| ASTM E3 | Standard Guide for Preparation of Metallographic Specimens | Materials Testing |
| Superseded by: None | Superseded By: None | |
| Selected sector: AS | Date added: | |
| SupplierNumber | SupplierName | State | CountryName |
| 90074010 | AADFW INC | TX | United States |
| 90043790 | ATLAS TESTING LABORATORIES INC | CA | United States |
| 90049888 | DICKSON TESTING CO INC | CA | United States |
| 90043872 | ELEMENT MATERIALS TECHNOLOGY | CA | United States |
| 90051187 | Kaiser Aluminum Washington | WA | United States |
| 90070395 | LABORATORY TESTING INC | PA | United States |