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Beryllium Copper Products | Beryllium Copper Strip

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Features of Beryllium Copper

(5) Properties and Tolerances of High Strength Material (Alloy 25)

Properties of Strip

Alloy Temper Designation 8) Tensile test 1)
Tensile strength (N/mm2) Yield strength 0.2% offset (N/mm2) Elongation (%)
25 Age Hardenable 6) Before age hardening
O C1720P-OC1720R-O 410 - 540 - min. 35
1/4H C1720P-1/4HC1720R-1/4H 510 - 620 - min. 10
1/2H C1720P-1/2HC1720R-1/2H 590 - 695 - min. 5
H C1720P-HC1720R-H 685 - 835 - min. 2
After age hardening
OT C1720P-OTC1720R-OT 1100 - 1380 4) min. 960 min. 3
1/4HT C1720P-1/4HTC1720R-1/4HT 1180 - 1400 4) min. 1030 min. 2
1/2HT C1720P-1/2HTC1720R-1/2HT 1240 - 1440 4) min. 1100 min. 2
HT C1720P-HTC1720R-HT 1270 - 1480 4) min. 1140 min. 1
Mill Hardened 6) (Standard) OM C1720P-OMC1720R-OM 685 - 885 5) min. 480 min. 18
1/4HM C1720P-1/4HMC1720R-1/4HM 735 - 930 5) min. 550 min. 10
1/2HM C1720P-1/2HMC1720R-1/2HM 815 - 1010 5) min. 650 min. 8
HM C1720P-HMC1720R-HM 910 - 1110 5) min. 750 min. 6
XHM C1720P-XHMC1720R-XHM 1100 - 1290 5) min. 930 min. 2
XHMS C1720P-XMHSC1720R-XMHS 1210 - 1400 5) min. 1030 min. 2
Mill Hardened 6)
TypeB (Good formability)
OMB C1720P-OMBC1720R-OMB 640 - 760 5) 480 - 660 min. 16
1/4HMB C1720P-1/4HMBC1720R-1/4HMB 760 - 830 5) 550 - 760 min. 15
1/2HMB C1720P-1/2HMBC1720R-1/2HMB 830 - 930 5) 660 - 860 min. 12
HMB C1720P-HMBC1720R-HMB 930 - 1030 5) 760 - 930 min. 9
XHMB C1720P-XHMBC1720R-XHMB 1070 - 1210 5) 930 - 1170 min. 4
XHMSB C1720P-XMHSBC1720R-XMHSB 1210 - 1310 5) 1030 - 1240 min. 3
Mill Hardened 6) 7)
TypeS (Excellent formability)
HM - TypeS C1720P-HM-TypeSC1720R-HM-TypeS min. 960 790 - 940 9 - 25
XHM - TypeS C1720P-XHM-TypeSC1720R-XHM-TypeS min. 1060 930 - 1070 6 - 22
Alloy Temper Designation 8) Hardness test 2) Electrical conductivity
3)
(%IACS)
Heat treatment
Vickers hardness HV
25 Age Hardenable 6) Before age hardening
O C1720P-OC1720R-O 90 - 160 - -
1/4H C1720P-1/4HC1720R-1/4H 145 - 220 - -
1/2H C1720P-1/2HC1720R-1/2H 180 - 240 - -
H C1720P-HC1720R-H 210 - 270 - -
After age hardening
OT C1720P-OTC1720R-OT 350 - 400 min. 22 3hr.at315°C
1/4HT C1720P-1/4HTC1720R-1/4HT 360 - 430 min. 22 2.5hr.at315°C
1/2HT C1720P-1/2HTC1720R-1/2HT 370 - 440 min. 22 2hr.at315°C
HT C1720P-HTC1720R-HT 380 - 450 min. 22 2hr.at315°C
Mill Hardened 6) (Standard) OM C1720P-OMC1720R-OM 220 - 270 min. 20 -
1/4HM C1720P-1/4HMC1720R-1/4HM 235 - 285 min. 17 -
1/2HM C1720P-1/2HMC1720R-1/2HM 260 - 310 min. 17 -
HM C1720P-HMC1720R-HM 295 - 345 min. 17 -
XHM C1720P-XHMC1720R-XHM 340 - 390 min. 17 -
XHMS C1720P-XMHSC1720R-XMHS 360 - 410 min. 17 -
Mill Hardened 6)
TypeB (Good formability)
OMB C1720P-OMBC1720R-OMB 190 - 250 min. 16 -
1/4HMB C1720P-1/4HMBC1720R-1/4HMB 215 - 280 min. 16 -
1/2HMB C1720P-1/2HMBC1720R-1/2HMB 255 - 310 min. 16 -
HMB C1720P-HMBC1720R-HMB 280 - 340 min. 17 -
XHMB C1720P-XHMBC1720R-XHMB 330 - 390 min. 17 -
XHMSB C1720P-XMHSBC1720R-XMHSB 360 - 410 min. 20 -
Mill Hardened 6) 7)
TypeS (Excellent formability)
HM - TypeS C1720P-HM-TypeSC1720R-HM-TypeS 285 - 370 min. 17 -
XHM - TypeS C1720P-XHM-TypeSC1720R-XHM-TypeS 315 - 395 min. 17 -

1) Values are applicable to thickness 0.1 mm and over.
2) Values are applicable to thickness 0.1 mm and over.
3) Electrical conductivity is for design guidance only.
4) The upper limits of tensile strength after age hardening are for design guidance only.
5) The upper limits of tensile strength of mill hardened strip are for design guidance only.
6) See page 12 for bending formability.
7) Contact us for purchase instructions.
8) P and R in column "Designation" represent "strip cut to length" and "strip in coils"

Tolerances

Thickness tolerance

Specified thickness Tolerance
Over Up to and including
from 0.050 0.08 ±0.004
0.08 0.1 ±0.005
0.1 0.15 ±0.006
0.15 0.2 ±0.008
0.2 0.25 ±0.010
0.25 0.4 ±0.015
0.4 0.55 ±0.020
0.55 0.7 ±0.025
0.7 0.9 ±0.030
0.9 1.2 ±0.035
1.2 1.5 ±0.045
1.5 2.0 ±0.050

note) When the tolerance is specified either plus or minus side only, the same range of tolerance shall be applied. In case of strip cut to length tolerance shall be determined individually.

Width tolerance(mm)

X axis:Speciied width; Y axis: Speciied thickness; Tolerance
Strip cut to length Strip in coils
Over Up to and including max. 200 max. 100 Over 100 up toand including 200
from 0.050 0.55 +2
-0
±0.1 ±0.2
0.55 2.0 +2
-0
±0.2 ±0.3

note) When the tolerance is specified either plus or minus side only, the same range of tolerance shall be applied.

Length tolerance(mm)

X axis:Speciied length; Y axis: Speciied thickness; Tolerance
Over Up to and including max. 1000
from 0.05 0.55 +8
-0
0.55 2.0 +10
-0

Camber tolerance(mm)

Specified Width Maximum value
Over Up to and including Over 1000 length
From 4 13 4
13 50 3
50 100 2
100 200 1
Camber tolerance(mm)

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