bow eye tensile test report -...

Bow Eye Tensile Test Report The EPCO bow and stern eyes are designed for mooring boats in accordance with ABTC H40.3 and are not intended for liAing boats. The tensile strength of the 304 and 316 series stainless steel used in the producFon of these products is an important consideraFon for designers when selecFng what style, diameter and material is to be used in their product. EPCO engaged the Indiana Purdue University, Fort Wayne, Indiana to conduct tests and report its findings as to the point of failure that was obtained while doing two different tests. The tests consisted of a straight pull tensile test (Figures 1 & 2) and an edge pull (Figures 3 & 4). The tests were conducted from December 28, 2012 to February 11, 2013. Tests were performed on randomly selected samples of both 304 and 316 series stainless steel bow eyes. Fixtures for each series of tests were fabricated by the university to accommodate the tensile and edge pull on the bow eyes. Copies of material cerFficaFons were provided with the test samples. TesFng was conducted on a 400,000 lb Tinius Olson machine (cerFfied calibraFon on 06032009). Figure 1 Tensile Test Figure 2 Bow Eye Tensile Failure Figure 3 Edge Pull Figure 4 Bow Eye Edge Failure

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Bow Eye Tensile Test Report

The EPCO bow and stern eyes are designed for mooring boats in accordance with ABTC H-‐40.3 and are not intended for liAing boats. The tensile strength of the 304 and 316 series stainless steel used in the producFon of these products is an important consideraFon for designers when selecFng what style, diameter and material is to be used in their product.

EPCO engaged the Indiana Purdue University, Fort Wayne, Indiana to conduct tests and report its findings as to the point of failure that was obtained while doing two different tests. The tests consisted of a straight pull tensile test (Figures 1 & 2) and an edge pull (Figures 3 & 4). The tests were conducted from December 28, 2012 to February 11, 2013.

Tests were performed on randomly selected samples of both 304 and 316 series stainless steel bow eyes. Fixtures for each series of tests were fabricated by the university to accommodate the tensile and edge pull on the bow eyes. Copies of material cerFficaFons were provided with the test samples. TesFng was conducted on a 400,000 lb Tinius Olson machine (cerFfied calibraFon on 06-‐03-‐2009).

Figure 1 Tensile Test Figure 2 Bow Eye Tensile Failure

Figure 3 Edge Pull Figure 4 Bow Eye Edge Failure

Page 2: Bow Eye Tensile Test Report - …for$liAing$boats.$The$tensile$strength$of$the$304$and$316$series$stainless$steel$used$in$the$producFon$of$ ... Bow Eye Tensile Test Report Author:

The representaFve sample products of the 304 and 316 series stainless steel that were tested were EPCO part numbers: 151 (.625” diameter – cut thread)

113 (.500” diameter – cut thread)

164 (.446” diameter – rolled thread)

123 (.331” diameter – rolled thread)

Failure Loads for Bow Eyes

Tensile (lbs) TYPE 151 113 164 123 304 50600 30704 32000 17690 316 47400 25700 30200 17760Edge (lbs) TYPE 151 113 164 123 304 20400 18600 11190 10940 316 18570 14990 14340 10630

Test Results cerFfied by:Iskander Hack, PEDepartment Chair,Mechanical and Structural Engineering TechnologyPE 19500056

IPFWIndiana University/Purdue University2101 E. Coliseum Blvd.Fort Wayne, IN 46805-‐1499260-‐481-‐6812

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