STAINLESS STEEL FASTENERS
***GENERAL REWRITE – PLEASE READ CAREFULLY.***
GENERAL
This IM covers the approval process to supply stainless steel fasteners to Iowa DOT projects and the method to inspect, sample and test stainless steel fasteners for acceptance. The requirements for stainless steel fasteners can be found in standard specification 4187. Stainless steel fasteners shall also comply with the Buy America requirements of IM 107. Approved sources of stainless steel fasteners can be found in the Materials Approved Products Listing Enterprise (MAPLE).
MANUFACTURING MILL APPROVAL
Prior to furnishing stainless steel fasteners on a certification basis, the following documents shall be submitted:
1. A request shall be submitted to Central Construction and Materials Office in Ames, Iowa detailing the location of the manufacturing plant and any distribution center(s).
2. Quality control plan/procedures the company has established to ensure material quality and identity through the manufacturing process as well as quality control testing.
3. A typical example of certification documents the mill will furnish.
4. Copy of an identification list, invoice or bill of materials providing the information identified in the Certification Procedures.
Upon satisfactory review of this application, the manufacturing mill will be placed on the approved list in Appendix A.
CERTIFICATION PROCEDURES
· The manufacturer of stainless steel bolts, nuts and washers shall furnish an identification list, invoice or bill of loading for each shipment to each project. It shall show the project, design number, heat number, hardness, tensile and yield strengths, proof load, rotational capacity test results, source and number and weight of pieces in the shipment and contain a certification statement indicating the attached mill test reports and certifications represent the itemized material.
· The signed mill test reports/certification shall include the chemical and heat analyses, and type for each heat.
· The signed mill test reports/certification shall also include a statement indicating the steel meets the requirements of IM 107, Group 1, Buy America.
A copy of these documents is required for each shipment to a project and shall be provided to the Project Engineer responsible for project administration.
Acceptance of stainless steel bolts, studs, rods, hex cap screws, nuts and washers will be based on complying verification test samples and certification documentation as indicated above.
Approved sources of stainless steel fasteners are found in IM 453.07 Appendix A.
VERIFICATION SAMPLING & TESTING
Stainless Steel Fasteners (Bolt, Nut & Washer)
|
Bolts |
Nuts & Washers |
||
|
No. of Pieces in a Production Lot |
Min. No. Sampled & Tested |
No. of Pieces in a Production Lot |
Min. No. Sampled & Tested |
|
800 and under |
1 |
800 and under |
1 |
|
801 to 8,000 |
2 |
801 to 8,000 |
2 |
|
8,001 to 35,000 |
3 |
8,001 to 22,000 |
3 |
|
35,001 to 150,000 |
8 |
Over 22,000 |
5 |
|
150,001 and Over |
13 |
|
|
A copy of the Manufacturer-Certified Test Report, Mill Test Report, and rotational capacity test must be forwarded with the sample as appropriate.