美国采购需求：因科乃尔合金、哈氏合金、Inconel 718、Invar 36、Haynes 188、蒙乃尔合金

I'm looking to receive a quote for several solid rod products made from a specific grade of corrosion-resistant alloy. The requirements include rods with different diameters and lengths: one set needs to be 30 feet long with a diameter of 1/2 inch, another set 40 feet long with a diameter of 5/8 inch, and the last set should be 30 feet long with a diameter of 3/4 inch. Please provide the pricing details for these items, including lead times and any bulk order discounts available. Additionally, let me know about your quality assurance processes and whether you can supply certification for the materials. This information will help in making a well-informed decision for the procurement.