BS 5770-3:1981

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 Edge conditions
11 Surface finish
12 Dimensional tolerances
13 Freedom from defects
14 Decarburization
15 Non-metallic inclusions
16 Number of tests
17 Hardness test
18 Bend test
19 Retests
20 Test certificates
21 Inspection
22 Packaging and identification
Tables
1 Chemical composition
2 Permitted variations of product analysis from
    specified range of cast analysis
3 Hardness values
4 Bend test requirements
5 Tolerances on thickness
6 Tolerances on width in the rolled round edge
    condition (E4)
7 Tolerances on width in the sheared or slit edge
    condition (E3) and dressed edge condition (E1)
8 Tolerances on length of cut lengths
9 Maximum edge camber
Figures
1 Edge camber
2 Bend test

Defines the requisites for pre-hardened and tempered carbon steel strip for the manufacture of springs. Relates to material from 0.1 mm to 2.65 mm inclusive in thickness and from 2 mm to 450 mm inclusive in width, provided in various levels of hardness, having any one of five edge conditions and any one of four surface finishes. Includes sections on definitions, designation system, steelmaking process, chemical composition, mechanical properties, 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.