Overview
About PB3 Copper Alloys
C P Steel Suppliers supplies PB3 Copper Alloys for engineering, industrial machinery and manufacturing applications. It is classified as Medium-Tin Phosphor Bronze for General Engineering Bushes, Valve Spindles & Springs. Common equivalents include PHOSPHOROUS BRONZE. Available forms include ROUND BARS, FLAT BARS.
Contact our Mumbai team with your required size and quantity to confirm availability, documentation and delivery.
PB3 Round Bar Suppliers, PB3 Stockist, PB3 Big Dia, PB3 Cut to size as per requirement, PB3 vs PHOSPHOROUS BRONZE, PB3 Flat Bar, PB3 Small Quantity, PB3 Larger Dia, PB3 Circle, Ring. PB3 Mumbai, Chennai, Tamil Nadu, Gujarat, Pune, Maharashtra, India etc.
Specification
Chemical Composition
ElementComposition (wt%)
SnTin
9.00 - 11.00 (BS 1400 PB3 Cast) / 4.50 - 8.50 (Wrought PB Bar)%
PPhosphorus
0.03 - 0.25%
PbLead
max 0.25%
ZnZinc
max 0.05%
FeIron
max 0.15%
CuCopper
Balance (approx. 88.5 - 94.5)
Performance
Mechanical, Physical & Processing Properties
PropertyValue / Reading
Tensile Strength230 - 300 MPa (Cast PB3) / 340 - 550 MPa (Cold-Drawn Wrought Bar)
Yield Strength130 - 170 MPa (Cast PB3) / 200 - 420 MPa (Cold-Drawn Wrought Bar)
Elongation10 - 20 %
Hardness Brinell70 - 130 HBW
PropertyValue / Reading
Density8.80 - 8.85 g/cm3
Melting Point850 - 1010 deg C
Modulus Of Elasticity105 - 110 GPa
Thermal Conductivity55 - 65 W/(m.K)
PropertyValue / Reading
WeldabilityGood for brazing and soldering; fair for TIG and MIG welding due to controlled lower phosphorus content.
MachinabilityModerate; higher ductility and toughness than PB1/PB2 make it well-suited for structural spindles, fasteners, and medium-load bushes.
Case HardeningCombines good elastic resilience and fatigue resistance with low sliding friction.
Corrosion ResistanceExcellent resistance to marine atmospheres, chemical process fluids, and stress-corrosion cracking.
Cross Reference
Equivalent Grades by Standard
Standard / RegionEquivalent Grade
Indian ISPhosphor Bronze Grade 3 / CuSn5 - CuSn9P (IS 28 / IS 7811)
European ENCuSn5 (CW451K) / CuSn6 (CW452K) / CuSn8 (CW453K)
Germany DINCuSn6 / CuSn8 / G-CuSn10
Japan JISC5191 / PBC2 (JIS H3270 / H5120)
UK (BS)PB3 (BS 1400) / PB102 (BS 2874)
USA (SAE / AISI)UNS C51000 / C52100 / C90500
Availability
Available Forms & Sizes
- ROUND BARS
- FLAT BARS
FAQ
PB3 — frequently asked questions
What is the equivalent of PB3?
Common equivalents include PHOSPHOROUS BRONZE. Standards: Indian IS: Phosphor Bronze Grade 3 / CuSn5 - CuSn9P (IS 28 / IS 7811); European EN: CuSn5 (CW451K) / CuSn6 (CW452K) / CuSn8 (CW453K); Germany DIN: CuSn6 / CuSn8 / G-CuSn10; Japan JIS: C5191 / PBC2 (JIS H3270 / H5120); UK (BS): PB3 (BS 1400) / PB102 (BS 2874); USA (SAE / AISI): UNS C51000 / C52100 / C90500.
Which forms of PB3 are available?
PB3 is available as ROUND BARS, FLAT BARS.
Where can I buy PB3 Copper Alloys in Mumbai or across India?
C P Steel Suppliers supplies PB3 Copper Alloys from Mumbai. Contact us with your size and quantity to confirm availability and delivery.
Interested in Copper Alloys PB3?
Tell us the size and quantity you need and we will get back to you.