Hardenable Steel BS S155
Technical Data Sheet
|Chemical Composition Limits|
|Weight%||C||Si||Mn||P + S max||Cr||Mo||Ni|
BS S155 is the British aerospace equivalent of U.S. steel grade 300M (4340M / AMS 6257). It is a vacuum melted grade supplied in the normalised and tempered/softened condition to allow for final heat treatment. It has a combination of ultra high strength, good fatigue resistance and excellent transverse properties and as such finds many applications in the aerospace industry such as undercarriage components, gears and shafts.
Typical Mechanical Properties
|Grade||Condition||Tensile Strength N/mm²||Yield Strength N/mm²||Elongation (%)||Hardness (HB)||Ruling Section|
|S155||Norm & Softened||-||-||-||302||-|
|S155||Hardened & Tempered||1900-2100||1550||8||534-601||3"|
|S155||Hardened & Tempered||1900-2100||1550||5
Alloy S155 for all stock availability contact Sales.
SAE 4340M / 300M
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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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