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 summarized 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Status; 'C' represents Current, 'W' represents Withdrawn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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