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2505A – 158 Degree F
Low Melting Alloy
2 lb Cake Even Weight

2581H – 281 Degree F
Low Melting Alloy
1/8″ & Down Shot

2581A – 281 Degree F
Low Melting Alloy
2 lb Cake Even Weight

2491A – 136 Degree F
Low Melting Alloy
2 lb Cake Even Weight

2503C – 203-226 Deg F
Low Melting Alloy
Capping Bar

2491DS1C – 136 Degree
Low Melting Alloy
1/8″ Diameter Solid Wire

Low Melting (Fusible) Alloys

Featuring 158°F, 203°F radiation shielding alloys, pipe bending alloys, and low temperature solders. Eutectic: melting points from 117° – 281°F.Non-eutectic: melting points from 107° – 338°F.Mellottes metal, Rose metal, Wood’s metal, and others. Low-melting alloy wire.

Low-Melting or Fusible alloys (Also known as Eutectic and Non-Eutectic Alloys) are generally the alloys that melt below 450 Deg. F. ( 233 Deg. C ). The most useful are the alloys containing high percentages of Bismuth combined with Lead, Tin, Cadmium, Indium and other metals. The low melting temperature and unique growth/shrinkage characteristics of these alloys lead to a greater diversity in useful applications than almost any other alloy system.

Applications:

From radiation therapy shielding applications to creating chucks for holding parts during machining , from being used as filler material when bending pipe or tube to creating fusible elements in automatic fire sprinklers , Low-Melting alloys continue to have a quiet yet profound impact on our lives.

Forms:

