{"id":3665,"date":"2026-09-16T11:16:14","date_gmt":"2026-09-16T08:16:14","guid":{"rendered":"https:\/\/www.defencemetal.com\/index.php\/en\/aisi-316\/"},"modified":"2026-09-25T16:30:27","modified_gmt":"2026-09-25T13:30:27","slug":"aisi-316","status":"publish","type":"page","link":"https:\/\/www.defencemetal.com\/index.php\/en\/aisi-316\/","title":{"rendered":"AISI 316 \/ (1.4401)"},"content":{"rendered":"

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AISI 316 \/ (1.4401) \/ UNS S31600 \/ AMS 5648 \/ AMS 5524 \/ AMS 5573<\/h1>\n
DEFENCE METAL<\/span><\/p>\n
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AISI 316<\/div>\n
UNS S31600 \u00b7 W.Nr. 1.4401 \u00b7 X5CrNiMo17-12-2 \u00b7 16.0-18.0% Cr \u2013 10.0-14.0% Ni \u2013 2.00-3.00% Mo \u2013 C \u2264 0.08% (ASTM A240, A276, A479, A312, A182) \u2013 balance Fe. The EN 10088 band for 1.4401 is slightly narrower: C \u2264 0.07%, 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

AISI 316L<\/a>AISI 304<\/a><\/div>\n<\/div>\n

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For what<\/div>\n
Bought where 304 is not enough in moderate chloride-bearing environments: chemical and food plant equipment, process piping, structural members in coastal atmospheres, heat exchangers. The molybdenum addition raises resistance to pitting and crevice corrosion above that of 304.<\/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 5524<\/b> (sheet, strip, plate) \u00b7 AMS 5648<\/b> (bars, wire, forgings, mechanical tubing, rings and stock for forgings and rings) \u00b7 AMS 5573<\/b> (seamless tubing) \u00b7 AMS 5690<\/b> (wire). ASTM: A240 \/ SA-240 (plate, sheet, strip) \u00b7 A276 \/ SA-276 and A479 \/ SA-479 (bar and shapes) \u00b7 A312 \/ SA-312 (pipe, TP316) \u00b7 A213 \/ SA-213 and A249 (tube, TP316) \u00b7 A182 \/ SA-182 (forged flanges and fittings, F316) \u00b7 A403 (fittings, WP316) \u00b7 A580 (wire) \u00b7 A484 (general requirements). EN: 1.4401 \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 up: in sheet, strip and plate AMS 5524 belongs to 316 and AMS 5507 to 316L; in bar, wire and forgings AMS 5648 belongs to 316 and AMS 5653 to 316L.<\/span><\/div>\n<\/div>\n
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Advantage<\/div>\n
A yield minimum 35 MPa higher than 316L: 205 MPa against 170 MPa in ASTM A240, and 515 MPa against 485 MPa in tensile. In the same specification the elongation minimum (40%) and the hardness ceiling (217 HBW \/ 95 HRB) are identical for both grades, so this gain is not paid for in ductility or\u2026<\/div>\n<\/div>\n
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Welding<\/div>\n
Filler metal: AWS E316 \/ ER316 and 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: it cracks under tensile stress in a chloride-bearing environment. worldstainless, Aalco, AZoM and thyssenkrupp give the threshold as about 60 \u00b0C; ASSDA and Outokumpu say about 50 \u00b0C and ATI about 49 \u00b0C (120 \u00b0F) \u2014 NO SINGLE NUMBER IS GIVEN; the practical threshold is the 50-60 \u00b0C band.<\/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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