Can I use IS 407 copper for electrical busbars?

No, IS 407 is for general purposes. For electrical purposes requiring specific conductivity, use IS 1897.

What are the common tempers specified in this code?

The common tempers are O (Annealed), HB (Half-Hard), and HD (Hard).

What base grades of copper does this specification apply to?

It typically applies to DHP (Deoxidized High Phosphorus), DPA (Deoxidized Phosphorus Arsenical), and ETP (Electrolytic Tough Pitch) grades conforming to IS 191.

IS 407

: 1996

Copper Sheet and Strip for General Purposes - Specification

CurrentSpecializedSpecificationMaterials Science · Aluminium and Non-Ferrous Metals

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This standard specifies the requirements for copper sheets and strips used for general engineering, architectural, and structural purposes. It establishes guidelines for chemical composition, mechanical properties, and dimensional tolerances across various tempers like annealed, half-hard, and hard.

Covers the requirements for copper sheet and strip intended for general purposes.

Quick Reference Values

minimum copper purity99.90% (for specific IS 191 grades)

tensile strength annealed O200 to 250 MPa

tensile strength half hard HB240 to 300 MPa

tensile strength hard HD290 MPa Min

elongation annealedMin 35% (depending on thickness)

hardness annealed HV60 Max

Practical Notes

Do not use this standard for high-conductivity electrical applications; refer to IS 1897 or IS 613 for electrical grade copper.

Always specify the required 'Temper' (e.g., Annealed, Half-Hard, Hard) in the purchase order, as it dictates the formability and mechanical strength.

When severe bending or deep drawing is required, the Annealed (O) temper should be specified.