BS 5770-2:1981

Foreword
Cooperating organizations
Specification
1 Scope
2 References
3 Definitions
4 Designation system
5 Form of supply
6 Information to be supplied by the purchaser
7 Steelmaking process
8 Chemical composition
9 Mechanical properties
10 Response to heat treatment
11 Edge conditions
12 Surface finish
13 Dimensional tolerances
14 Freedom from defects
15 Decarburization
16 Non-metallic inclusions
17 Number of tests
18 Hardness test
19 Bend test
20 Retests
21 Test certificates
22 Inspection
23 Packaging and identification
Tables
1 Chemical composition of carbon steels
2 Chemical composition of alloy steel
3 Permitted variations of product analysis from
    specified range of cast analysis for carbon steels:
    grades 50, 60, 70, 80 and 95
4 Permitted variations of product analysis from
    specified range of cast analysis for alloy steel:
    grade 735M50
5 Hardness values
6 Bend test requirements in the annealed condition and
    the annealed and skin passed condition
7 Response to heat treatment
8 Tolerances on thickness
9 Tolerances on width in the mill edge (Es) and in the
    rolled round edge (E4) conditions
10 Tolerances on width in the sheared or slit edge
    condition (E3); also in the dressed edge condition
    (E1), where available
11 Tolerances on length of cut lengths
12 Maximum edge camber
13 Maximum deviations from flatness of cut lengths
Figures
1 Edge camber
2 Flatness of strip
3 Bend test A
4 Bend test B

Defines the requisites for cold rolled carbon and low alloy steel strip for the manufacture of springs. Relates to material from 0.1 mm to 5 mm in thickness and from 3 mm to 450 mm in width and material supplied in the annealed, annealed and skin passed or the temper rolled conditions, having one of six edge conditions and any one of two surface finishes. Includes sections on definitions, designation system, steelmaking process, chemical composition, mechanical properties, response to heat treatment, edge conditions, surface finish, dimensional tolerances, freedom from defects, decarburization, non-metallic inclusions, number of tests, hardness test, bend test, retests, test certificates, inspection, packaging and identification.