Confirm governing project specification before substituting materials
BLD Forge Direct
Forged Flange Material Grade Guide
Material grade selection should follow the project specification and service condition. Use this guide to prepare RFQs for carbon steel, low-temperature steel, stainless steel, duplex, alloy steel and drawing-based forged components.
Summary
Material grade selection should follow the project specification and service condition. Use this guide to prepare RFQs for carbon steel, low-temperature steel, stainless steel, duplex, alloy steel and drawing-based forged components.
State service temperature, corrosion condition and impact test requirement
Match material grade with standard, pressure class and inspection documents
Attach drawings when material selection affects machining or heat treatment
Practical Checklist
Use this list before sending drawings or line items for quotation review.
Carbon steel: ASTM A105, A105N or project-specific carbon steel wording
Low-temperature steel: ASTM A350 LF2 or LF6 with impact test requirements
Stainless steel: ASTM A182 F304/F304L, F316/F316L or related grades
Duplex and super duplex: F51, F53, F55 or project-specified equivalent
Alloy steel or nickel alloy requirements when specified by the end user
Heat treatment, hardness, PMI, NDT and MTC 3.1 document requirements
Quantity, destination and whether material substitution is allowed
Common RFQ Mistakes
These points often cause repeated clarification, price revisions or document mismatch.
- Treating A105 and LF2 as interchangeable without checking temperature service
- Omitting normalized, impact test or heat treatment requirements
- Using stainless grade shorthand without confirming full ASTM wording
- Comparing prices without checking PMI and certificate scope
- Sending a material name without standard, size, class and drawing context
Send RFQ for Review
Attach drawings, standards, material grades, quantity, inspection requirements and destination details for direct review.
Send your RFQ or drawing directly to BLD Forge Direct.
Email quote@bldforgedirect.com with standard, drawing, material, quantity and inspection requirements.