LS591 (Л63)
LS59-1 (ЛС59-1) Brass Copper Alloy – Properties & Applications
INTRODUCTION OF LS59-1
LS59-1, also known as ЛС59-1, is a high-performance copper-zinc alloy widely used for precision components requiring excellent machinability, corrosion resistance, and electrical conductivity. At Russian Metals, we manufacture and supply LS59-1 brass in various forms such as bars, wires, sheets, strips, and rods for industries like aerospace, medical, defense, and electrical engineering.
| Grade : | LS591 ( ЛС59-1 ) |
| Classification : | Copper-zinc alloys pressure treated |
Chemical Composition of LS59-1 (ЛС59-1)
| Element | Composition (%) |
|---|---|
| Copper (Cu) | 57 – 60 |
| Zinc (Zn) | 37.05 – 42.2 |
| Lead (Pb) | 0.8 – 1.9 |
| Iron (Fe) | max 0.5 |
| Tin (Sn) | max 0.3 |
| Phosphorus (P) | max 0.02 |
| Antimony (Sb) | max 0.01 |
| Bismuth (Bi) | max 0.003 |
| Impurities | ≤ 0.75 |
Note: Zinc is the base element; the percentage may vary slightly depending on production standards.
Chemical composition in % for grade LS59-1( ЛС59-1 )
| Fe | P | Cu | Pb | Zn | Sb | Bi | Sn | Impurity | - |
|---|---|---|---|---|---|---|---|---|---|
| max 0.5 | max 0.02 | 57 - 60 | 0.8 - 1.9 | 37.05 - 42.2 | max 0.01 | max 0.003 | max 0.3 | all 0.75 | Si + Sn 0.5 % |
Comment: Zn is a basis; the percentage of Zn is given approximately.
Mechanical properties under Т=20oС for grade LS59-1 ( ЛС59-1 )
| Assortment | Dimension | Direct. | d5 | σT | Ψ | KCU | Heat treatment |
|---|---|---|---|---|---|---|---|
| - | (mm) | - | MPa | MPa | % | kJ/m² | - |
| Pipe, GOST 494-90 | - | 390 | - | - | - | - | - |
| Bar, GOST 2060-2006 | - | 360 | - | 22 | - | - | - |
| Bar, GOST 31366-2008 | - | 490 | - | 7 | - | - | - |
| Bar, GOST 31366-2008 | - | 330 | - | 25 | - | - | - |
| Wire, GOST 1066-90 | - | 340 | - | 25-30 | - | - | - |
| Wire, GOST 1066-90 | - | 440-640 | - | 1-8 | - | - | - |
| Strip, GOST 931-90 | - | 460-610 | - | 5 | - | - | - |
| Strip, GOST 931-90 | - | 340-470 | - | 25 | - | - | - |
| Strip hotrolled, GOST 931-90 | - | 360-490 | - | 18 | - | - | - |
| Brinell hardness for LS59-1 ( ЛС59-1 ) , Sheet GOST 2208-2007 | HB 10 -1 = 100 MPa |
| Brinell hardness for LS59-1 ( ЛС59-1 ) , Sheet GOST 2208-2007 | HB 10 -1 = 200 MPa |
| Brinell hardness for LS59-1 ( ЛС59-1 ) , Bar GOST 2060-2006 | HB 10 -1 = 80 MPa |
| Brinell hardness for LS59-1 ( ЛС59-1 ) , Bar GOST 2060-2006 | HB 10 -1 = 130 MPa |
Mechanical Properties of LS59-1 Brass
| Product Type | Tensile Strength (MPa) | Elongation (%) | Brinell Hardness (HB) |
|---|---|---|---|
| Bar (GOST 2060-2006) | 360 – 490 | 7 – 25 | 80 – 130 |
| Wire (GOST 1066-90) | 340 – 640 | 1 – 30 | – |
| Sheet / Strip | 340 – 610 | 5 – 25 | 100 – 200 |
| Pipe (GOST 494-90) | 390 | – | – |
Tensile strength (σв): up to 490 MPa
Yield strength (σT): ~330–490 MPa depending on condition
Brinell hardness (HB): 80–200 MPa
Friction coefficient: 0.0135 (lubricated) / 0.17 (dry)
Types of delivery of grade LS59-1 ( ЛС59-1 )
- B53 - Sheets and Strips
- В54 - Ribbons
- B55 - Bars
- B64 - Pipes of non-ferrous metals and alloys
- B74 - Wire made of non-ferrous metals and their alloys
Equivalent Grades of LS59-1
| Country / Standard | Equivalent Grade |
|---|---|
| USA | C37000, C38000 |
| Germany (DIN/WNr) | 2.0402 |
| Japan (JIS) | C3710 |
| England (BS) | CZ129 |
| Europe (EN) | CW607N (CuZn38Pb1.5) |
| Poland | CuZn38Pb1 |
| Czechia | CuZn39Pb1 |
Applications of LS59-1 Brass Copper
- Electrical industry: terminals, switchgear parts, connectors
- Automotive & aerospace: bushings, gears, precision machined parts
- Medical devices: durable conductive components
- Marine & defense: corrosion-resistant fittings and fasteners
- Industrial hardware: valves, plumbing accessories, decorative elements
Specification
Mechanical properties :
σB - Tensile strength [MPa]
σT - Yield stress [MPa]
δ5 - Specific elongation at fracture [%]
ψ - Reduction of area [%]
KCU - Impact strength [kJ/m²]
HB - Brinell hardness [MPa]
Why Choose Russian Metals for LS59-1?
- High-quality manufacturing with international standards (GOST, EN, ASTM).
- Wide stock availability in bars, wires, strips, and custom sizes.
- Precision machining & global delivery for industrial and aerospace needs.
- Trusted supplier of LS59-1 drawn copper wire with proven performance.
Physical properties :
T - Test temperature [Grade]
E - Young modulus [MPa]
α - Coefficient of linear expansion (20° - T) [1/Grade]
λ - Thermal (heat) condition coefficient [Watt/(m·Grade)]
ρ - Density [kg/m³]
C - Specific heat (range 20° - T) [J/(kg·Grade)]
R - Electrical resistance [Ohm·m]