BS 7612:1993
Current
The latest, up-to-date edition.
Specification for non-circular steel wire for mechanical springs
Hardcopy , PDF
English
15-02-1993
Committees responsible
Foreword
Specification
1. Scope
2. References
3. Definitions
4. Information and requirements to be agreed and
to be documented
5. Manufacture
6. Dimensions and tolerances
7. Bend requirements
8. Hardness requirements
9. Freedom from defects in finished wire
10. Mechanical testing
11. Examination for defects
12. Retests
13. Packing and identification
Annex
A. (normative) Product analysis and permitted
variations
Tables
1. Quality codes and wire applications
2. Chemical compositions and ranges (cast analysis)
3. Condition of finished wire
4. Helix set test
5. Edge bow tolerances
6. Tolerances on characteristic dimensions
7. Tolerances on length of straight lengths
8. Surface defect limits
9. Decarburization limits for carbon and low alloy
steel grades
10. Material densities
11. Minimum surface hardness requirements
A.1 Permitted variation of product analysis from
specified range
Figures
1. Cross sections of typical non-circular wire shapes
indicating characteristic dimensions
2. Edge profiles
3. Coil curvature
4. Edge bow
5. Bed test
6. Final position of wire after the bend test where
b > t
List of references
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