Aircraft Stainless Steel S159 / S159D (Jethete M152)

Technical Data Sheet

BS S159 is the British aerospace standard for stainless steel alloy Jethete M152. S159 is a creep and corrosion resistant, hardened and tempered steel with a usual upper temperature limit of 560°C. It combines very good toughness and creep rupture properties making it an excellent alloy for use in highly stressed turbine blades, discs, screws, bolts and rings. S159 is usually supplied in the finally heat treated condition, although is available softened at larger diameter, and has a limiting ruling section of 50mm (2").

The heat treatment for BS S191 is as follows:
Softening: 680-700°C for 2 hours min followed by air cool - Designated BS S159A
Harden: 1050°C (+/-10) for 30 minutes min followed by air cool
Temper: 560-590°C for 3 hours min followed by air cool - Designated BS S159D
Stress Relieve: Can be performed on hardened and tempered bars if a cold rolling operation has taken place, by holding at 30°C lower than the tempering temperature.

Chemical Composition Limits
Weight% C Si Mn P+S max Cr Mo Ni N V
S159 0.08-0.13 0.35 max 0.50-0.90 P 0.030
S 0.025
11-12.5 1.50-2.0 2-3 0.02-0.04 0.25-0.40

Typical Mechanical Properties

Grade Treatment Tensile Strength Mpa Yield Strength Mpa Elongation % Hardness HB Ruling Section
S159A Solution - - - 311 max -
S159D Finally Heat Treated 1100-1300 900 8 321-388 50mm

Alloy BS S159D is available in Round Bar, for all stock availability contact Sales.

Related Specifications
Jethete M152
BS S151
MSRR 6503
MSRR 6504 - Jethete M152 sheet
MSRR 6514 - Jethete M152 sheet
AMS 5719
DTD 5066
WS 1.4933
WS 1.4938
WS 1.4939
UNS S64152

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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.