470 | 450 | 430 | 415 | 410 | 400 | 395 | 390 |
| YS (Mpa) 0.2% | 190 | 180 | 165 | 150 | 140 | 130 | 120 | 115 | 110 |
| YS (Mpa) 1% | 225 | 200 | 180 | 165 | 155 | 145 | 140 | 135 |
Hot forming
Hot forming should be carried out in a temperature range of 1200-950C (2732- 1742F) after the piece has been uniformely heat treated. Final full annealing tremperature is required to obtain the requested microstructure. It will be performed at 1120-1180C (2048-2156F) followed by water quenching.
Cold forming
Due to its fully austenitic microstructure, the alloy can be cold formed without any problem. The higher molybdenum content and cold hardening behaviour of the steel explains that it may require more powerfull equipments than 304 stainless steel.
Pickling
The UREA Modified grade must be used in the as pickled and passivated conditions. Pickling treatment may be performed with a nitro-hydrofluoric acid bath (10-20 % HN03 - 1.5-5% HF) at room temperature (few hours) or 20 minutes approx. at 60C (140F). 10-20% H2SO4 - 1.5-5% HF pickling bath may also be used.
Alloy UREA Modified can be welded with most of the welding processes : TIG, Plasma, MIG welding, as well as SMAW, SAW or FCAW processes.
The alloy is sensitive to hot cracking phenomenon due to its fully austenitic microstructure.
Weld should be performed in order to obtain extra-low ferrite contents, no carbide or nitrides precipitations, low silicon contents as well as no intermetallic phases precipitations.
Higher manganese content products should be considered.
Use basic coated electrodes or fluxes in order to decrease the hot cracking susceptibility. The heat input should be limited to 1,5 kJ/mm and interpass temperature kept below 150C (302F).
Typical corrosion test results in Huey test solution - ASTM A262-C are as follow :
maxi weight loss 3.3 m/48h - 0,54 g/m h with selective attack lower than 200 m.
Q1: Do you accept the trial order ?
A1: Yes,if we have the exactly size in stock.we can delivery even 1 piece/meter .
Q2: Can I have free sample before making orders?
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