{"id":3663,"date":"2026-09-16T11:16:09","date_gmt":"2026-09-16T08:16:09","guid":{"rendered":"https:\/\/www.defencemetal.com\/index.php\/en\/aisi-316l\/"},"modified":"2026-09-25T16:24:34","modified_gmt":"2026-09-25T13:24:34","slug":"aisi-316l","status":"publish","type":"page","link":"https:\/\/www.defencemetal.com\/index.php\/en\/aisi-316l\/","title":{"rendered":"AISI 316L \/ (1.4404 )"},"content":{"rendered":"

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AISI 316L \/ (1.4404) \/ UNS S31603 \/ AMS 5653 \/ AMS 5507<\/h1>\n
DEFENCE METAL<\/span><\/p>\n
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AISI 316L<\/div>\n
UNS S31603 \u00b7 W.Nr. 1.4404 \u00b7 X2CrNiMo17-12-2 \u00b7 16.0-18.0% Cr \u2013 10.0-14.0% Ni \u2013 2.00-3.00% Mo \u2013 C \u2264 0.030% (ASTM A240, A276, A479, A182) or \u2264 0.035% (ASTM A312, A213) \u2013 balance Fe. The EN 10088 band for 1.4404 is: C \u2264 0.030%, Cr 16.5-18.5%, Ni 10.0-13.0%, Mo 2.0-2.5%. It is an austenitic stainless steel: NOT PRECIPITATION HARDENABLE, it cannot be hardened by heat treatment; strength is raised only by cold work.<\/div>\n
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Not to be confused with<\/div>\n

Inconel 625<\/a>Ti Grade 2<\/a>AISI 316<\/a>AISI 318<\/a>AISI 904L<\/a>Nitronic 50<\/a><\/div>\n<\/div>\n

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For what<\/div>\n
Bought for welded fabrication. Where 304L is not enough in a moderate chloride-bearing environment and where a post-weld solution anneal cannot be carried out: heavy-section welded tanks and vessels, process piping, chemical and pharmaceutical equipment, food and beverage lines.<\/div>\n<\/div>\n
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Forms<\/div>\n
Round bar \u00b7 flat bar \u00b7 plate \u00b7 sheet \u00b7 pipe and tube \u00b7 forging. All forms supplied to order.<\/div>\n<\/div>\n
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Standards<\/div>\n
AMS 5507<\/b> (sheet, strip, plate) \u00b7 AMS 5653<\/b> (bars, wire, forgings, mechanical tubing, rings). ASTM: A240 \/ SA-240 (plate, sheet, strip) \u00b7 A276 \/ SA-276 and A479 \/ SA-479 (bar and shapes) \u00b7 A312 \/ SA-312 (pipe, TP316L) \u00b7 A213 \/ SA-213 and A249 (tube, TP316L) \u00b7 A182 \/ SA-182 (forged flanges and fittings, F316L) \u00b7 A403 (fittings, WP316L) \u00b7 A580 (wire) \u00b7 A484 (general requirements). EN: 1.4404 \u00b7 10088-2 \u00b7 10088-3 \u00b7 10028-7 \u00b7 10216-5 \u00b7 10217-7 \u00b7 10222-5.
The AMS numbers are SEPARATE for 316 and 316L and must not be mixed: in sheet, strip and plate AMS 5507 belongs to 316L and AMS 5524 to 316; in bar, wire and forgings AMS 5653 belongs to 316L and AMS 5648 to 316.<\/span><\/div>\n<\/div>\n
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Advantage<\/div>\n
Intergranular corrosion resistance in the as-welded condition. The carbon ceiling is 0.030% against the 0.08% of 316, that is 2.7 times lower; over the time of a weld heat cycle chromium carbide does not precipitate in practice.<\/div>\n<\/div>\n
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Welding<\/div>\n
Filler metal: AWS E316L \/ ER316L; under AS 1554.6 AZoM states ‘316 and 316L rods or electrodes (or their high silicon equivalents)’. NO PREHEAT IS REQUIRED \u2014 the austenitic structure shows no transformation hardening. ASME Section IX P-No 8 (austenitic stainless);<\/div>\n<\/div>\n
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Limits<\/div>\n
CHLORIDE STRESS CORROSION CRACKING: the low carbon DOES NOT reduce this risk. Under tensile stress in a chloride-bearing environment it cracks above roughly 50-60 \u00b0C (worldstainless, Aalco and AZoM about 60 \u00b0C; ASSDA and Outokumpu about 50 \u00b0C; ATI about 49 \u00b0C). NO SINGLE NUMBER IS GIVEN. SEAWATER: 316L is NOT a seawater material;<\/div>\n<\/div>\n
REQUEST A QUOTE<\/a>All stainless steels →<\/a>TECHNICAL DETAILS ↓<\/span><\/div>\n
Compiled from manufacturer data sheets \u00b7 confirm against the current specification before ordering<\/div>\n<\/div>\n<\/div>\n

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