Cake, Ingot, Bar, Shot, Wire, Stick, Strip & Custom Shapes

Featured Product Specifications

Belmont
Product
Code
Industry
Designation
Melting
Point
-
Solidus
Melting
Point
-
Liquidus
Nominal
Composition
Short-Term
Tensile
Strength
lbs/sq.in.
Yield
Temperature
Weight
lbs/cu.in
Brinnell
Hardness
No.
(500
kg)
Growth/Shrinkage
-
Time
after
Casting
- - F C F C Bi Pb Sn Cd Others - F - - After 2 Min After 1 hr. After 24 hr After 500 hr
2451 LOW 117 117 47 117 47 44.70% 22.60% 8.30% 5.30% In 19.1% 5400 117 .32 12.0 +.0005 -.0001 -.0002 -.0002
2491 LOW 136 136 58 136 58 49% 18% 12% - In 21% 6300 136 .31 14.0 +.0003 .0000 -.0002 -.0002
2505 BEND 158 70 158 70 50% 26.70% 13.30% 10% - 5990 158 .339 9.2 +.0025 +.0051 +.0051 +.0057
2502 WOODS 158 70 169 76 50% 25% 12.50% 12.50% - 6100 158 .347 9.3 -.0001 +.0002 +.0031 +.0035
2431 SAFE 160 71 190 88 42.50% 37.70% 11.30% 8.50% - 5400 162.5 .341 9.0 -.0004 .0000 +.0022 +.0025
2531 MELLOTTES 203 95 203 95 52.50% 32% 15.50% - - 6100 203 .350 9.0 -.0002 +.0055 +.0057 +.0061
2503 ROSE 203 95 239 115 50% 25% 25% - - 6200 203 .3365 9.5 -.0001 +.0045 +.0052 +.0060
2481 MATRIX 218 103 440 227 48% 28.50% 14.50% - Sb 9.0% 13000 240 .343 19.0 +.0008 +.0048 +.0051 +.0061
2562 BASE 255 124 255 124 55.50% 44.50% - - - 6400 255 .38 10.2 -.0008 -.0008 +.0008 +.0022
2581 TRU 281 138 281 138 58% - 42% - - 8000 281 .315 22.0 +.0007 +.0006 +.0005 +.0005
2405 CAST 281 138 338 170 40% - 60% - - 8000 302 .296 22.0 -.0001 -.0001 -.0001 -.0001
2451
Industry Designation LOW 117
Melting Point - SolidusF - 117C - 47
Melting Point - LiquidusF - 117C - 47
Nominal CompositionBi - 44.70%Pb - 22.60%Sn - 8.30%Cd - 5.30%Others : In 19.1%
Short-Term Tensile Strength lbs/sq.in. 5400
Yield TemperatureF - 117
Weight lbs/cu.in .32
Brinnell Hardness No. (500 kg) 12.0
Growth/Shrinkage - Time after CastingAfter 2 Min : +.0005After 1 hr. : -.0001After 24 hr : -.0002After 500 hr : -.0002
2491
Industry Designation LOW 136
Melting Point - SolidusF - 136C - 58
Melting Point - LiquidusF - 136C - 58
Nominal CompositionBi - 49%Pb - 18%Sn - 12%Others : In 21%
Short-Term Tensile Strength lbs/sq.in. 6300
Yield TemperatureF - 136
Weight lbs/cu.in .31
Brinnell Hardness No. (500 kg) 14.0
Growth/Shrinkage - Time after CastingAfter 2 Min : +.0003After 1 hr. : .0000After 24 hr : -.0002After 500 hr : -.0002
2505
Industry Designation BEND
Melting Point - SolidusF - 158C - 70
Melting Point - LiquidusF - 158C - 70
Nominal CompositionBi - 50%Pb - 26.70%Sn - 13.30%Cd - 10%
Short-Term Tensile Strength lbs/sq.in. 5990
Yield TemperatureF - 158
Weight lbs/cu.in .339
Brinnell Hardness No. (500 kg) 9.2
Growth/Shrinkage - Time after CastingAfter 2 Min : +.0025After 1 hr. : +.0051After 24 hr : +.0051After 500 hr : +.0057
2502
Industry Designation WOODS
Melting Point - SolidusF - 158C - 70
Melting Point - LiquidusF - 169C - 76
Nominal CompositionBi - 50%Pb - 25%Sn - 12.50%Cd - 12.50%
Short-Term Tensile Strength lbs/sq.in. 6100
Yield TemperatureF - 158
Weight lbs/cu.in .347
Brinnell Hardness No. (500 kg) 9.3
Growth/Shrinkage - Time after CastingAfter 2 Min : -.0001After 1 hr. : +.0002After 24 hr : +.0031After 500 hr : +.0035
2431
Industry Designation SAFE
Melting Point - SolidusF - 160C - 71
Melting Point - LiquidusF - 190C - 88
Nominal CompositionBi - 42.50%Pb - 37.70%Sn - 11.30%Cd - 8.50%
Short-Term Tensile Strength lbs/sq.in. 5400
Yield TemperatureF - 162.5
Weight lbs/cu.in .341
Brinnell Hardness No. (500 kg) 9.0
Growth/Shrinkage - Time after CastingAfter 2 Min : -.0004After 1 hr. : .0000After 24 hr : +.0022After 500 hr : +.0025
2531
Industry Designation MELLOTTES
Melting Point - SolidusF - 203C - 95
Melting Point - LiquidusF - 203C - 95
Nominal CompositionBi - 52.50%Pb - 32%Sn - 15.50%
Short-Term Tensile Strength lbs/sq.in. 6100
Yield TemperatureF - 203
Weight lbs/cu.in .350
Brinnell Hardness No. (500 kg) 9.0
Growth/Shrinkage - Time after CastingAfter 2 Min : -.0002After 1 hr. : +.0055After 24 hr : +.0057After 500 hr : +.0061
2503
Industry Designation ROSE
Melting Point - SolidusF - 203C - 95
Melting Point - LiquidusF - 239C - 115
Nominal CompositionBi - 50%Pb - 25%Sn - 25%
Short-Term Tensile Strength lbs/sq.in. 6200
Yield TemperatureF - 203
Weight lbs/cu.in .3365
Brinnell Hardness No. (500 kg) 9.5
Growth/Shrinkage - Time after CastingAfter 2 Min : -.0001After 1 hr. : +.0045After 24 hr : +.0052After 500 hr : +.0060
2481
Industry Designation MATRIX
Melting Point - SolidusF - 218C - 103
Melting Point - LiquidusF - 440C - 227
Nominal CompositionBi - 48%Pb - 28.50%Sn - 14.50%Others : Sb 9.0%
Short-Term Tensile Strength lbs/sq.in. 13000
Yield TemperatureF - 240
Weight lbs/cu.in .343
Brinnell Hardness No. (500 kg) 19.0
Growth/Shrinkage - Time after CastingAfter 2 Min : +.0008After 1 hr. : +.0048After 24 hr : +.0051After 500 hr : +.0061
2562
Industry Designation BASE
Melting Point - SolidusF - 255C - 124
Melting Point - LiquidusF - 255C - 124
Nominal CompositionBi - 55.50%Pb - 44.50%
Short-Term Tensile Strength lbs/sq.in. 6400
Yield TemperatureF - 255
Weight lbs/cu.in .38
Brinnell Hardness No. (500 kg) 10.2
Growth/Shrinkage - Time after CastingAfter 2 Min : -.0008After 1 hr. : -.0008After 24 hr : +.0008After 500 hr : +.0022
2581
Industry Designation TRU
Melting Point - SolidusF - 281C - 138
Melting Point - LiquidusF - 281C - 138
Nominal CompositionBi - 58%Sn - 42%
Short-Term Tensile Strength lbs/sq.in. 8000
Yield TemperatureF - 281
Weight lbs/cu.in .315
Brinnell Hardness No. (500 kg) 22.0
Growth/Shrinkage - Time after CastingAfter 2 Min : +.0007After 1 hr. : +.0006After 24 hr : +.0005After 500 hr : +.0005
2405
Industry Designation CAST
Melting Point - SolidusF - 281C - 138
Melting Point - LiquidusF - 338C - 170
Nominal CompositionBi - 40%Sn - 60%
Short-Term Tensile Strength lbs/sq.in. 8000
Yield TemperatureF - 302
Weight lbs/cu.in .296
Brinnell Hardness No. (500 kg) 22.0
Growth/Shrinkage - Time after CastingAfter 2 Min : -.0001After 1 hr. : -.0001After 24 hr : -.0001After 500 hr : -.0001