Properties and Tolerance of Rod and Wire

Properties of Rod

Alloy	Temper	Symbol 1)	Diameter or Distanse of Subtense	Tensile 2)		Hardness 3)			Electrical conductivity 5) (%IACS)	Heat treatment °C × hrs
				Tensile strength N/mm2	Elongation %	Vickers Hv 4)(0.2min.)	Rockwell
							HRB	HRC
25	Age Hardenable
	O	C1720B-O	1 incl. 6 and under	410 - 590	-	90 - 190	-	-	17min.	-
			6 over 35 and under	410 - 590	-	90 - 190	45 - 85	-	17min.	-
	H	C1720B-H	1 incl. 6 and under	645 - 900	-	180 - 300	-	-	15min.	-
			6 over 35 and under	590 - 900	-	175 - 330	80 - 103	-	15min.	-
	After Age hardening
	OT	C1720B-OT	1 incl. 6 and under	1100 - 1380	-	300 - 400	-	-	22min.	315°C × 3h
			6 over 35 and under	1100 - 1380	-	300 - 400	-	34 - 40	22min.	315°C × 3h
	HT	C1720B-HT	1 incl. 6 and under	1270 - 1650	-	340 - 440	-	-	22min.	315°C × 2h
			6 over 35 and under	1210 - 1620	-	330 - 430	-	37 - 45	22min.	315°C × 3h 6)
25-K	Age Hardenable
	H	BeCuBK-H	1 incl. 6 and under	645 - 900	-	180 - 300	-	-	15min.	-
	After Age Hardening
	HT	BeCuBH-HT	1 incl. 6 and under	1270 - 1650	-	340 - 440	-	-	22min.	315°C × 2h
11	Age Hardenable
	H	BeCuB11-H	1 incl. 6 and under	490 - 635	-	130 - 190	-	-	30min.	-
	After Age Hardening
	HT	BeCuB11-HT	1 incl. 6 and under	760 - 965	-	230 - 280	-	-	50min.	450°C × 2h
10	Age Hardenable
	H	BeCuB10-H	3 incl. 6 and under	490 - 635	-	130 - 190	-	-	20min.	-
	After Age Hardening
	HT	BeCu10-HT	3 incl. 6 and under	760 - 965	-	230 - 280	-	-	48min.	480°C × 2h

1) B:Bar and Rod.
2),3) When hardness values are specified, tensile values shall be not specified
4) Vickers hardness are for design guidance only
5) Electrical conductivity are for design guidance only
6) 315°C x 2h when diameter or distance of subtense are under 19mm.

Properties of Wire

Alloy	Temper	Symbol 1)	Tensile			Electrical conductivity 2)(%IACS)	Heat treatment °C × hrs
			Diameter mm	Tensile strength N/mm2)	Elongation %
25	Age Hardenable
	O	C1720W-O	0.3min.	390 - 540	-	-	-
	1/4H	C1720W-1/4H	0.1min.	620 - 805	-	-	-
	3/4H	C1720W-3/4H	0.1min.	835 - 1070	-	-	-
	After age hardening
	OT	C1720W-OT	0.3min.	1100 - 1380	-	20min.	315°C×3h
	1/4HT	C1720W-1/4HT	0.1min.	1210 - 1450	-	20min.	315°C×2h
	3/4HT	C1720W-3/4HT	0.1min.	1300 - 1590	-	min. 20	315°C×1h

Tolerance of Rod, Wire

Rod (Machined)		Wire
Diameter	Tolerance	Diameter	Tolerance
1.0 incl. 2.5 and under	+, -0.02	0.1 incl. 0.25 and under	+, -0.005
2.5 over 3.5 and under	+, -0.02	0.25 over. 0.3 and under	+, -0.008
3.5 over 5 and under	+, -0.02	0.3 over. 0.5 and under	+, -0.010
5 over 10 and under	+, -0.03	0.5 over. 1 and under	+, -0.015
10 over 22 and under	+, -0.04	1 over 2 and under	+, -0.020
22 over 35 and under	+, -0.10	2 over 3.5 and under	+, -0.025
35 over 40 and under	+, -0.12

Bar/Plate

Physical Properties of Beryllium Copper

Items	Unit	High Strength Alloy
		BeA - 25	BeA - 165
Specific Gravity		8.26
Melting Points	°C	865 - 980
Coefficent of Thermal Expansion	(20 - 200°C)	17 × 10-6
Thermal Conductivity	cal/cm2/cm/sec/°C	0.26 - 0.31
Volume Resistivity	µΩ-cm	6.0 - 7.8
Electrical Conductivity	lACS%	22 - 29
Specific Heat	(30 - 300°C) cal/g/°C	0.1
Modulus of Elasticity	kN/mm2	127
Magnetism		none

Items	Unit	High Conductive Alloy
		BeA - 10	BeA - 11	BeA - 50
Specific Gravity		8.75	8.75	8.83
Melting Points	°C	1029 - 1070	1004 - 1070	1020 - 1110
Coefficent of Thermal Expansion	(20 - 200°C)	17.6 × 10-6	17.6 × 10-6	17.6 × 10-6
Thermal Conductivity	cal/cm2/cm/sec/°C	0.49 - 0.62	0.49 - 0.62	0.49 - 0.62
Volume Resistivity	µΩ-cm	3.1 - 3.6	2.9 - 3.4	2.9 - 3.4
Electrical Conductivity	lACS%	50 - 60	50 - 60	50 - 60
Specific Heat	(30 - 300°C) cal/g/°C	0.1	0.1	0.1
Modulus of Elasticity	kN/mm2	132	132	132
Magnetism		none	none	none

Mechanical Properties of Beryllium Copper

Alloy	Temper	T/S	0.2% Yield Strength	Elongation	Hardness
		N/mm2	N/mm2	%	HR
BeA - 25	A	410 - 590	135 - 205	35 - 60	B 45 - 85
	H	590 - 900	520 - 725	10 - 20	B 88 - 103
	AT	1100 - 1375	930 - 1205	2 - 8	C 34 - 45
	HT	1205 - 1470	1030 - 1375	2 - 5	C 37 - 45
BeA - 165	A	410 - 590	135 - 205	35 - 60	B 45 - 85
	AT	980 - 1245	865 - 1060	2 - 10	C 32 - 40
BeA - 10	A	235 - 390	135 - 205	20 - 35	B 20 - 50
	AT	685 - 835	490 - 685	10 - 25	B 92 - 105
BeA - 11	A	235 - 390	135 - 205	20 - 35	B 20 - 50
	AT	685 - 885	490 - 685	10 - 25	B 92 - 105
BeA - 50	A	235 - 390	135 - 205	20 - 35	B 20 - 50
	AT	685 - 835	490 - 685	8 - 20	B 92 - 105

A : Solution Annealed
AT : Solution Annealed + Age Hardened
H : Solution Annealed + Cold Worked
HT: Solution Annealed + Cold Worked + Age Hardened

Comperison of Mechanical Properties

Alloy	T/S	Rockwell Hardness	Elongation	Electrical Conductivity	Thermal Cond.
	N/mm2	R&C Scale	%	%IACS	cal/cm2/cm/°C
BeA - 25	1175	C38	2	25	0.25
BeA - 50	785	B96	15	55	0.45
Aluminum Bronze	735	B90	18	10	0.13
Copper-Chromium Alloy	540	B75	15	80	0.77
High Strength Brass	590	B80	15	20	0.22
Phosphor Bronze	490	B70	20	10	0.13
18-8 Stainless Steel	635	B80	55	2	0.04
Steel	490	B70	50	8	0.1