bedra 37700
Leaded Brass
Characteristics:
It is a leaded brass alloy primarily composed of copper, zinc, and lead, designed for forging and machining applications.
Typical applications:
It is is commonly used in industrial, electrical, and building hardware applications, such as builders hardware, electrical components, and building and industrial fittings.
Standardization and composition
| UNS | C37700 / C37710 |
|---|---|
| EN | CuZn40Pb2 (CW617N) |
| JIS | C3771 |
| GB | HPb58-2 |
| Cu | 57.0-59.0% |
| Pb | 1.6-2.5% |
| Ni | ≤ 0.3% |
| Sn | < 0.3% |
| Al | < 0.05% |
| Zn | balance |
Physical properties①
Note①：The testing temperature is 20℃. Note②：The testing temperature range is 20℃ to 300℃.
| Density (g/cm³) | 8.4 |
|---|---|
| Metling temperature (℃) | 899 |
| Electrical conductivity (%IACS) | 27 |
| Thermal conductivity (W / m x K) | 120 |
| Coefficient of thermal expansion② (10-6/K) | 20.1 |
| Modulus of elasticity (GPa) | 103 |
Fabrication Properties
| Turning | Fair |
| Cold-heading | Poor |
| Bending | Poor |
| Polishing | Fair |
| Deep drawing | Good |
| Riveting | Poor |
| Thread rolling | Poor |
| Tapping | Good |
Mechanical Properties③
Note③：bedra technical standards
| Diameter (mm) | Temper | Tensile Strength (MPa Typ.) | Yield Strength (MPa Typ.) | Elongation (A% Typ.) | Hardness (HV5 Typ.) |
|---|---|---|---|---|---|
| 1.5 ≤ Ф < 3.0 | H02 | 560 | 540 | 8.0 | 165 |
| 1.5 ≤ Ф < 3.0 | H04 | 620 | 520 | 5.0 | 185 |
| 3.0 ≤ Ф < 8.0 | H02 | 540 | 480 | 12 | 150 |
| 3.0 ≤ Ф < 8.0 | H04 | 560 | 450 | 7.0 | 180 |
| 8.0 ≤ Ф < 15 | H02 | 510 | 440 | 15 | 150 |
| 8.0 ≤ Ф < 15 | H04 | 555 | 450 | 11 | 170 |
| 15 ≤ Ф < 35 | H02 | 500 | 400 | 18 | 140 |
| 15 ≤ Ф < 35 | H04 | 505 | 420 | 15 | 150 |
| 35 ≤ Ф < 60 | H02 | 480 | 410 | 12 | 145 |
| 35 ≤ Ф < 60 | H04 | 450 | 360 | 17 | 150 |
| / | M | ＞ 350 | ＞ 180 | ＞ 18 | ＞ 75 |
| / | R | ＞ 360 | ＞ 170 | ＞ 15 | ＞ 80 |
Dimension & Tolerance of Round Bars
Note④：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.
| Diameter (mm) | Tolerance④ (mm) | Tolerance consistency (mm) | Ovality (mm) | Length (mm. max.) | Straightness (mm/m max.) |
|---|---|---|---|---|---|
| 1.5 ≤ Φ < 3.0 | 0.03 | 0.01 | 0.005 | 0.15 | 2000 |
| 3.0 ≤ Φ < 1.0 | 0.04 | 0.02 | 0.010 | 0.25 | 4000 |
| 10 ≤ Φ < 25 | 0.08 | 0.03 | 0.015 | 0.25 | 4000 |
| 25 ≤ Φ < 50 | 0.12 | 0.05 | 0.025 | 0.30 | 4000 |
| 50 ≤ Φ < 60 | 0.20 | 0.10 | 0.050 | 0.50 | 6000 |
Dimension & Tolerance of Hexagonal/Square Bars
Note⑤："a" refers to the distance across the flats of a square shape, and "s" refers to the distance across the flats of a hexagonal shape Note⑥：The tolerances listed in the table are specified as all plus or all minus. When tolerances are specified as plu
| Diameter⑤ (mm) | Tolerance ⑥(mm) | Tolerance consistency (mm) | Torsion (mm/m max.) | Chamfer Radius (mm min.) | Straightness (mm/m max.) | Length (mm. max.) |
|---|---|---|---|---|---|---|
| 2.0 ≤ a/s < 6.0 | 0.04 | 0.02 | 0.3 | 0.2 | 0.20 | 4000 |
| 6.0 ≤ a/s < 10 | 0.05 | 0.03 | 0.3 | 0.2 | 0.25 | 4000 |
| 10 ≤ a/s < 20 | 0.12 | 0.06 | 0.5 | 0.5 | 0.50 | 4000 |
| 20 ≤ a/s < 30 | 0.18 | 0.09 | 0.5 | 0.5 | 0.50 | 4000 |
| 30 ≤ a/s < 42 | 0.36 | 0.18 | 0.5 | 1.0 | 0.75 | 6000 |
Dimension Tolerance for Round Wires
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.
| Diameter (mm) | Tolerance⑦(mm) | Tolerance consistency (mm) | Ovality (mm) | ID (mm. max.) | Weight (kg) |
|---|---|---|---|---|---|
| 0.5 ≤ Φ < 3.0 | 0.03 | 0.01 | 0.005 | 330-360 | 20-35 |
| 3.0 ≤ Φ < 10 | 0.04 | 0.02 | 0.010 | 430-650 | 50-300 |
| 10 ≤ Φ < 18 | 0.08 | 0.03 | 0.015 | 650-1200 | 200-800 |
Dimension Tolerance for Hexagonal / Square Wires
Note⑧："a" refers to the distance across the flats of a square shape, and "s" refers to the distance across the flats of a hexagonal shape Note⑨：The tolerances listed in the table are specified as all plus or all minus. When tolerances are specified as plu
| Dimension⑧ (mm) | Tolerance⑨ (mm) | Tolerance consistency (mm) | Chamfer Radius (mm) | ID (mm. max.) | Weight (kg) |
|---|---|---|---|---|---|
| 1.5 ≤ a/s < 2.5 | 0.03 | 0.01 | 0.2 | 330-360 | 20-35 |
| 2.5 ≤ a/s < 10 | 0.04 | 0.02 | 0.2 | 430-650 | 50-300 |
| 10 ≤ a/s < 17 | 0.08 | 0.03 | 0.5 | 650-1200 | 200-800 |
Other Delivery Forms
Tubes, Profiles
Further product information
PDF Datasheet | EN PDF Datasheet | VI PDF Datasheet | ZH
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