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Ensuring the Mill Test Report (MTR) aligns with the specific year-version of the standard. Conclusion astm a564 pdf
The most recognizable grades within the ASTM A564 specification are the "17-4 PH" and "15-5 PH" varieties. 1. Type 630 (17-4 PH) To conclude this guide, here is your exact
| Grade (UNS) | Condition | Tensile Strength (min, ksi) | Yield Strength (min, ksi) | Hardness (HRC) | |-------------|-----------|----------------------------|--------------------------|----------------| | S17400 (17-4 PH) | H900 | 190 | 170 | 40–47 | | S17400 (17-4 PH) | H1025 | 155 | 145 | 35–44 | | S17700 (17-7 PH) | RH950 | 200 | 185 | 43–48 | | S15500 (15-5 PH) | H925 | 170 | 155 | 39–45 | Type 630 (17-4 PH) | Grade (UNS) |
The "story" of A564 is the story of how metallurgists solved a century-old problem: Stainless steel (like 304 or 316) is corrosion-resistant but often too soft for heavy load-bearing applications. High-strength steels are hard but rust easily. ASTM A564 covers the alloys that bridge this gap. They are corrosion-resistant like stainless steel but strong enough to be used in landing gear and nuclear reactors.