{"id":3661,"date":"2026-09-16T11:16:04","date_gmt":"2026-09-16T08:16:04","guid":{"rendered":"https:\/\/www.defencemetal.com\/index.php\/en\/aisi-410\/"},"modified":"2026-09-25T21:15:32","modified_gmt":"2026-09-25T18:15:32","slug":"aisi-410","status":"publish","type":"page","link":"https:\/\/www.defencemetal.com\/index.php\/en\/aisi-410\/","title":{"rendered":"AISI 410 \/ (1.4006)"},"content":{"rendered":"

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AISI 410 \/ (1.4006) \/ UNS S41000 \/ AMS 5504 \/ AMS 5505<\/h1>\n
DEFENCE METAL<\/span><\/p>\n
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AISI 410<\/div>\n
UNS S41000 \u00b7 W.Nr. 1.4006 \u00b7 X12Cr13 \u00b7 11.5-13.5% Cr – 0.08-0.15% C – Ni 0.75% max – Mn 1.00% max – Si 1.00% max – P 0.040% max – S 0.030% max – balance Fe. This is a MARTENSITIC stainless steel: it transforms to martensite on austenitising and quenching, and is then TEMPERED. It does NOT precipitation harden; there is NO H900 \/ H1025 type ageing step. THE CARBON CEILING IS 0.15%, and that ceiling is the single limit that separates 410 from the 420 family: the maximum attainable hardness is set directly by it. The carbon floor changes with the specification: ASTM A240 and A276 set a 0.08% floor, ASTM F899 sets 0.09%, while the Carpenter type analysis quotes only a 0.15% maximum with no floor.<\/div>\n
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Not to be confused with<\/div>\n

AISI 420<\/a>AISI 405<\/a>AISI 415<\/a>AISI 416<\/a>AISI 431<\/a><\/div>\n<\/div>\n

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For what<\/div>\n
Bought for parts that are hardened by heat treatment and need moderate strength, wear resistance and corrosion resistance in mild environments at the same time: valve bodies and stems, pump shafts, fasteners, turbine blades, shafts, bushings, die parts, and furnace or boiler internals where\u2026<\/div>\n<\/div>\n
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Forms<\/div>\n
Round bar, flat bar, plate, sheet, pipe, forging. All forms are supplied to order.<\/div>\n<\/div>\n
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Standards<\/div>\n
AMS (verified, plain S41000 \/ 12.5Cr): 5613 (bars, wire, forgings, forging and ring stock, mechanical tubing, rings; annealed) \u00b7 5504 (sheet, strip, plate; annealed) \u00b7 5591 (seamless tubing; annealed). ASTM: A276 \/ SA-276 (bars and shapes; Conditions A, T and H) \u00b7 A240 \/ SA-240 (plate, sheet, strip) \u00b7 A479 \/ SA-479 (bars for boilers and pressure vessels) \u00b7 A484 (general requirements) \u00b7 A473 (forgings) \u00b7 A314 (billets and bars for forging) \u00b7 A580 (wire) \u00b7 A493 (cold heading wire) \u00b7 F899 (surgical instruments). EN: 1.4006 \u00b7 10088-2 (flat products) \u00b7 10088-3 (bars) \u00b7 10250-4 (open die forgings) \u00b7 EN ISO 7153-1 (surgical instruments). Sour service: NACE MR0175 \/ ISO 15156 and NACE MR0103.
410 DOES have AMS coverage, but of the eight AMS numbers commonly quoted under the 410 name only THREE are plain S41000. Verified from SAE title records: AMS 5613 ‘12.5Cr (SAE 51410)’, AMS 5504 ‘12.5Cr (410)’ and AMS 5591 ‘12.5Cr (410)’ are plain 410.<\/span><\/div>\n<\/div>\n
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Advantage<\/div>\n
Of the four grades this is the most weldable and the toughest, because its carbon is capped at 0.15%. In numbers: for 410, ASTM A276 GUARANTEES BY SPECIFICATION a minimum of 690 MPa tensile \/ 550 MPa yield with 15% elongation in Condition T (tempered), and a minimum of 830 MPa tensile \/ 620 MPa\u2026<\/div>\n<\/div>\n
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Welding<\/div>\n
PREHEAT IS MANDATORY, not optional. A preheat of at least 177-204 \u00b0C (350-400 \u00b0F) is required by Carpenter and Rolled Alloys; Hobart gives 204-316 \u00b0C (400-600 \u00b0F) as the range commonly specified for martensitic stainless steels.<\/div>\n<\/div>\n
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Limits<\/div>\n
1) FORBIDDEN TEMPERING BAND: do not temper in the 400-580 \u00b0C band. In this band impact toughness drops and corrosion resistance falls. Sources differ at the ends of the band and each is named: Carpenter 399-566 \u00b0C (750-1050 \u00b0F), Rolled Alloys 750-1050 \u00b0F, West Yorkshire Steel 400-580 \u00b0C, AZoM 400-580 \u00b0C and also 425-600 \u00b0C, The World\u2026<\/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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