Intelligence – Insight – Ingenuity



This alloy conforms to BS 1400 PB2

Chemical Composition

  %   %   %
 Tin  11.0-13.0  Phosphorous  0.15 min  Lead  0.012-0.02
 Nickel  0.5 max  Zinc  0.3m  Copper  Remainder
 Impurities  0.15 max        


Mechanical Properties

Tensile Strength (N/mm2) 220-310
Elongation (%) 7
Brinell Hardness 69
Modulus of Elasticity (lbf/m2 x 106) 12

Strength at elevated temperatures

Service at elevated temperatures is limited by resistance to gradual deformation over prolonged periods of time and to oxidation.  It is not suitable for sustaining loads at temperatures exceeding 300°C.  The mechanical properties shown above cannot be used as an indication of performance at elevated temperatures.

Physical Properties

Coefficient of Thermal Expansion (per °C @ 0-250°C) 0.000018.3
Thermal conductivity (W/M°C) 45
Electrical conductivity (% copper standard @ 20°C) 9
Density (g/cm3) 8.8
Freezing range (°C) approx. 1000-831


Machinability is good, being a medium hardness alloy. This material gives short turnings.

Corrosion Resistance

This alloy finds wide application where good corrosion resistance is required.

Application and General notes

General uses include unlined bearings for heavy compressive loads and shock, piston rings, axle boxes, gear wheels, centrifugal castings, and castings which require good wear resistance.

HOW can MRT Castings help you?

I want...

New at MRT

Colosio Logo2

MRT Castings is delighted to announce the purchase of a new PFO250 fully automated, die casting cell, from Italian manufacturer Colosio.  

Read More
Southern 19

Visit us at stand C195 at the Farnborough Internaltional Exhibition & Conference Centre on 5th, 6th & 7th February 2019.

Read More
MRT-FactoryWizz Video

Around 6 months ago, we took a hard look at how we use the data we have available to us at MRT Castings. We looked at everything from data being used by machines, data being created by machines all the way through to where data is being left on the cutting room floor and where data can potentially be corrupted or lost through human error.

Read More