Sigma Labs

Sigma Labs

Since 1987 Sigma Labs has provided physical and mechanical testing of composite materials in accordance with industry-standard test methods, including ASTM, ISO, ABS, DNV, USCG and RTP. Sigma Labs also works closely with customers on custom test methods. Sigma Labs is ISO 9001:2015 registered, serving a wide range of industries.

Industry Standard & Custom Testing:

Mechanical Properties
– 3 and 4 point Flexure, Tensile, Compression, Shear

Physical Properties
– Heat Deflection, Accelerated Weathering

– Hot/Cold, Humidity, Salt Spray, Cryogenic, Water Bath, Impact

Resin and Gel Coat
– Hardness Ratio, Blister, Opacity/Film Cure, Fineness of Grind, Viscosity

Sigma Labs is your partner for mechanical and physical property testing.

Specialized Test Equipment:

Load Cells

  • 30-kip and 60-kip Mechanical Test Machines
  • Environmental Test Chamber for Hot/Cold Testing (-100°F to 600°F)

Specimen Preparation

  • Composite Panel Fabrication
  • Waterjet Cutting

Environmental Conditioning

  • Temperature/Humidity Chamber
  • Salt Spray Chamber
  • Cryogenic Freezer
  • Muffle Furnace
  • Water Bath

Typical ASTM Tests:

ASTM C297: Flatwise Tensile Strength
ASTM D256: Impact Resistance
ASTM D570: Water Absorption
ASTM D638: Tensile Strength / Modulus
ASTM D695: Comp. Strength / Modulus
ASTM D790: Flexural Strength
ASTM D792: Density and Specific Gravity
ASTM D953: Bearing Strength
ASTM D1781: Climbing Drum Peel
ASTM D2344: Short-Beam Shear Strength
ASTM D2471: Gel Time & Peak Exotherm
ASTM D2734: Void Content
ASTM D3039: Tensile Strength / Modulus
ASTM D3165: Single Lap Shear
ASTM D3171: Resin Content
ASTM D3846: In-Plane Shear Strength
ASTM D5229: Moisture Absorption
ASTM D5628: Drop Impact Test
ASTM D5766: Tensile Strength, Open Hole
ASTM D6272: 4-Point Flexure
ASTM D7250: Sandwich Flexure (3-Point)