Prototype tool & modeling

REN Shape 450 is the preferred modeling board for pattern makers throughout the world. The outstanding dimensional stability and its ability to hold precise tolerances even after exposure to heat have also made this material a favorite of thermoformers for prototype applications. REN Shape 450 is easily hand-carved or CNC machined with minimal cutter wear. Important features include superior edge definition, low shrinkage and water absorption and good quality surface finish.

Typical Properties

ColorLight brown
Density (ρ)41 lb/ft3 [656.7 kg/m3]
Hardness65 Shore D
Flexural Strength4000 psi [27.5 Mpa]
Flexural Modulus144,000 psi [992.8 Mpa]
Compressive Strength2,800 psi [19.3 Mpa]
Compressive Modulus135,000 psi [930.7 Mpa]
Tensile Strength2,300 psi [15.8Mpa]
Glass Transition Temp205°F [96.1°C]
Coefficient of Thermal Expansion (CTE)36 x 10-6 in/in°F [64 x 10-6 m/m/°C]

Available Sizes

2” x 20” x 60” (51mm x 508mm x 1524mm)
3” x 20” x 60” (76.4mm x 508mm x 1524mm)
4” x 20” x 60” (101.6mm x 508mm x 1524mm)
2” x 24” x 60” (51mm x 610mm x 1524mm)
3” x 24” x 60” (76.4mm x 610mm x 1524mm)


REN-Weld 103


Cutters: Roughing – 1”(25.4mm) Hog Ball End Mill, 4-flute, HS Steel 8% Cobalt
Finishing – 5/8”(15.875mm) Ball End Mill, 2-flute carbide
Depth: Roughing – varied from ¼”(6.35mm) to 2.5”(63.5mm) with 40% stepover
Finishing: 1/8”(3.175mm)deep leaving 0.002” (0.050mm) scallop height

Roughing speed: 2000RPM ∙ Roughing Feed 100IPM
Finishing speed: 15,000RPM ∙ Finishing feed 200IPM


Do not use/handle this product until the MSDS has been read and understood.


REN 450 applications may include temporary or throw-away master molds, styling and visual models, prototypes and prototype foundry patterns, vacuum form molds, architectural and automotive die models, tooling aids and fixtures and other applications requiring fast machining and good model surfaces.