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Science
Reference for steel grades: AISI, SAE, and EN standards with composition data.
Open Steel GradesScience
Sunrise, sunset, twilight phases, day length for any city and date. Free sunrise-sunset.org API.
Open Sun TimesYour specific task is reference for steel grades: aisi, sae, and en standards with composition data. Open the page, drop your input, get the result — typically under a second.
Your goal is sunrise, sunset, twilight phases, day length for any city and date. Same approach: paste in, get the result, move on. No account, no upload.
Both tools live in the same category, so the choice depends on the exact subtask. Steel Grades focuses on reference for steel grades: aisi, sae, and en standards with composition data; Sun Times focuses on sunrise, sunset, twilight phases, day length for any city and date. Try whichever description matches your goal more closely — they're both free.
Yes — both tools are free for unlimited personal use. The Pro plan unlocks higher limits and batch features but the core functionality stays free forever.
Absolutely. Many users chain multiple tools together — process a file with one, then feed the result into another. Nothing is uploaded, so chaining is essentially instant.
No. Both Steel Grades and Sun Times work without signup. We only ask for an email if you decide to subscribe to a paid plan.