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For alloys in general (including steel), unified numbering system (UNS) of ASTM International and the Society of Automotive Engineers (SAE). American steel grades : AISI/SAE steel grades standard; British Standards; International Organization for Standardization ISO/TS 4949:2016; European standards – EN 10027
The SAE steel grades system is a standard alloy numbering system (SAE J1086 – Numbering Metals and Alloys) for steel grades maintained by SAE International. In the 1930s and 1940s, the American Iron and Steel Institute (AISI) and SAE were both involved in efforts to standardize such a numbering system for steels. These efforts were similar ...
AISI grade [7] C Cr Mo Ni Others Melts at [8] Remark 1.4310 X10CrNi18-8 301 0.10 17.5 NS: 8 NS: 1420 For springs 1.4301 X5CrNi18-10 304 < 0.07 18.5 NS: 9 NS: 1450 A very common austenitic stainless steel grade 1.4307 X2CrNi18-9 304L < 0.030 18.5 NS: 9 NS: 1450 Similar to the above but not susceptible to intergranular corrosion thanks to a lower ...
UNS S17400 is ASTM grade 630, Cr-Ni 17-4PH precipitation hardened stainless steel; UNS S30400 is SAE 304, Cr/Ni 18/10, Euronorm 1.4301 stainless steel; UNS S31600 is SAE 316; UNS S31603 is 316L, a low carbon version of 316. The digits "03" were assigned since the maximum allowed carbon content is 0.03%; UNS C90300 is CDA 903
AISI / ASTM EN Weight % Cr Other elements Melts at 405 1.4000 12.0 – 14.0 — 409L ... thermal and mechanical properties are given in the table here below.
ISO 18265: "Metallic materials — Conversion of hardness values" (2013) ASTM E140-12B(2019)e1: "Standard Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, Scleroscope Hardness, and Leeb Hardness" (2019)
X46Cr13 has good workability when hot, and potential to reach high hardness of up to 56 HRC. [4] [5] It contains a moderately high carbon ratio of approximately 0.46% which gives it a good compromise between high hardness and corrosion resistance for many applications.
904L is an austenitic stainless steel.It is softer than 316L, [1] [2] and its molybdenum addition gives it superior resistance to localized attack (pitting and crevice corrosion) by chlorides and greater resistance reducing acids; in particular, its copper addition gives it useful corrosion resistance to all concentrations of sulfuric acid.