{"id":3617,"date":"2026-09-16T11:08:02","date_gmt":"2026-09-16T08:08:02","guid":{"rendered":"https:\/\/www.defencemetal.com\/index.php\/en\/15-5ph\/"},"modified":"2026-09-25T16:29:46","modified_gmt":"2026-09-25T13:29:46","slug":"15-5ph","status":"publish","type":"page","link":"https:\/\/www.defencemetal.com\/index.php\/en\/15-5ph\/","title":{"rendered":"15-5Ph \/ 1.4545"},"content":{"rendered":"

<\/p>\n

15-5Ph \/ 1.4545 \/ UNS S15500 \/ AMS 5659<\/h1>\n
DEFENCE METAL<\/span><\/p>\n
\n
15-5 PH<\/div>\n
UNS S15500 \u00b7 W.Nr. 1.4545 \u00b7 ASTM XM-12 \u00b7 X5CrNiCu15-5 (X5CrNiCuNb15-5 in some sources) \u00b7 14.00-15.50% Cr \u2013 3.50-5.50% Ni \u2013 2.50-4.50% Cu \u2013 0.15-0.45% Nb+Ta \u2013 C \u2264 0.07% \u2013 Mn \u2264 1.00% \u2013 Si \u2264 1.00% \u2013 P \u2264 0.040% \u2013 S \u2264 0.030%<\/div>\n
\n
Not to be confused with<\/div>\n

17-4Ph<\/a><\/div>\n<\/div>\n

\n
\n
For what<\/div>\n
Martensitic precipitation-hardening stainless steel; the delta-ferrite-controlled derivative of 17-4 PH. The part is machined in the solution-treated state (Condition A), then brought to the required strength by a single aging cycle between 482 and 621 \u00b0C.<\/div>\n<\/div>\n
\n
Forms<\/div>\n
Round bar \u00b7 Flat bar \u00b7 Plate \u00b7 Sheet \u00b7 Pipe \u00b7 Forging<\/div>\n<\/div>\n
\n
Standards<\/div>\n
AMS 5659<\/b> (bars, wire, forgings, rings, extrusions \u2014 consumable electrode remelted) \u00b7 AMS 5862<\/b> (sheet, strip, plate \u2014 consumable electrode remelted) \u00b7 AMS 5658<\/b> (bars, forgings, rings) \u00b7 AMS 5826<\/b> (welding wire) \u00b7 ASTM A564 \/ ASME SA-564 Grade XM-12 (bars, wire, shapes) \u00b7 ASTM A693 \/ ASME SA-693 Grade XM-12 (plate, sheet, strip) \u00b7 ASTM A705 \/ ASME SA-705 Grade XM-12 (forgings) \u00b7 W.Nr. 1.4545
The SAE titles of AMS 5659 and AMS 5862 both carry the phrase “Consumable Electrode Remelted”: both mandate consumable-electrode remelting (VAR = Type 1, ESR = Type 2). AMS 5658 is the air-melted bar\/forging\/ring specification;<\/span><\/div>\n<\/div>\n
\n
Advantage<\/div>\n
Delta ferrite is suppressed. Relative to 17-4 PH the chromium band is lowered (14.00-15.50% vs 15.00-17.50%) and the nickel band raised (3.50-5.50% vs 3.00-5.00%). That shift increases the austenite-forming balance and prevents delta ferrite from being retained in the structure;<\/div>\n<\/div>\n
\n
Welding<\/div>\n
Filler metal: the matching filler is AMS 5826<\/b> welding wire (15Cr \u2013 5.1Ni \u2013 0.30Cb \u2013 3.2Cu). Where matching filler is unavailable, AWS A5.9 ER630 (wire) \/ AWS A5.4 E630 (covered electrode) is used; that filler is 17-4 PH chemistry.<\/div>\n<\/div>\n
\n
Limits<\/div>\n
The service temperature ceiling at which strength is retained is approximately 316 \u00b0C (600 \u00b0F); ATI, AK Steel, Rolled Alloys and B\u00d6HLER all give the same limit. Carpenter’s 593 \u00b0C figure is for OXIDATION resistance, not a strength limit \u2014 the two must not be confused.<\/div>\n<\/div>\n
REQUEST A QUOTE<\/a>All precipitation hardening 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

<\/p>\n