LECO Mounting Supplies
Ordering Information for Cold-Mounting Acrylics, Epoxies, and Polyesters
LECOSET 100 (Acrylic) Kits (Includes measuring scoop)
Mix 1 part liquid with 2 parts powder; 10 to 12 minutes air curing for an opaque mount (use LECOMAT™ Pressure Vessel for transparent mount).
16.9 oz (500 ml) liquid/2.2 lb. (1000 g) powder
33.8 oz. (1000 ml) liquid/4.4 lb. (2000 g) powder
101.4 oz. (3 l) liquid/13.2 lb. (6000 g) powder
Extra Large
Basic Acrylic Kit (Includes measuring scoop)
Mix 1 part liquid with 1.5 parts powder; 8 to 10 minutes air curing for an opaque pink mount.
1 pt. (473 ml) liquid/1 lb. (454 g) powder
LECOSET 7008 Kits (Acrylic)
Mix liquid with powder; 10 to 12 minutes air curing for an opaque mount.
(1000 g powder/500 ml liquid)
(2000 g powder/1000 ml liquid)
LC Epoxy (Long Cure) Kits
Mix 14 g hardener with 100 g resin; 4 to 8 hours air curing/45 minutes working time for a transparent mount; 175oF (79oC) peak cure temperature.
4.7 oz. (133 g) hardener/2 lb. (907 g) resin
1 lb. 2 oz. (508 g) hardener/8 lb. (3629 g) resin
QC Epoxy (Quick Cure) Kits
Mix 20 g hardener with 100 g resin; 30 to 60 minutes air curing/25 minutes working time for a transparent mount; 200oF (93oC) peak cure temperature.
6.4 oz. (182 g) hardener/2 lb. (907 g) resin
1 lb. 10 oz. (737 g) hardener/8 lb. (3629 g) resin
LECOSET 7000 (Polyester) Kits
Mix 2 parts liquid #1 with 1 part liquid #2 and 2 parts powder; 6 to 10 minutes air curing for an opaque mount.
(750 g powder/500 ml liquid #1/250 ml liquid #2)
(1500 g powder/1000 ml liquid #1/500 ml liquid #2)
Castolite (Polyester) Kits
Mix 4 ml hardener with 178 ml resin; 4 to 8 hours air curing for a transparent mount; 170oF to 190oF (77o to 88oC) peak cure temperature.
0.40 oz. (11.8 ml) hardener/2 lb. (908 g) resin
2.0 oz. (60 ml) hardener/9 lb. (4083 g) resin
Accessories for Cold Mounts
Spring steel sample supports, 100/pkg
Plastic sample clips, 100/pkg
Graduated paper mixing cup, 3.5 oz. (100 ml), 100/pkg
Graduated plasic mixing cup, 10 oz. (296 ml), 100/pkg
Mixing kit includes:
20 cups; 20 wooden spatulas; 1 spoon; 12 mold
cups—1 in. diameter; 12 mold cups—1.25 in. diameter
12 plastic mold cups, 1 in. diameter
12 plastic mold cups, 1.25 in. diameter
12 plastic mold cups, 1.50 in. diameter
12 plastic mold cups, 25 mm diameter
12 plastic mold cups, 30 mm diameter
12 plastic mold cups, 40 mm diameter
Ring Molds, 1.00 inch (25 mm) OD, 100/pkg
Ring Molds, 1.25 inch (32 mm) OD, 100/pkg
Ring Molds, 1.50 inch (38 mm) OD, 100/pkg
Ring Molds, 2.00 inch (51 mm) OD, 100/pkg
813-006 LECOMAT® Pressure Vessel Specifications
Dimensions: 11.5 in. H x 13.5 in. W x 13.5 in. D (29.2 x 34.3 x 34.3 cm)
Weight 10 lb. (4.5 kg)
Will hold up to ten 1.5 in. mold cups
Silicone Reusable Rubber Molds
25 mm Round (Qty. 5)
30 mm Round (Qty. 5)
32 mm Round (Qty. 5)
40 mm Round (Qty. 5)
50 mm Round (Qty. 5)
25, 30, 32, 40, 50 mm Round (Qty. 5)
70 mm x 30 mm Rectangle (Qty. 5)
100 mm x 42 mm Rectangle (Qty. 5)
1.25 in. Round (Qty. 5)
1.50 in. Round (Qty. 5)
For a complete listing of LECO's high-quality metallographic
consumables, call 1-800-292-6141 and request our
Metallographic Consumables Catalog (form no. 203-826-000), or
go to www.leco.com to download the latest catalog.
