Stainless Steel AM 355 (AMS 5547 / AMS 5743)

Technical Data Sheet


Chemical Composition Limits
Weight% C P Si Ni N Mn S Cr Mo Fe
AM 355 0.10 - 0.15 0.040 max 0.50 max 4 -5 0.07 - 0.13 0.50-1.25 0.030 max 15-16 2.5-3.25 Bal

AM 355 is a chromium nickel molybdenum stainless steel. AM 355 is a heat treatable austentic/ martensitic alloy (depending on the heat treatment). The properties of AM355 are that of strength of a heat treatable martensitic grades with the corrosion resistance of some of the chromium nickel austenitic grades.  AM 355 is used for blades, knives, industrial cutters, discs, rotors, shafts and in similar parts where high strength is required at intermediate elevated temperatures.

Typical Mechanical Properties


Alloy Test Temp Specimen Orientation Yield Strength 0.02% offset MPa Yield Strength 0.2% offset MPa Ultimate Tensile Strength MPa
Elongation in 2"(%) Reduction of Area % Rockwell C Hardness
AM 355 Bar 850°F L 979 1255 1489 19 38 48
AM 355 Bar 850°F T 1020 1276 1517 12 21  
AM 355 Bar 1000°F L 1014 1179 1276 19 57 40
AM 355 Bar 1000°F T 1020 1165 1276 15 40  

AM 355 is available as Bar (Round), Sheet, Plate, Strip, Forgings, Wire. For all other stock availability contact Sales.

AMS 5547 Sheet / Strip
AMS 5549 Plate
AMS 5743 Bars / Forgings
AMS 5744 Bars / Forgings
ASTM A484 / ASME SA484
ASTM A564 Type 634
AISI 634
UNS S35500

At Aircraft Materials all stock items can be shipped out within 24 hours, usually within the same day. Even cutting orders for bar or sheet can be processed and dispatched the same day, and for time-critical situations such as AOGs, we have a dedicated AOG service desk ready to help (

Thanks to our global logistics network we can source from anywhere in the world in just a few days. We use a range of transport partners to enable us to ship overnight within the U.K. and Europe and provide fast shipping solutions to the rest of the world. If your requirement is urgent we can offer a priority shipping service, but also if time is not so critical we can offer more cost-effective options to ensure you get the best value for money. To find out more about our services click here.

Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.

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