Aircraft Steel BS S99/ 5S99D / 5S99G (826M40)
Technical Data Sheet
|Chemical Composition Limits|
|Chemically similar British Specifications BS.970 Pt2|
|Other Chemically similar Specifications|
BS S99, along with S98 is the British aerospace equivalent of 826M40. A 2 1/2% Nickel-Chrome-Moly high carbon steel, it is available in bars and forgings. S98 is generally supplied as bright bar in either the softened condition (5S99D) or hardened and tempered (5S99G).
Typical Mechanical Properties
|Grade||Treatment||Tensile Strength Rm N/mm²||Proof Stress Rp 0.2, N/mm²||Elongation in 5.65 √Cross Sectional Area%||Hardness HB||Ruling Section|
|3S99D||Solution Annealed||-||-||-||277 max||-|
|3S99G||Hardened and Tempered||1230-1420||1080||10||363-415||6"|
Alloy S99 is available in Bar . For all stock availability contact Sales.
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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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