1. What are the source standards for ASTM A691's materials?
Answer:
Core referenced standards include:
ASTM A370 (Methods for Mechanical Testing of Steel Products)
ASTM A751 (Standard for Chemical Composition Analysis of Steel Products)
ASTM A941 (Terminology Definitions for Steel Products)
ASME SA-691 (ASME version technically equivalent to ASTM A691)
2. What standard is used for the chemical composition of materials?
Answer:
The chemical analysis methods in ASTM A751 are directly referenced;
Element limits refer to Table 1 of ASTM A691, but the carbon steel composition must comply with ASTM A515/A516 (Standards for Pressure Vessel Steel Plates).
3. What standards are referenced for mechanical property testing?
Answer:
Tensile test: ASTM A370 (Specimen Preparation and Testing Procedure);
Impact test: ASTM E23 (Charpy Impact Test Method);
Hardness test: ASTM E10/E18 (Brinell/Rockwell Hardness Standards).
4. What are the source standards for welding procedure qualifications (PQRs)? A:
Must comply with ASME BPVC Section IX (Welding Procedure Qualification Standard);
For welding consumables, refer to the AWS A5. series (e.g., A5.5 for low-alloy steel electrodes).
5. What additional standards are relevant to material traceability?
A:
ASTM A788/A1058 (General Testing Requirements for Steel Products);
API 5L (Standard for Line Pipe, with cross-references to some test methods);
EN 10204 3.1/3.2 (Material Certificate Types, commonly used in international projects).
