Downloads (2)

Safety DataSheet (SDS)226 KB
Technical DataSheet (TDS)283 KB

Specification

Weight and Dimensions
Density8.6g/cm³
Product Data
Brinell Hardness22
Electrical Resistivity59.071.4 mΩ.cm
Thermal Properties
Melting/Solidification Point138°C
Specific Heat Capacity0.167J/g˚C
Specific Heat Capacity (Liquid)0.155J/g˚C
Thermal Conductivity20.9W/m °K
Latent Heat of Fusion49.1J/g
Coefficient Thermal Expansion0.0004/C
Volume Change (Liquid to Solid)0.7%
Casting Temperature165-195˚C
Mechanical Properties
Compressive Strength46.7MPa
Tensile Strength42.1MPa
General Properties
Gross Weight1kg

LM138 138°C Lead-Free Low-Melt Metal Moulding Alloy

LM138 is a lead-free, low-melt metal alloy with a sharp 138°C melting point and very low shrinkage, suitable for casting melt-out metal cores/mandrels for hollow composites moulding processes.

Sold in 1kg bars. Volume discounts apply.


AVAILABILITY:More than 50 availablefor immediate shipping


PRICE
€42.50ex. VAT
(€42.50 /KG)
More than 50 availablefor immediate shipping
QTY
KGS
KGS

Trade discounts

0-45-910+
€42.50€39.25€37.25
We won’t be beaten on price!

If you believe you’re buying an equivalent product cheaper elsewhere, contact us to discuss your requirements.

LM138 is a highly pure eutectic of the bismuth-tin alloy. It has a precise melting/solidification point of 138°C and exhibits very low liquid to solid volume change (+0.7%). These properties make it highly suitable as a castable, melt-out core for hollow composites moulding processes, most commonly alongside prepreg laminates. Being cadmium and lead-free, LM138 requires no special considerations in a regulated production environment.

When used in a typical lost-core process, LM138 can be reused indefinitely, making it both economical and environmentally friendly in repeated production.

Typical Uses

The most typical application for LM138 is in casting solid cores or mandrels for a ‘lost core’ moulding process. In this process, resin and reinforcement, usually in the form of prepreg, is laminated around the outside of the core before being consolidated using shrink tape or a vacuum bag. The component is then heated to a temperature sufficient to cure the resin in the prepreg but not high enough to melt the core. Once the prepreg is cured the bag or tape is removed and the temperature is increased to above the melting point of the alloy, at which point the core can be easily poured out and re-used.

Although most often to make fusible cores or inserts for use with prepregs, LM138 can also be used in other composites moulding processes including hand-layup and resin infusion, providing that the resin systems used in the process will not be damaged by being heated to the 138°C melting point of the alloy.

Due to its low melting point, very low liquid-to-solid volume change and good mechanical properties, LM138 also finds uses in thermal protection devices, as anchoring or support material and in radiation shielding.

  • Fusible core / lost core / melt-out core in composites or injection moulding
  • Work holding / anchoring and support
  • Press tools

Where a slightly lower melt-out temperature is required, we also have our LM95 low melt-alloy which has a melting point of 95°C, making it suitable for use with prepregs or processes which would not tolerate the 138°C required to melt out the core.

Composition

LM138 is the eutectic of the bismuth-tin alloy: 58% Bismuth, 42% Tin.

Physical Properties

The recommended casting temperature for LM138 is 165°C - 190°C. LM138 has a density of 8.6g/cm³ so the volume of your casting in litres should be multiplied by 8.6 to find the number of kilos of LM138 required to fill it.

LM138 has excellent ductility and good fluidity. In common with all bismuth alloys, it undergoes gradual equilibrium following solidification, exhibiting slow dimensions changes, the rate of which is dependent on post solidification treatment.

Safety Considerations

Unlike other low-melting point alloys such as 'Woods metal', LM138 does not contain harmful cadmium or lead, which offers health and regulatory advantage over other alloys. Suitable protective gloves and equipment should always be used when handling hot liquid metal.

How to Buy

LM138 is supplied in 1kg ingots. Please enter a 'Qty' for the number of kilos required. Volume discounts will be automatically applied.

Trade discounts

0-45-910+
€42.50€39.25€37.25
We won’t be beaten on price!

If you believe you’re buying an equivalent product cheaper elsewhere, contact us to discuss your requirements.

