MAXTOUGH is a registered Crosby trademark identifying products that are statistically verified to meet or exceed impact values of 31 ft-lbs. at -4F based on a confidence level of 90%. The confidence level is an index of certainty. MAXTOUGH is another Value-Added benefit of The Crosby Group.
The mechanical properties of steel, when a load is very rapidly applied, is known as its impact strength. Impact tests are made by applying a sudden load to a test piece and measuring the energy absorbed when the specimen breaks. The tougher the material the greater the energy required to break the piece. A brittle piece can absorb virtually no energy upon breaking. The Charpy V Notched Impact test is one common method of performing the testing and measurement. Fittings must be able to have impact strengths that match the requirements of their application at all temperatures, even low temperatures commonly found in winter conditions. The difficulty of crack initiation and crack growth under impact is an important consideration.
MAXTOUGH products are statistically verified to meet or exceed specific impact values. Sample heats of steel are Charpy impact tested and statistically verified that the material meets or exceeds impact values of 31 ft.-lbs. at -4F, based on a confidence level of 90%. These tests are conducted on an ongoing basis.
The following Crosby products are rated MAXTOUGH:
| - 209 (G & S) Carbon Steel Screw Pin Anchor Shackles | - 210 (G & S) Carbon Steel Screw Pin Chain Shackles |
| - 2130 (G & S) Carbon Steel Bolt-Type Anchor Shackles | - 2150 (G & S) Carbon Steel Bolt-Type Chain Shackles |
| - 213 (G & S) Carbon Steel Round Pin Anchor Shackles | - 215 (G & S) Carbon Steel Round Pin Chain Shackles |
Crosby has an extensive test program that continually verifies that Crosby MAXTOUGH products maintain demanding design criteria.