Technical Data
Beryllium Copper is our specialty. We have pioneered the use of this metal since its commercial inception and have led in its development and uses.
BERYLLIUM COPPER
C17200 and C17300 – Heat Treatable
| COMPOSITION – BERYLLIUM COPPER C17200 & C17300 (25 & 125 alloy) |
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| ELEMENT | PERCENT | ||
| NOMINAL | MINIMUM | MAXIMUM | |
| Copper | 98.1 | – | – |
| Beryllium | 1.90 | 1.80 | 2.0 |
| Cobalt & Nickel | – | .20 | – |
| Cobalt & Nickel & Iron | – | – | .60 |
| Cu + Be + Co + Ni + Fe | – | 99.50 | – |
| Silicon | – | – | .20 |
| Aluminum | – | – | .20 |
| Lead | – | – | .20 – .60 for (C17300) |
| PHYSICAL PROPERTIES BERYLLIUM COPPER C17200 & C17300 |
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| HEAT TREATED CONDITION | ENGLISH UNITS | METRIC UNITS |
| Melting Range | 1590 – 1800°F | 865 – 980°C |
| Density | .298 lb/cu in. @ 68°F | 8.26 gm/cm@ 20°C |
| Specific Gravity | 8.26 | 8.26 |
| Coefficient of Thermal Expansion | .0000099 per °F (68-572°F) | .0000178 per °C (20-300°C) |
| Thermal Conductivity | 62-75 BTU/sq ft/ft/hr/°F @ 68°F | .26-.31 cal/sq cm/cm/sec/°C @ 20°C |
| Electrical Resistivity | 46.2 Ohms-circ mil/ft @ 68°F | 7.68 microhm – cm @ 20°C |
| Electrical Conductivity | ||
| (age hardenable) | 15-19% Copper IACS @ 68°F | .87-.110 megohm cm @ 20°C |
| (age hardened) | 19-28% Copper IACS @ 68°F | .110-.163 megohm cm @ 20°C |
| Specific Heat | .10 BTU/lb/°F @ 68°F | .10 cal/gm/°C @ 20°C |
| Modulus of Elasticity (tension) | ||
| (age hardenable) | 17,000 KSI | 12,000 kg/sq mm |
| (age hardened) | 18,500 KSI | 13,000 kg/sq mm |
| Modulus of Rigidity (torsion) | ||
| (age hardenable) | 7,300 KSI | 5,000 kg/sq mm |
| (age hardened) | 6,500 KSI | 4,600 kg/sq mm |
| MECHANICAL PROPERTIES BERYLLIUM COPPER C17200 & C17300 |
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| For Round, Half Round and Square Wire | |||||||
| AS SUPPLIED | AFTER PRECIPITATION HEAT TREATMENT | ||||||
| DESIGNATION | TENSILE STRENGTH | DESIGNATION | TENSILE STRENGTH | ||||
| STD. | FORMER | KSI* | MPa** | STD. | FORMER | KSI* | MPa** |
| TB00 | Solution Annealed (A) | 58-78 | 400-540 | TF00 | Precipitation Hardened (AT) | 165-190 | 1105-1310 |
| TD01 | Quarter Hard (1/4H) | 90-115 | 620-795 | TH01 | Precipitation Hardened (1/4HT) | 175-205 | 1205-1415 |
| TD02 | Half Hard (1/2H) | 110-135 | 760-930 | TH02 | Half Hard (1/2HT) | 185-210 | 1275-1480 |
| TD03 | Three Quarter Hard (3/4H) | 130-155 | 895-1070 | TH03 | Three Quarter Hard (3/4H) | 190-230 | 1310-1585 |
| TD04 | Hard (H) | 140-165 | 965-1140 | TH04 | Hard (HT) | 195-230 | 1345-1585 |
| TD05 | Five NOs Hard | 150-175 | 1035-1200 | TH05 | Five NOs Hard | 195-230 | 1035-1205 |
| TD06 | Extra Hard (XH) | 155-180 | 1070-1240 | TH06 | Extra Hard (XH) | 205-235 | 1415-1620 |
Yield Strength @ .2% offset, about 92% of T.S. (after Heat Treat)
| MECHANICAL PROPERTIES – BERYLLIUM COPPER C17200 & C17300 | |||
| For Rolled Flat Wire other than Square – As Supplied | |||
| DESIGNATION | TENSILE STRENGTH | ||
| STD. | FORMER | KSI* | MPa** |
| TB00 | Solution Annealed (A) | 60-78 | 410-540 |
| TD01 | Quarter Hard (1/4H) | 75-88 | 510-610 |
| TD02 | Half Hard (1/2H) | 85-100 | 590-690 |
| TD04 | Hard (H) | 100-120 | 690-830 |
| MECHANICAL PROPERTIES – BERYLLIUM COPPER C17200 & C17300 | |||
| For Rolled Flat Wire other than Square – After Precipitation Heat Treatment |
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| DESIGNATION | TENSILE STRENGTH | ||
| STD. | FORMER | KSI* | MPa** |
| TF00 | Solution Annealed (AT) | 165-190 | 1140-1310 |
| TH01 | Quarter Hard (1/4HT) | 175-200 | 1210-1380 |
| TH02 | Half Hard (1/2HT) | 185-210 | 1280-1450 |
| TH04 | Hard (HT) | 190-215 | 1310-1480 |
| HEAT TREATMENT BERYLLIUM COPPER C17200 & C17300 |
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| DESIGNATION | HOURS @ 600°F | ||
| STD. | FORMER | FLAT WIRE | ROUND WIRE |
| TF00 | Solution Annealed (AT) | 3 | 3 |
| TH01 | Quarter Hard (1/4HT) | 2-1/2 | 2 |
| TH02 | Half Hard | 2 | 1-1/2 |
| TH03 | Three Quarters Hard and Up | 2 | 1 |
This is standard specification treatment.
Temperatures from 550°F -700°F (288 – 370°C) are used for special purposes with corresponding adjustments of time.
BERYLLIUM COPPER C17200 & C17300