bedra10100

Oxygen-Free Electronic Copper

It exhibits excellent thermal conductivity, corrosion resistance, and machinability. It readily withstands processes such as stretching, piercing, extrusion, winding, deep drawing, and hot forging. Under normal conditions, it is free from hydrogen embrittlement and can be processed in reducing atmospheres; however, it is unsuitable for use or processing in high-temperature oxidizing environments.

Typical applications:

It is mainly used in the electrical industry for applications such as busbars in power installations, rotor bars in induction motors, EV connectors, EV contacts and relays, vacuum tubes and solid-state devices, and glass-to-metal or ceramic-to-metal seals.

Standardization and composition

Material Designation
UNS	C10100
EN	Cu-OFE (CW009A)
JIS	C1011
GB	TU00
Cu	≥ 99.99%
p	≤ 0.0003%
Ag	≤ 0.0025%
Bi	≤ 0.0001%
Sb	≤ 0.0004%
As	≤ 0.0005%
Fe	≤ 0.0010%
Ni	≤ 0.0010%
Pb	≤ 0.0005%
Sn	≤ 0.0002%
S	≤ 0.0015%
Zn	≤ 0.0001%
O	≤ 0.0005%
Cd	≤ 0.0001%
Te	≤ 0.0005%
Se	≤ 0.0003%
Mn	≤ 0.0005%

Physical properties①

Density (g/cm³)	8.94
Metling point (℃)	1083
Electrical conductivity (%IACS)	≥ 101
Thermal conductivity ( W/m·K)	391
Coefficient of thermal expansion② (10-6/K)	17
Modulus of elasticity (GPa)	117

Note①：The testing temperature is 20℃.

Note②：The testing temperature range is 20℃ to 300℃.

Fabrication Properties

Capacity for being cold worked	Excellent
Capacity for being hot formed	Excellent
Brazing	Excellent
Spot weld	Not recommended
Forgeability rating③	65%
Machinability rating④	20%

Note③：C37700 = 100%

Note④：C36000 = 100%

Mechanical Properties of Rods ⑤

Temper	Diameter(mm)	Tensile Strength(MPa min.)	Yield Strength(MPa min.)	Elongation(A% min.)	Hardness(HBW)
H04	3.0≤Φ＜10	290	/	8.0	≥80
H04	10≤φ≤45	270	/	8.0	≥80
H04	45＜φ≤70	230	/	15	≥60
O60	10≤φ≤70	195	/	35	/

Note⑤：bedra technical standard

Mechanical Properties of Bars

Temper	Thickness(a)(mm)	Width(b)(mm)	Tensile Strength(MPa min.)	Yield Strength(MPa min.)	Elongation(A% min.)	Hardness(HV min.)
H04	1.0≤a≤10	5.0≤b≤120	300	260	8	90
H04	10＜a≤20	10＜b≤160	280	240	10	90
H04	20＜a≤40	20＜b≤160	260	220	12	80
H02⑥	1.0≤a≤10	5.0≤b≤200	220	180	10	70
H02⑥	10＜a≤40	10＜b≤200	200	160	12	70
O60	1.0≤a≤40	5.0≤b≤250	200	max.120	35	35

Note⑥：bedra technical standard

Dimension Tolerance and Delivery Form

			Straight bar	Coil wire
Diameter (mm)	Tolerance⑦ (mm)	Ovality (mm max.)	Length (mm. max.)	Straightness (mm/m max.)
3.0 ≤ Φ 6.0	0.04	0.02	2500	0.5
6.0 ≤ Φ 10	0.06	0.03	3600	0.5
10 ≤ Φ 18	0.08	0.04	3600	0.5
18 ≤ Φ 25	0.10	0.05	4000	1.0
25≤Φ＜35	0.15	0.075	4000	1.0
35≤Φ＜50	0.20	0.10	4000	1.5
50≤Φ＜65	0.30	0.15	4000	1.5
65≤Φ＜70	0.40	0.20	4000	1.5

Note⑦:The tolerances listed in the table are specified as all plus or all minus. When tolerances are specified as plus and minus (±), half the values given.

Tolerance & Delivery Form for Bars

Width (b)(mm)	Width Tolerance ⑧(mm)	Tolerance on Nominal Thickness (a) for Range of Thickness ⑧
		a ≤ 2.8	2.8 a ≤ 4.75	4.75 a ≤ 12.5	a > 25
b ≤ 25	0.06	0.06	0.10	0.14	0.30
25 b ≤ 35.5	0.10	0.06	0.10	0.14	0.30
35.5 b ≤ 100	0.14	/	0.16	0.18	0.30
100 b ≤ 200	0.6%×b	/	/	0.24	0.30
b＞200	0.6%×b	/	/	0.60	/

Note⑧: The tolerances listed in the table are specified as all plus or all minus. When tolerances are specified as plus and minus(±), half the values given.