BS 7 S80:2002 – S80D
COMMON NAMES:
431S29 Stainless
UNS S43100
AMS 5628
FORM & USE:
S80D under the British Aerospace Standard BS 7 S80 is a material with high mechanical properties and good corrosion resistance. It is akin to 431 stainless. The material is magnetic. We stock round bar and the material is supplied in the hardened and tempered condition (S80D).
The material may be welded, except the use of forge or hammer welding not recommended. The material needs to be annealed after welding to reduce the effects of air-hardening.
SIZES STOCKED:
19.05 mm diameter – 127 mm diameter.
GENERAL:
Tolerances are in accordance with BS S100.
CONDITION:
Hardened & tempered.
MELTING:
Air melted by an electric process.
CHEMISTRY:
| C | Mn | Si | P | S | Cr | Ni | Mo | Co | Cu |
|---|---|---|---|---|---|---|---|---|---|
| 0.12 – 0.20 | < 1.00 | < 1.00 | < 0.030 | < 0.025 | 15.00 – 18.00 | 2.00 – 3.00 | < 0.30 | < 0.05 | < 0.30 |
| Nb | Sn | Ti | V | W | Fe | ||||
| < 0.05 | < 0.02 | < 0.05 | < 0.20 | < 0.05 | Balance |
HEAT TREATMENT:
Hardened and tempering cycles:
- 1000oC to 1020oC for sufficient time, then oil quenched
- 640oC to 660oC for sufficient time, then water or oil quenched
- 620oC to 640oC for sufficient time, then water or oil quenched
MATERIAL PROPERTIES:
Tensile Properties:
| Tensile Strength | Minimum Yield strength at 0.2% Offset | Minimum Elongation in 2” or 4d | Minimum Reduction of Area | Hardness | |
|---|---|---|---|---|---|
| MPa | MPa | % | % | ||
| Hardened & Tempered | 880 – 1080 | 690 | 12 | – | 255-321 HB |
A “-“ indicates no requirement for the property.
IZOD Impact test
In accordance with BS 131
< 63 mm dia – >25 ft lbs
> 63 mm dia – >15 ft lbs
Macroetch examination
Meets requirements of BS S100 SECTION 1
Non-metallic inclusions
In accordance with ASTM E45
100% Ultrasonic Test
In accordance with AMS-STD-2154 Rev C – Quality Class A
100% Surface Inspection
No reportable surface defects.
Full material traceability, with anti-counterfeit measures, is maintained at all times, and full certification is provided, including producer’s name and country where the material was melted.