316Ti stainless steel has been traditionally specified by German engineers and users with the Werkstoff number 1.4571. The former steel grade in the UK was 320S31.
316Ti stainless steel
316Ti stainless steel is essentially a standard carbon 316 with titanium stabilisation and is similar in principle to the titanium stabilisation of the 304 (1.4301) to produce 321 (1.4541). The addition of titanium is made to reduce the risk of intergranular corrosion (IC) following heating in the temperature range 425-815C.
Under most conditions it can be taken that the two grades are interchangeable, 316L (316S11/1.4404) being suitable for applications where 316Ti stainless steel (320S31/1.4571) is specified. In aqueous corrosion media or environments at ambient temperatures, there is no practical advantage in specifying 316Ti stainless steel in preference to 316L stainless steel. In some circumstances 316L (1.4404 / 1.4432) grades may be better choices.
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Tags: 316L steel, 316 steel, 304L steel
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