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Recommended Mounting Methods
ALUMINUM Aluminum is typically soft and can be mounted in most mounting materials. If heat is a
concern, use a castable technique to avoid compromising the microstructure of your material. LECOSET
100 or 7008 is the proper medium to select, and the LECOMAT provides a transparent mount (if desired).
BORIDES/CARBIDES These types of harder/brittle materials need special care when mounting. Epoxy
cold mounting is highly recommended because of problems with sample fracturing under the pressure of
the thermosetting process. Compression mounts can be used, but care must be taken to make sure that
all burrs have been removed. This will keep the mount flat and fractures are much less likely to occur.
CERAMICS, CERMETS The same rules apply to ceramics as the borides/carbides family. Ceramics tend to
be hard/brittle and will be damaged if mounted in a thermosetting mounting material. Epoxy cold
mounting (QC & LC Epoxy) will provide the correct abrasion resistance and excellent edge retention.
COPPER, BRASS Copper and brass are considered softer materials and acrylic cold mounting materials
(LECOSET 100) are acceptable for the majority of applications.
CIRCUIT BOARDS Small plated thru-holes must be filled so cold mount materials must be used.
Typically, acrylics are best because they provide low viscosity and quicker cure times. Circuit boards are
not extremely hard so epoxy is not needed in this case. LECOSET 100 or 7008 used in conjunction with
a pressure vessel will provide excellent results.
FERROUS MATERIALS This is a very broad category which may include soft low-carbon steels and higher
carbon steels that have been heat-treated. Ferrous materials are good candidates for thermosetting
mounting materials. Bakelite, epoxy, or even diallyl phthalate may be appropriate depending upon the
hardness of the material. Lower-carbon steels can be mounted in bakelite or an economical cold
mounting system. Harder medium and high-carbon steels should be mounted in epoxy especially when
surface defects are being investigated. Epoxy will ensure good adhesion to the sample and therefore with
good preparation techniques. It will also provide excellent sample flatness.
PRECIOUS METALS Precious metals are very soft and should be mounted in the softer mounting
materials. Bakelite and some of the cold mounting materials are excellent for mounting these alloys.
Precious metals will "dish" out or abrade away faster than the mounting material if it is harder than
needed. Usually precious metals require excessive final polishing to remove unwanted scratches, so the
mounting media should wear away almost as readily as the metal itself. Lucite thermoplastic mounting
material is excellent for these types of applications. Its clarity allows the operator to grind to a specific
area of interest.
STAINLESS STEELS Stainless steels vary quite a bit in hardness. Ferritic stainless steels such as 409 and
430 are fairly soft and can be mounted in bakelite or an economical cold mounting material. Martensitic
grades such as 410, 420, and 440C are much harder and should be mounted in epoxy thermosetting or
diallyl phthalate. Austenitic grades are usually somewhere in between and can be mounted in either
group. When surface anomalies or defects are being investigated it is always better to use the harder
mounting material if a choice is available.
TUNGSTEN ALLOYS Tungsten and other "tough" materials such as titanium and nickel alloys require
special metallographic polishing, but mounting can be done with normal thermosetting materials such as
bakelite or epoxy.
Specifications and part numbers may change.
Consult LECO for latest information.
LECO, LECOSET, LECOMAT are registered trademarks of LECO Corporation.
LECO Corporation
3000 Lakeview Avenue • St. Joseph, MI 49085 • Phone: 800-292-6141 • Fax: 269-982-8977
info@leco.com • www.leco.com • ISO-9001:2008 HQ-Q-994 • LECO is a registered trademark of LECO Corporation.
Form No. 209-011
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