Aerospace Stainless Steel Selection: Grade Map and Spec Boundaries
Stainless steel selection for aerospace comes down to a short list of grades — 304, 316, 321, 347, 17-4 PH, 15-5 PH, 13-8 PH, A286 and 440C — matched to strength, temperature and corrosion duty. A 2026 Stainless Shapes channel-line list confirms 13-8 PH, 15-5 PH and 17-4 PH are stocked alongside 300
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