Shasan Piping Solution is a well-known trader and manufacturer of carbon steel ASTM A420 butt weld fittings and can consider suitable alloys as an alternative to more expensive titanium or nickel based alloys. ASTM 420 short radius carbon steel pipe fittings also exhibit excellent resistance to sulfide stress corrosion cracking in acid gas environments. https://www.shasanpiping.com/carbon-steel-astm-a420-buttweld-fittings-manufacturers-exporters-suppliers-stockists.html