PRODUCT VIDEOS(1)

LM138 is a highly pure eutectic of the bismuth-tin alloy. It has a precise melting/solidification point of 138°C and exhibits very low liquid to solid volume change (+0.7%). These properties make it highly suitable as a castable, melt-out core for hollow composites moulding processes, most commonly alongside prepreg laminates. Being cadmium and lead-free, LM138 requires no special considerations in a regulated production environment.

When used in a typical lost-core process, LM138 can be reused indefinitely, making it both economical and environmentally friendly in repeated production.

Typical Uses

The most typical application for LM138 is in casting solid cores or mandrels for a ‘lost core’ moulding process. In this process, resin and reinforcement, usually in the form of prepreg, is laminated around the outside of the core before being consolidated using shrink tape or a vacuum bag. The component is then heated to a temperature sufficient to cure the resin in the prepreg but not high enough to melt the core. Once the prepreg is cured the bag or tape is removed and the temperature is increased to above the melting point of the alloy, at which point the core can be easily poured out and re-used.

Although most often to make fusible cores or inserts for use with prepregs, LM138 can also be used in other composites moulding processes including hand-layup and resin infusion, providing that the resin systems used in the process will not be damaged by being heated to the 138°C melting point of the alloy.

Due to its low melting point, very low liquid-to-solid volume change and good mechanical properties, LM138 also finds uses in thermal protection devices, as anchoring or support material and in radiation shielding.

  • Fusible core / lost core / melt-out core in composites or injection moulding
  • Work holding / anchoring and support
  • Press tools

Where a slightly lower melt-out temperature is required, we also have our LM95 low melt-alloy which has a melting point of 95°C, making it suitable for use with prepregs or processes which would not tolerate the 138°C required to melt out the core.

Composition

LM138 is the eutectic of the bismuth-tin alloy: 58% Bismuth, 42% Tin.

Physical Properties

The recommended casting temperature for LM138 is 165°C - 190°C. LM138 has a density of 8.6g/cm³ so the volume of your casting in litres should be multiplied by 8.6 to find the number of kilos of LM138 required to fill it.

LM138 has excellent ductility and good fluidity. In common with all bismuth alloys, it undergoes gradual equilibrium following solidification, exhibiting slow dimensions changes, the rate of which is dependent on post solidification treatment.

Safety Considerations

Unlike other low-melting point alloys such as 'Woods metal', LM138 does not contain harmful cadmium or lead, which offers health and regulatory advantage over other alloys. Suitable protective gloves and equipment should always be used when handling hot liquid metal.

How to Buy

LM138 is supplied in 1kg ingots. Please enter a 'Qty' for the number of kilos required. Volume discounts will be automatically applied.

Downloads (2)

Safety DataSheet (SDS)226 KB
Technical DataSheet (TDS)283 KB

Specification

Weight and Dimensions
Density8.6g/cm³
Product Data
Brinell Hardness22
Electrical Resistivity59.071.4 mΩ.cm
Thermal Properties
Melting/Solidification Point138°C
Specific Heat Capacity0.167J/g˚C
Specific Heat Capacity (Liquid)0.155J/g˚C
Thermal Conductivity20.9W/m °K
Latent Heat of Fusion49.1J/g
Coefficient Thermal Expansion0.0004/C
Volume Change (Liquid to Solid)0.7%
Casting Temperature165-195˚C
Mechanical Properties
Compressive Strength46.7MPa
Tensile Strength42.1MPa
General Properties
Gross Weight1kg
Can’t find the answer you’re looking for?Ask our technical team a question.

The ingot measures 30cm in length, 3cm in width and 2cm in height.

ASK YOUR OWN QUESTION

Note: Your name will be abbreviated and your email address will only be used to email you the answer directly

Note: Your name will be abbreviated and your email address will only be used to email you the answer directly

Customer Product Reviews for LM138 138°C Lead-Free Low-Melt Metal Moulding Alloy

No reviews

SUBMIT YOUR OWN PRODUCT REVIEW

We publish all reviews for verified purchases. Submit your own review and help other customers with their choices.

SUBMIT YOUR OWN PRODUCT REVIEW

We publish all reviews for verified purchases. Submit your own review and help other customers with their choices.

100% SECURE

    Secured by Digicert Payment processing by Adyen

PAYMENT METHODS

    Mastercard logo Visa logo Maestro logo Ideal logo Carte Bancaire logo Giropay logo Bancontact logo PayPal logo Bank transfer logo

Easy Composites EU B.V., registered in the Netherlands 73601195. All content copyright (C) Easy Composites Ltd, 2022. All rights reserved.