Chemical and mechanical properties of British Standard Aerospace S500 sheet grades
Introduction
British Standard Aerospace products for sheet and strip have their own individual standards and are not summarised in a single Standard. The table shows most of the grade numbers that are commonly encountered.
BS ‘500’ sheet and strip grades
Composition (Max, unless stated).
S, 0.025% and P, 0.035% maxima apply to all grades shown , except grade S538 where the P maximum is 0.030%
Tensile Strength, (Min, unless stated)
Hardness, HB, (Max, unless stated)
Status; ‘C’ represents Current, ‘W’ represents Withdrawn
Treatments: CR = Cold Rolled ; CR+T = Cold Rolled and Tempered ; FHT = Final Heat Treatment ; S = Softened
For heat treatable grades, only the Finally Heat Treated mechanical strength values are shown.
| Standard |
Status |
C |
Si |
Mn |
Cr |
Mo |
Ni |
Others |
Treatment |
Proof (MPa) |
UTS (MPa) |
El.% |
Hard. (HB) |
| S524(1969) |
C |
0.08 |
0.2/1.0 |
0.5/2.0 |
17.0/19.0 |
1.0 |
9.0/11.0 |
Ti 5xC/0.70 |
CR or CR+T |
640 |
800/1100 |
15 |
– |
| S525(1969) |
C |
0.08 |
0.2/1.0 |
0.5/2.0 |
17.0/19.0 |
1.0 |
9.0/11.0 |
Nb 10xC/1.0 |
CR or CR+T |
640 |
800/1100 |
15 |
– |
| S526(1969) |
C |
0.08 |
0.2/1.0 |
0.5/2.0 |
17.0/19.0 |
1.0 |
9.0/11.0 |
Ti 5xC/0.70 |
S |
210 |
540 |
40 |
179 |
| S527(1969) |
C |
0.08 |
0.2/1.0 |
0.5/2.0 |
17.0/19.0 |
1.0 |
9.0/11.0 |
Nb 10xC/1.0 |
S |
210 |
540 |
40 |
179 |
| S528(1970) |
C |
0.12 |
0.2/1.0 |
0.5/2.0 |
22.0/25.0 |
– |
13.0/16.0 |
Ti 5xC/0.90 |
S |
210 |
540 |
30 |
179 |
| S529(1970) |
W |
0.12 |
0.2/1.0 |
0.5/2.0 |
22.0/25.0 |
– |
13.0/16.0 |
Nb 10xC/1.4 |
S |
210 |
540 |
30 |
179 |
| S530(1970) |
C |
0.12 |
0.2/1.0 |
0.5/2.0 |
23.0/26.0 |
– |
16.0/19.0 |
Nb 5xC/0.9 |
S |
210 |
540 |
30 |
179 |
| S531(1970) |
W |
0.12 |
0.2/1.0 |
0.5/2.0 |
23.0/26.0 |
– |
16.0/19.0 |
Nb 10xC/1.4 |
S |
210 |
540 |
30 |
179 |
| S532(1969) |
C |
0.04/0.07 |
0.60 |
0.80/1.80 |
15.3/16.3 |
1.2/2.0 |
5.0/5.8 |
Cu 1.4/2.1 Ti 0.05/0.15 |
FHT |
800 |
980/1180 |
8 |
293/363 |
| S533(1969) |
C |
0.04/0.07 |
0.60 |
0.80/1.80 |
15.3/16.3 |
1.2/2.0 |
5.0/5.8 |
Cu 1.4/2.1 Ti 0.05/0.15 |
FHT |
980 |
1180/1370 |
6 |
375/429 |
| S536(1970) |
C |
0.03 |
0.2/1.0 |
0.5/2.0 |
17.5/19.0 |
– |
9.0/12.0 |
– |
S |
190 |
500/700 |
40 |
170 |
| S537(1970) |
C |
0.03 |
0.2/1.0 |
0.5/2.0 |
16.5/18.5 |
2.25/3.0 |
11.0/14.0 |
– |
S |
190 |
500/700 |
40 |
170 |
| S538(1975) |
C |
0.08/0.13 |
0.35 |
0.5/0.9 |
11.0/12.5 |
1.5/2.0 |
2.0/3.0 |
N 0.02/0.04 V 0.25/0.40 |
FHT |
760 |
930/1130 |
9 |
320/380 HV |
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