SWISSMETAL                      B14                                                AVINS 

• B14 strip temper bend property & mechanical info

Guaranteed composition

Sn 13.10 - 13.90  Fe < 0.02  Cu remainder

Main technological
characteristics

Bronze with a unique combination of high yield strength and low modulus of elasticity suitable for spring applications demanding a very large elastic deformation and/or applications requiring a large accumulation of elastic energy.

Delivery in form of                  drawn in round sections

Specialties                                rods (f max 0.315") or wires in rings (f max 0.197")

Physical properties

density (68 °F)

electrical conductivity

thermal conductivity

thermal capacity (specific heat)

coefficient of thermal expansion

magnetic properties

melting interval

color

0.314 lb/in³

5.2 (9) %IACS

308.5 Btu.in./h.ft².°F

0.086 Btu/lb.°F

0.000009 in/in.°F

non magnetic

1472 - 1796°F

brown

Capacity of
forming/machining

machinability rating (free cutting brass = 100)

tool life (free cutting brass = 110)

tendency for short chips (free cutting brass = 90)

capacity of cold working

capacity of hot working

capacity of soft soldering

capacity of hard soldering

capacity of resistance welding

thermal stress relieve

annealing

capacity of polishing

capacity of galvanic plating

50

50

50

very good

middle

good

middle-good

good

540°F - 4h at temperature

1200°F - 1h at temperature

excellent

excellent

Typical mechanical
properties

dimensions f 0.020 - 0.315 in.

tensile strength  Rm       [PSI]

yield strength    Rp_0.2       [PSI]

elongation         A_2"         [%]

hardness                      Vickers

annealed

66,700

24,650

65

100

½ hard (40%)

129,060

101,500

12

220

hard (75%)

174,000

145,000

1

290

                                                                   modulus of elasticity = 12,325,990 PSI

Corrosion resistance

stress corrosion

industrial atmosphere

rural atmosphere

marine atmosphere

salt 

spray (ISO 9227, 10 days)

corrosion resistance to sulphur-agents (ISO 4538, 10 days)

fresh water

high relative humidity and elevated temperature

sea water

few sensitive

good

good

good

middle-good

good

good

middle-good

good

galvanic:

copper alloys present a high and positive standard potential for corrosion. Consequently, there is a risk of galvanic corrosion if they enter into contact with material of lower standard potential ,such as steel containing less than 13% of chromium.

Typical applications

- partial replacement of Beryllium Copper (C17200)

- parts with a critical spring requirement

- spring contacts

- spare parts for eyeglass

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