RWMA GROUP A COPPER ALLOYS:


TW-2: RWMA GROUP A CLASS 2 COPPER. TW-2 is a high strength, high conductivity copper base alloy. Available in drawn bar & rod, forgings, castings, strip, and plate. TW-2 is used for spot welding tips, seam welding wheels, tube mill electrodes and many other applications.

Tool-Weld
Grade 		RWMA
Group A 		Condition Rockwell
Hardness 		Cond.
% I.A.C.S. 		U.T.S.
psi 		Composition Annealing Temp.
TW-2 Class 2 Wrought 80B 80 75,000 1Cr99Cu 930 F
Cast 65B 75 50,000 1Cr99Cu 930 F

TW-3: RWMA GROUP A CLASS 3 COPPER. TW-3 is a heat treatable high strength and high conductivity copper base alloy which offers the combination of greatest strength and hardness with high electrical and thermal conductivity. TW-3's hardness, high annealing temperatures and good wear resistance make it an excellent choice for welding high resistance materials such as stainless steel, nichrome, and monel. Available in drawn bar & rod, forgings, castings, strip, and plate.

Tool-Weld
Grade 		RWMA
Group A 		Condition Rockwell
Hardness 		Cond.
% I.A.C.S. 		U.T.S.
psi 		Composition Annealing Temp.
TW-3 Class 3 Wrought 95B 53 105,000 1Be2Ni97Cu 1020 F
Cast 95B 45 90,000 1Be2Ni97Cu 1020 F

TW-9: RWMA GROUP A CLASS 3 COPPER. TW-9 is a high strength, high conductivity copper base alloy with similar properties as TW-3. TW-9 uses silicon, and chrome instead of beryllium to create a beryllium free class 3 copper. In most applications TW-9 may be substituted for TW-3.

Tool-Weld
Grade 		RWMA
Group A 		Condition Rockwell
Hardness 		Cond.
% I.A.C.S. 		U.T.S.
psi 		Composition Annealing Temp.
TW-9 Class 3 Wrought 98B 50 103,000 2Ni1Si1Cr96Cu 1020 F
Cast 98B 48 90,000 2Ni1Si1Cr96Cu 1020 F

TW-4: RWMA GROUP A CLASS 4 COPPER. TW-4 is a heat treatable copper base alloy having very high hardness and strength along with lower electrical and thermal conductivity. TW-4 is used for platens, projection welding and electrical upsetting electrodes and other applications requiring great strength and hardness. Available in drawn bar & rod, forgings, castings, strip, and plate.

Tool-Weld
Grade 		RWMA
Group A 		Condition Rockwell
Hardness 		Cond.
% I.A.C.S. 		U.T.S.
psi 		Composition Annealing Temp.
TW-4 Class 4 Wrought 38C 23 108,000 2Be1Ni97Cu 710 F
Cast 38C 23 110,000 2Be1Ni97Cu 710 F