M3 (M3)
M3 (М3) Copper – High Performance Copper Alloy by Russian Metals
INTRODUCTION OF M3
M3 copper (М3) is a high-conductivity copper alloy widely used in aerospace, medical, defense, and electrical industries. With 99.5% minimum copper + silver content, M3 combines excellent electrical & thermal conductivity, good corrosion resistance, and superior workability. At Russian Metals, we are your trusted partner for premium M3 copper stock in wire, sheet, pipe, rod, and round bar forms — supplied at a competitive M3 price.
| Grade : | M3 ( М3 ) |
| Classification : | Copper |
Chemical composition in % for grade M3 ( М3 )
| Fe | Ni | S | As | Pb | O | Sb | Bi | Sn | - |
|---|---|---|---|---|---|---|---|---|---|
| max 0.05 | max 0.2 | max 0.01 | max 0.01 | max 0.01 | max 0.07 | max 0.005 | max 0.002 | max 0.05 | Cu+Ag min 99.7 |
Physical & Thermal Properties
| Property | Value |
|---|---|
| Density (ρ) | 8.94 g/cm³ |
| Thermal conductivity (λ) | ~387 W/m·K |
| Electrical resistivity (R) | ~17.8 nΩ·m |
| Young’s modulus (E) | 128–132 GPa |
| Melting temperature | 1083°C |
| Casting temperature | 1150–1250°C |
| Linear shrinkage | ~2.1% |
These properties make M3 copper highly reliable for electrical and high-temperature industrial applications.
Equivalent Grades of M3 Copper
| Standard / Country | Equivalent Grade |
|---|---|
| USA | C14200 |
| Germany (DIN/WNr) | C-Cu |
| England (BS) | C107 |
| Poland (PN) | Cu99.56 |
| Czechia (ČSN) | 423005 |
Easy cross-reference with international standards helps engineers and buyers find M3 copper alternatives globally.
Mechanical properties under Т=20oС for grade M3 ( М3 )
| Assortment | Dimension | Direct. | σB | σT | δ5 | ψ | KCU | Heat treatment |
|---|---|---|---|---|---|---|---|---|
| - | (mm) | - | MPa | MPa | % | kJ/m² | - | - |
| Pipe, GOST 617-2006 | 180-190 | 32 | ||||||
| soft cold-rolled, GOST 1173-2006 | 200-260 | 42 | ||||||
| hard cold-rolled, GOST 1173-2006 | 290 | 6 |
| Brinell hardness for M3 ( М3 ) , soft GOST 1173-2006 | HB 10 -1 = 55 MPa |
| Brinell hardness for M3 ( М3 ) , hard GOST 1173-2006 | HB 10 -1 = 95 MPa |
Supply Forms Available at Russian Metals
M3 Copper Rods & Round Bars – precision machining for electrical & aerospace use
M3 Copper Sheets & Strips – cold-rolled options for fabrication and industrial design
M3 Copper Wires – flexible and high conductivity for power transmission
M3 Copper Pipes & Tubes – seamless and welded options for marine & HVAC industries
We maintain large ready stock with competitive M3 price to ensure fast global delivery.
Applications of M3 Copper
- Electrical Industry: busbars, switchgear, motor windings, power connectors
- Aerospace & Defense: precision parts, cooling systems, high-stress components
- Industrial Equipment: heat exchangers, furnace parts, and welding tips
- Medical Technology: radiation shielding, diagnostic device components
- Marine Use: corrosion-resistant fittings and electrical terminals
Why Choose Russian Metals for M3 Copper?
- Reliable M3 copper stock available in multiple forms and tempers
- Competitive M3 price with bulk supply options
- Strict compliance with GOST & international standards
- Fast shipping and custom machining services available
Friction coefficient of the material M3 ( М3 ) .
| Friction coefficient with oil : | 0.011 |
| Friction coefficient without oil : | 0.43 |
Technological Properties M3 ( М3 )
| Melting temperature : | 1083 °C |
| Casting temperature : | 1150 - 1250 °C |
| Linear shrinkage : | 2.1 % |
Types of delivery of grade M1 ( М1 )
- B51 - Non-ferrous metals, including rare metals, and their alloys
- B53 - Sheets and Strips
- В54 - Ribbons
- B55 - Bars
- B64 - Pipes of non-ferrous metals and alloys
Order High-Quality M3 Copper Today
Looking for M3 copper in wire, sheet, rod, or tube form? Russian Metals offers premium M3 copper with assured quality, competitive M3 price, and fast worldwide delivery for aerospace, defense, and industrial needs.
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]
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]