Phosphor Bronze Sheet and Plate

CuSn5, CuSn6 and CuSn8 phosphor bronze sheet and plate for springs, contacts and wear parts, in thicknesses of 0.50–20 mm.

Grades and sizes

CuSn5 · CW451K

CuSn5

A wrought phosphor bronze with about 5 % tin and a small phosphorus content. It has good cold formability and develops spring properties when hardened by cold rolling. Its electrical conductivity is slightly higher than that of CuSn6 and CuSn8. Used for spring contacts, connectors, diaphragms and bent electrical parts.

INTERNATIONAL EQUIVALENTS

EN CW451K · UNS C51000 · BS PB102
Sheet standards: EN 1652 · ASTM B103

CuSn6 · CW452K

CuSn6

The most widely used wrought phosphor bronze, with about 6 % tin and a small phosphorus content. It offers a balanced combination of strength, spring properties, fatigue strength and formability, and resists atmospheric corrosion and marine air. Used for springs, electrical contacts and connectors, diaphragms, bushes and sliding parts.

INTERNATIONAL EQUIVALENTS

EN CW452K · DIN 2.1020 · UNS C51900 · BS PB103
Sheet standards: EN 1652 · ASTM B103

CuSn8 · CW453K

CuSn8

A wrought phosphor bronze with about 8 % tin and a small phosphorus content. The higher tin content gives better strength, wear resistance and sliding properties than CuSn6, at the cost of somewhat lower formability. Used for wrapped bushes and plain bearings, wear plates, highly loaded springs and contact parts.

INTERNATIONAL EQUIVALENTS

EN CW453K · DIN 2.1030 · UNS C52100 · BS PB104
Sheet standards: EN 1652 · ASTM B103

THICKNESS: 0.50–20 mm
SHEET SIZE: 660 × 2000 mm
TEMPER: CuSn5 R310–R690 · CuSn6 R350–R720 · CuSn8 R370–R740
ORDERING: Minimum cut size 660 × 500 mm

For large-quantity orders, other cut sizes are possible.

Request a quote on WhatsApp Calculate weight ↓Request technical data

Chemical composition, mechanical properties and material certificates are available on request.

Phosphor bronze sheet and plate weight calculator

Calculate the weight from the size, or the number of sheets needed for a target weight. Your selections are added to the quote message automatically.

GRADE

SIZE · STANDARD OR CUSTOM

ThicknessmmWidthmmLengthmmQuantitypcs

CuSn5: calculated with a density of 8.8 g/cm³.

TOTAL THEORETICAL WEIGHT

23.23 kg

23.23 kg per piece · quantity: 1

Order terms: Minimum cut size 660 × 500 mm. This is a theoretical weight; we invoice on the actual weight as weighed.

YOUR MESSAGE

Hello, I would like a quote for Phosphor Bronze Sheet and Plate (CuSn5).
Size: 2 × 660 × 2000 mm, quantity: 1 (theoretical ~23.23 kg)

Request a quote for this size on WhatsApp or send by e-mail →

For other bronze sizes, weight-per-metre tables and densities, see the Bronze weight calculator →

Applications

Spring and contact plates
Wear and slide plates
Electrical connector parts
Precision stamped parts

Frequently asked questions

What are the designations for CuSn5, CuSn6 and CuSn8?

CuSn5: EN CW451K, UNS C51000, BS PB102. CuSn6: EN CW452K, DIN 2.1020, UNS C51900, BS PB103. CuSn8: EN CW453K, DIN 2.1030, UNS C52100, BS PB104. Any of these designations can be used in your enquiry; we will match the correct material.

Why can the invoiced weight differ from the calculated weight?

The calculator gives the theoretical weight. The actual weight varies with dimensional tolerances and cutting allowance; we invoice on the actual weight as weighed.

What information should I send for a quote?

We only need the grade, size (thickness × width × length), quantity and delivery location. If you fill in the calculator above, these details are added to the WhatsApp message automatically.