Stainless steel duplex stainless steels are achieved with an overall lower alloy content than similar-performing super-austenitic grades, making their use cost-effective for many applications. Duplex grades are characterized into groups based on their alloy content and corrosion resistance. Precipitation hardening stainless steels have corrosion resistance comparable to austenitic varieties, but can be precipitation hardened to even higher strengths than the other martensitic grades. The most common, 17-4PH, uses about 17% chromium and 4% nickel. The designation "CRES" is used in various industries to refer to corrosion-resistant steel. Most mentions of CRES refer to stainless steel, although the correspondence is not absolute, because
The Stainless Steel Rat the past to 1975, making events happen in and around 34,573 (in the 346th century) – although Professor Coypu also mentions that they are now using a different calendar to the Gregorian calendar. Specifics of the new calendar are never mentioned. "The Stainless Steel Rat", "The Stainless Steel Rat Saves the World" and "The Stainless Steel Rat for President" were adapted into comic strip form in early issues of "2000 AD", written by Kelvin Gosnell and drawn by Carlos Ezquerra. Ezquerra drew Jim with an appearance modelled on the actor James Coburn. They appeared in the following issues of "2000