T2 Copper

What Is T2 Copper?

T2, referred to as copper. A grade of pure copper in machinery, T2 copper refers to a copper-silver alloy, in which the copper + silver element content of copper is >99.9%, and there is no requirement for phosphorus.

Pure copper strip (hard, ≥0.3mm)
T2 conductivity ≥56Ms/m,
Resistance ≤0.0178×10-6 Ω.m.
Brand number: T2
Executive standard: GB/T 2059-2017
Density: 8.9 g/cm³

Product characteristics and scope of application

Product Features

It has good electrical conductivity, thermal conductivity, corrosion resistance and processing properties, and can be welded and brazed. Contains less impurities that reduce electrical conductivity and thermal conductivity. A trace amount of oxygen has little effect on electrical conductivity, thermal conductivity and processing performance, but it is easy to cause “hydrogen disease”. It is not suitable for processing (annealing, annealing, Welding, etc.) and use.

Product use occasion

Used as electrical, thermal, and corrosion resistant equipment. Such as wires, cables, conductive screws, detonators for blasting, evaporators for chemical industry, storage and various pipelines.

Product mechanical properties

Sample size: thickness ≥ 0.2
Tensile strength σb(Mpa): ≥195
Vickers hardness: ≤70HV

Mechanical behavior

Tensile mechanical properties of strip at room temperature

Casting method of product delivery status

Delivery status: hard (Y)

Product heat treatment specification and metallographic structure
Heat treatment specification: hot working temperature 900～1050℃; annealing temperature 500～700℃; cold work hardened copper recrystallization starting temperature 200～300℃.

Product chemical composition (mass fraction) /%

Copper + silver CUAG (%): ≥99.90	Beryllium SB (%): ≤0.002
Tin SN (%): ≤0.002	Sulfur S (%): ≤0.005
Zinc ZN (%): ≤0.005	Arsenic AS (%): ≤0.002
Lead PB (%): ≤0.005	Bismuth BI (%): ≤0.001
Nickel NI (%): ≤0.005	Oxygen O (%): ≤0.06
Iron FE (%): ≤0.005	Others (%): ≤0.1 (impurities)

Mechanical properties:

The heat treatment state of the material is different, and the mechanical properties are also different, please refer to the following table:

Grade	Status	Thickness/mm	Tensile Strength	Elongation（%）	Vickers Hardness HV( HV)
			（MPa）
T2 、T3	M (soft)	≥0.2	≥195	≥30	≤70
TU1、TU2	Y4 (1/4 hard)		215~275	≥25	60~90
TP1、TP2	Y2 (semi-hard)		245~345	≥8	80~110
	Y (hard)		295~380	≥3	90~120
	T (extra hard)		≥350	—	≥110