REPLICAST 612 Metallic Gray Rapid Tooling Urethane
DESCRIPTION
REPLICAST
612 is a two-component, filled urethane tooling material that has very
easy handling characteristics and exceptional cured properties. This
material tends to have less hard-pack settling in storage, and therefore
is usually easier to use than other materials of this type, which tend
to settle more rapidly. It is not extremely abrasive, so it can be
machined with the proper cutters if desired. REPLICAST 612 has a
one-to-one mix ratio by weight or volume for fast measuring and mixing.
It has a longer pot life than earlier materials of this type, yet it
cures rapidly and can be demolded and put into service quickly.
REPLICAST 112 has a lower exotherm during cure than our REPLICAST 609,
and therefore lower shrinkage in thicker castings. REPLICAST 612 is the
better choice for thicker castings when the lowest shrinkage is
required. REPLICAST 612 provides and easy to measure and mix, rapid
curing system that has tough cured properties and very good heat
resistance. It is an excellent choice for patterns, tooling, fixtures
and general shop aids.
REPLICAST 612 offers the following benefits:
– Less hard-pack filler settling
– Low exoterm during cure for stress-free castings
– Smooth consistency that pours well & duplicates details nicely
– Very good hot strength
– Excellent for medium to larger casts
– Low shrinkage, good cured stability
HANDLING & CURING
REPLICAST 612 is very similar to other REPLICAST products that have
been on the market for quite some time. However, REPLICAST 612 offers
certain advantages over previous products of this type that make it very
attractive for use in a variety of applications. It has a longer
working time to allow easier preparation and pouring of complicated
castings, yet it cures quite rapidly, so it can be demolded in a short
time. The exact demold time will depend upon the shop conditions and
size of the casting. Generally, most castings can be demolded in 30 to
40 minutes, depending on size, and can be put into service shortly after
that. Very thin casts, and those made in very cold shop environments
should be carefully checked for hardness and degree of cure before
demolding, to avoid distortion of the casting. REPLICAST 609 is a better
choice for thin-section and small castings, as it gels and cures faster
in these instances. REPLICAST 612 is a highly filled system, and as
such, both components should be checked for settling before making a
casting. REPLICAST 612 usually has less hard-pack settling than other
products of this type. However, all filled casting systems have the
potential to settle in some manner when stored for long periods, so the
REPLICAST resin and hardener should be thoroughly stirred before use to
insure original manufactured uniformity.
TYPICAL MECHANICAL PROPERTIES
REPLICAST 612 A/B | ASTM Method | |
Mix Ratio, by Weight | 100 : 100 | PTM&W |
Color | Metallic Gray | Visual |
Mixed Viscosity, @ 77°F | 2600 cps | D2393 |
Working Time, 4 fl. oz. Mass @ 77°F | 10 min. | D2471 |
Peak Exotherm, 20 lb. Mass. Cast 2 ½” Thick | 130°F | D2471 |
Cured Hardness, @ RT, @ 150°F | 84 D, 80 D | D638 |
Shrinkage, in./in., Mold # 3, Vol: 1.23 Gal 10″ Long x 4.5 ” Deep | .0027 | D2566 |
Specific Gravity, grams, cc | 1.71 | D1475 |
Density, lb./cu. inch | .0618 | D792 |
Specific Volume, cu. in./lb. | 16.19 | D792 |
Tensile Strength, psi | 4500 psi | D638 |
Elongation @ Break, % | 2.00 % | D638 |
Flexural Strength, psi | 6900 psi | D790 |
Compressive Strength, psi | 9100 psi | D695 |
PACKAGING INFORMATION
REPLICAST 612 | Gallon Kit | Kit Volume | |
Gallons | Cubic Inches | ||
Part A | 9 lb. | .62 | 144 |
Part B | 9 lb. | .64 | 147 |
Kit | 18 lb. | 1.26 | 291 |