attachment_5_bid_3061_26_blade specs.pdf

This document contains technical specifications for flexible and rigid carbide-tipped snow plow blades issued by the New Hampshire Department of Transportation (NHDOT). The specifications detail requirements for flexible plow blade equipment including individual steel segments encased in rubber with steel bushings, tungsten carbide inserts, curb runner guards, and adapter blades, with finished blades measuring approximately 7/8" thick by 6" wide and weighing 9.75 lbs. per foot. Key components include high shock resistant tungsten carbide inserts with specific gravity requirements of 14.35 to 14.6, hardness specifications of 87.5-88.8 Rockwell A, and detailed braze composition requirements including copper/silver, nickel, and other materials. The document also specifies rubber matrix properties, curb runner guard specifications using 1060 Grade Steel, and comprehensive painting requirements for road salt and abrasion resistance.

All bidders must submit certificates of analysis for carbide inserts and rubber matrix materials with their bids, and random samples will be selected after delivery for metallurgical testing to ensure compliance. Shop drawings require NHDOT Highway Maintenance approval prior to manufacture, and the vendor must guarantee the finished product for 30 months after acceptance by the Department, with specific warranty provisions for blade sections with 25% or more wear. The specifications include detailed dimensional tolerances, material chemistry requirements, and manufacturing standards, with provisions for both flexible and rigid carbide blade configurations as well as complete plow setup kits including hardware, bolts, washers, and curb runners.