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Aircraft Steel BS S535
Technical Data Sheet
BS S535 is an alloy steel, similar to U.S. specification 4130 (AMS 6350). It is supplied in sheet form in the softened condition, usually dual certified to BS S534 for subsequent heat treatment, depending on the properties required. Heat treatment is as follows:
S534 Harden 870°C + Oil quench / Temper 540°C (2hrs) + air cool
S535 Harden 870°C + Oil quench / Temper 420°C (2hrs) + air cool
| Chemical Composition Limits | |||||||
| Weight% | C | Si | Mn | P + S max | Cr | Mo | Ni |
| S535 | 0.22-0.29 | 0.15-0.35 | 0.50-0.80 | P 0.02 S 0.025 | 0.90-1.20 | 0.15-0.25 | 0.3 |
Typical Mechanical Properties
| Grade | Condition | Tensile Strength N/mm² | Yield Strength N/mm² | Elongation (%) | Hardness (HB) | Ruling Section |
| S535 | Hardened & Tempered | 1150-1300 | 1000 | 4 | 341-388 | <1.5mm |
| S535 | Hardened & Tempered | 1150-1300 | 1000 | 5 | 1.5mm - 3.0mm | |
| S535 | Hardened & Tempered | 1150-1300 | 1000 | 6 | >3.0mm | |
| S535 | Softened | 174 max |
Availability
Alloy S535 for all stock availability contact Sales.
Specifications
AISI 4130
AMS 6370-4130 Sheet/ Strip/Plate
WS 1.7214
25CD45
