This specification covers uncoated, round, high carbon steel wire for the fabrication of mechanical springs and wire forms for general purpose use.

Classification:

Types and class: Spring wire shall be of the following types and classes, as specified (see 6.2):

Type I - Oil-tempered spring wire.

Class 1 - Wire with tensile properties shown in table II.

2 - Wire with tensile properties shown in table II.

Type II - Hard-drawn spring wire.

Class 1 - Wire with tensile properties shown in table II.

2 - Wire with tensile properties shown in table II.

Type III - Soft spring wire.

Class 1 - Spheroidize-annealed at finish size.

2 - Spheroidize-annealed and lightly drawn.

3 - Patented or equivalent thermal treatment and lightly drawn.