Privacy Policy

1. Overview

Mat Grades is an open engineering reference portal. We respect your privacy and believe in transparency. This policy explains what information is processed when you visit and interact with matgrades.com.

2. Information You Choose to Provide

We do not require user accounts, passwords, payment details, or phone numbers to access material specifications, comparisons, tools, or downloads. If you choose to contact us, we collect the name, email address, subject and message you submit to handle your request. No account is required.

3. Server Logs

Like standard web servers, our hosting infrastructure may temporarily log routine technical connection requests. These logs may include IP addresses, browser user agent strings, requesting URLs, and request timestamps. These logs are used strictly for technical performance monitoring, infrastructure stability, and defending against malicious traffic or denial-of-service attempts.

4. Cookies & Local Storage

Advertising scripts are disabled during site recovery. Google Analytics loads only after you accept optional analytics. It may process device, usage and approximate location data. Rejecting analytics keeps it unloaded. Your choice is stored locally for up to 180 days and can be changed through Privacy choices in the footer. Withdrawing consent disables analytics and removes accessible Google Analytics cookies for this site. We may use browser session storage or local storage exclusively to remember user interface preferences, such as selected unit systems (SI vs. Imperial) or comparison selections.

5. Contact Messages and Retention

Contact messages are transmitted to our server over HTTPS and saved in a private support inbox outside the public website directories. We use this information to review your request and, where appropriate, reply to the email address you provide. Contact messages are not published or used for advertising.

Messages are retained for up to 30 days and deleted through scheduled daily maintenance. A short-lived rate-limit identifier may be derived from the connection address to prevent spam; it is not written to the message record. Hosting logs and restricted backups may have separate retention periods. You can request access, correction or deletion through the contact page; include your message reference so we can locate the record. Do not submit confidential or sensitive information.

6. Analytics

Google Analytics 4 is optional and is loaded only after acceptance. Analytics can process page views, device and browser details, usage events and approximate location information. Google processes this information under its own service terms and privacy policy. Advertising storage and advertising-personalization consent remain disabled in this release. Browser privacy settings and blockers may also limit collection.

7. External Links

Our catalog references external standards bodies (such as ASTM, CDA, SAE, and ISO) and publisher literature. When clicking external reference links, you are subject to the respective external website policies.

8. Questions & Policy Status

For questions regarding this privacy policy or site practices, refer to our contact page and engineering disclaimer.