Chemical and Mechanical Properties of British Standard Aerospace S500 Sheet Grades

Chemical and mechanical properties of British Standard Aerospace S500 sheet grades
Specified chemical compositions, tensile strength and hardness ranges for aerospace standard grades such as
S524, (321 type), S525, (347 type), S526, (321 type), S527, (321 type), S528, S529, S530, S531, S532,
(520S DEF STAN 95-15/1 STA 60 type), S533, (520S DEF STAN 95-15/1 STA 60 type), and S536, (304 type),
S537 and S538 are listed.

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Status; ‘C’ represents Current, ‘W’ represents Withdrawn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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