ASTM B443 Alloy 625 Plate & Sheet, Grade 1 or Grade 2 | N06625

Shaanxi Shangyou Stainless Steel Co., Ltd. supplies astm b443 alloy 625 plate & sheet, grade 1 or grade 2 | n06625 for buyers whose primary search intent is corrosion-resistant plate and high-temperature sheet, not generic stainless or nickel-alloy stock. The page should be quoted against the selected standard edition, the equipment or component drawing and the governing design code. Nickel-chromium-molybdenum-niobium Alloy 625 flat product to ASTM B443, ordered in Grade 1 annealed or Grade 2 solution-annealed condition.

The material decision should start with service conditions. Solid-solution-strengthened nickel alloy combining high strength with resistance to pitting, crevice corrosion and many mixed corrosive environments. Grade 1 and Grade 2 are not marketing quality levels; they are different heat-treatment conditions. Select using design temperature and required properties. This comparison belongs in the enquiry stage because a higher alloy name does not automatically deliver the lowest life-cycle risk.

A complete RFQ needs product form, grade/UNS, ordered condition, dimensional basis, tolerances, quantity and inspection level. Thickness, width, length, edge, flatness and permissible weld repair must be stated. Typical market sizes are references only and are not stock commitments. For pressure-containing products, the material standard controls product quality; it does not replace pressure-design calculations, corrosion allowance or code approval.

Manufacturing and documentation must remain connected. Rolled flat product with grade-specific heat treatment, leveling and cutting. Heat/lot identity must remain traceable after cutting. The baseline verification plan is: MTC, chemistry and mechanical tests, PMI, dimensional/flatness checks and optional UT/PT or corrosion tests when specified. Any supplementary requirement—PMI extent, UT class, eddy-current acceptance, corrosion testing, grain size, roughness, cleanliness or third-party inspection—must appear in the PO before production.

Fabrication guidance: Weld with qualified nickel-alloy procedures and control dilution, cleanliness and heat input. Forming forces and springback exceed common stainless sheet. Selection boundary: Alloy 625 is highly versatile but not immune to every acid or high-temperature sulfidizing environment. Use corrosion data for the actual concentration and temperature. Buyers should provide fluid composition, maximum and minimum temperature, pressure, design life, fabrication route and applicable code so the quotation can separate mandatory requirements from optional controls.

Standards, Dimensions and Supply Definition

Material and Selection Markers

Use note: Values above are concise identification/selection markers, not a replacement for the ordered ASTM/AWS chemistry table or the MTC.

Candidate Applications

• Chemical vessels and internals.
• Offshore splash-zone components.
• Flue-gas and pollution-control equipment.
• High-temperature shields and ducting.

Buyer Decision Boundary

Grade 1 and Grade 2 are not marketing quality levels; they are different heat-treatment conditions. Select using design temperature and required properties.

Processing, Inspection and Documentation

• Manufacturing: Rolled flat product with grade-specific heat treatment, leveling and cutting. Heat/lot identity must remain traceable after cutting.
• Fabrication: Weld with qualified nickel-alloy procedures and control dilution, cleanliness and heat input. Forming forces and springback exceed common stainless sheet.
• Inspection: MTC, chemistry and mechanical tests, PMI, dimensional/flatness checks and optional UT/PT or corrosion tests when specified.
• Traceability: Keep heat/lot identity through cutting, machining, bending, welding, testing and packing.
• Documentation: Confirm MTC type, test reports, packing list, country-of-origin statement and third-party inspection before production.

RFQ Checklist

• Standard and adopted edition: ASTM B443
• Grade / UNS: Alloy 625, Grade 1 / Grade 2 / N06625
• Form and route: Plate, sheet and strip
• Dimensions, tolerances, quantity and unit basis
• Delivery/heat-treatment condition and surface/end finish
• Design code, service fluid/atmosphere, pressure and temperature
• Inspection/NDE, acceptance criteria, MTC and third-party witness points
• Marking, preservation, packing and delivery destination

Inquiry CTA

Frequently Asked Questions

1. What does ASTM B443 cover for this product? Nickel-chromium-molybdenum-niobium Alloy 625 flat product to ASTM B443, ordered in Grade 1 annealed or Grade 2 solution-annealed condition. Always purchase to the edition adopted by the contract or project specification.
2. Is this product seamless, welded, forged, rolled or drawn? The PO must state the required route exactly: Plate, sheet and strip. Do not rely on a product photograph or a family name to establish the route.
3. How should buyers select Alloy 625, Grade 1 / Grade 2? Solid-solution-strengthened nickel alloy combining high strength with resistance to pitting, crevice corrosion and many mixed corrosive environments. Grade 1 and Grade 2 are not marketing quality levels; they are different heat-treatment conditions. Select using design temperature and required properties.
4. Which dimensions must be included in the RFQ? Thickness, width, length, edge, flatness and permissible weld repair must be stated. Typical market sizes are references only and are not stock commitments. Add quantity, unit basis, tolerances and any drawing-controlled geometry.
5. What heat-treatment or delivery condition is required? Grade 1 annealed for lower-temperature corrosion service; Grade 2 solution annealed where higher-temperature creep/rupture behavior is required by design. The MTC and heat-treatment records should use the same grade and condition language as the PO.
6. Which inspection documents can be requested? MTC, chemistry and mechanical tests, PMI, dimensional/flatness checks and optional UT/PT or corrosion tests when specified. The final inspection scope must be agreed before order placement.
7. Is it suitable for the intended corrosive or high-temperature service? Alloy 625 is highly versatile but not immune to every acid or high-temperature sulfidizing environment. Use corrosion data for the actual concentration and temperature. A material engineer should approve the final choice using actual service data.
8. What fabrication issues should be addressed? Weld with qualified nickel-alloy procedures and control dilution, cleanliness and heat input. Forming forces and springback exceed common stainless sheet. Use a qualified procedure and preserve heat/lot traceability after cutting or fabrication.
9. What are typical applications? Common candidate applications include chemical vessels and internals, offshore splash-zone components, flue-gas and pollution-control equipment, high-temperature shields and ducting. These examples are not blanket design approvals.
10. What information is needed for a firm quotation? Send standard and edition, grade/UNS, form, dimensions, condition, quantity, delivery destination, inspection/NDE, documentation, packing and any third-party inspection or code requirement.