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Aircraft Stainless Steel BS S145 / 3S145 (FV 520)


Technical Data Sheet

 

Chemical Composition Limits
Weight% C Si Mn P + S max Cr Cu Mo Nb Ni
S145 0.07 0.6 1.0 P 0.035
S 0.025
13.2-14.7 1.20-2.0 1.20-2.0 0.10-0.40 5.0-5.80

S145 is a British aerospace grade, precipitation hardenable stainless steel which combines high mechanical strength with moderate corrosion resistance. It is widely used for mechanical components in aerospace and defense applications as well as other high-tech mechanical applications. It is chemically identical to BS S143 and BS S145 and is supplied as bright bar, usually in one of two heat treatments: Solution Treated, designated S145D, or Solution Treatedand Precipitated, designated S145H. The heat treatment is as follows:

Solution Treatment : 850-950°C/1hr plus air cool (S145D)
Precipitation: 440-460°C / 30mins plus air cool (S145D)

Typical Mechanical Properties

Grade Condition Tensile Strength N/mm² Yield Strength N/mm² Elongation (%) Hardness (HB) Ruling Section
S145D Solution Treated S145D - - - 363 max -
S145H Solution Treated & Precipitated S145H 1270-1470 1030 15 352-401 <75mm
S145H Solution Treated & Precipitated S145H 1270-1470 1030 10 352-401 >75mm

Availability
Alloy S145 is available in Bars and Forgings. For all stock availability contact Sales.

Specifications

BS S143
BS S144
FV520B
Def Stan 95-14

Services
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 (aog@aircraftmaterials.com).

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.

Disclaimer
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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