SAE 8620 vs EN353 vs 20MnCr5: Case-Hardening Steels Compared Short answer: SAE 8620, EN353 and 20MnCr5 are all low-carbon (about 0.2% C) case-hardening steels : carburised and hardened, each gives a hard, wear-resistant surface of about 58–62 HRC over a tougher... Nov 5, 2026
EN19 / 42CrMo4 Equivalent in India: 709M40, AISI 4140, SCM440 and IS 40Cr4Mo3 Short answer: EN19 is a 1% chromium, 0.2–0.3% molybdenum alloy steel with about 0.4% carbon. Its current BS 970 code is 709M40 , the European name is 42CrMo4 (material no. 1.7225), the American is AIS... Nov 5, 2026
EN24 vs EN19 vs EN8: Differences, Strength and Which to Use Short answer: EN8, EN19 and EN24 all contain about 0.40% carbon ; the difference is the alloying. EN8 is plain carbon steel, EN19 adds chromium and molybdenum, and EN24 adds nickel on top. Each step u... Oct 12, 2026
Mill Test Certificate (MTC) for Steel: How to Read and Check One Short answer: A mill test certificate (MTC) is the steel mill's record of what is actually in the steel you bought: the heat number , the grade and standard , the chemical composition and, where teste... Oct 12, 2026
BS 970 Steel Codes Explained: What 817M40, 832M13 and 735A51 Mean Short answer: A BS 970 code such as 817M40 describes the steel in six characters. The first three digits give the steel type or alloy family, the letter says how it is specified (A = analysis, M = mec... Oct 8, 2026
Hardness of Alloy Steels in HRC: EN24, EN47, SAE 8620, EN353 and EN36C Short answer: Alloy steel bars are supplied soft so they can be machined, and only reach working hardness after heat treatment. Annealed EN24 and EN47 are at most 248 HB (about 24 HRC) . Hardened and ... Oct 7, 2026
Alloy Steel Equivalent Grades in India: EN, BS 970, DIN, AISI, JIS and IS Chart Short answer: The same alloy steel is sold under different names depending on the standard. EN24 is also 817M40 , 34CrNiMo6 , AISI 4340 and SNCM439 ; EN19 is 709M40 , 42CrMo4 and AISI 4140 ; EN47 is 7... Oct 7, 2026
EN47 (51CrV4) Spring Steel: Equivalents, Sizes and Uses in India EN47 is 51CrV4 chromium-vanadium spring steel. Its Indian equivalent, other designations, why it is bought annealed, and where it is used. Sep 29, 2026
EN36A vs EN36B vs EN36C (655M13 vs 832M13): Differences Explained EN36A and EN36B are 655M13; EN36C is 832M13 with added molybdenum. What that changes, the equivalents, and which one to buy. Sep 29, 2026
Sai International EN24 vs EN24T (817M40 vs 817M40T): What the “T” Means EN24 and EN24T are the same 817M40 steel — the difference is heat treatment. What the T condition means, and whether to buy annealed or EN24T. Sep 24, 2026
