HOME PRODUCTS CONTACT HOME PIPELINE ELEMENTS HV PEINER SCREW KITS CARBON STEEL FASTENERS STAINLESS AND ACID-PROOF FASTENERS SCREWS FOR FLANGED JOINTS OTHERS TECHNICAL GUIDE PROTECTIVE COATINGS STEEL DESIGNATION ACCORDING TO EUROPEAN NORMS STRENGTH CLASSES FOR BOLTS AND SCREWS NUT STRENGTH CLASSES MATERIAL HARDNESS TESTS (BRINELL, VICKERS, ROCKWELL METHODS) HV BOLT LENGTH SELECTION CALCULATOR Calculator for selecting the length of HV PEINER screws, based on the specified clamping length. The thickness of the two washers is automatically added to the calculated value. M: - select - M12 M16 M20 M22 M24 M27 M30 M36 Clamping length: 1. Strength classes of bolts and screws Strength classes are indicated by two figures. • The first digit is the minimum tensile strength Rm in N / mm2 divided by 100 (or multiplied by 0.01 if you prefer). • The second digit is the ratio of the yield strength Re (or proof stress R0.2) to the tensile strength Rm divided by 10 (or multiplied by 0.1 if you prefer). Limit Rm = F / A where F - a tensile force A - cross sectional Example 5.8 designation class of material has a yield strength of emergency Rm = 100 MPa = 5 x 500MPa material has a yield strength of R e = 0.1 x 5 x 8 = 400 MPa The dynamometry and in accordance with the Polish Standard PN-M-82084, the following bolt strength classes are distinguished: 3.6 - (Rm [MPa] - 300; Re [MPa] - 180) - low carbon steel 4.6 - (Rm [MPa] - 400; Re [MPa] - 240) - low or medium carbon steel 4.8 - (Rm [MPa] - 400; Re [MPa] - 320) - low or medium carbon steel 5.6 - (Rm [MPa] - 500; Re [MPa] - 300) - low or medium carbon steel 5.8 - (Rm [MPa] - 500; Re [MPa] - 400) - low or medium carbon steel 6.8 - (Rm [MPa] - 600; Re [MPa] - 480) - low or medium carbon steel 8.8 - (Rm [MPa] - 800; Re [MPa] - 640) - Low carbon steel with an alloying addition (e.g. boron, manganese or chrome), hardened and tempered. Tempering temperature 425 degrees C. Medium carbon steel hardened and tempered. Tempering temperature 450 degrees C. 10.9 - (Rm [MPa] - 1000; Re [MPa] - 900) - Low carbon steel with an alloying addition (e.g. boron, manganese or chrome), hardened and tempered. Tempering temperature 340 degrees C. Medium carbon steel hardened and tempered. Tempering temperature 425 degrees C. Low carbon steel with an alloying addition (eg boron, manganese or chrome), hardened and tempered. Tempering temperature 425 degrees C. Low alloy steel (should contain at least one of the alloying elements such as chromium, nickel, molybdenum or vanadium). Tempering temperature 425 degrees C. 12.9 - (Rm [MPa] - 1200; Re [MPa] - 1080) - Low alloy steel (it should contain at least one of the alloying elements such as chromium, nickel, molybdenum or vanadium). Tempering temperature 380 degrees C. Steels for products of classes 10.9 and 12.9 should have a hardenability that ensures in the core of the threaded part of the product before tempering a structure with a martensite content of approximately 90%. 2. For bolts and screws, the designation of 4 strength classes is also used, consisting of a two-digit number and the symbol H. This designation corresponds to 10% of the Vickers hardness (HV) value of the material. Common material strength classes for this type of markings, the corresponding markings from the point above and the value of Vickers hardness (HV): --------------------------- -------------------------------------------------- -------- Strength class | Hardness (HV) | Strength class | -------------------------------------------------- ----------------------------------- 14H | 140 | 4.6, 4.8, 5.6, 5.8 | 22H | 220 | 6.6, 6.8, 6.9, 8.8 | 33H | 330 | 10.9,12.9 | 45H | 450 | 14.9 | -------------------------------------------------- ----------------------------------- Sprawdź naszą ofertę: ANSI B16.11, dennica, Kolano ANSI B16.9, Kolano EN 10253, kolano gwintowane, kolano hamburskie, Kolano L360NB, Kolano P355NH, Kołnierz ANSI B16.5, Kołnierz EN 1092-1, kołnierz płaski, kołnierz szyjkowy, łuk hamburski, nakrętki nierdzewne, nakrętki ocynkowane, rurociągi kotłowe, rurociągi kwasoodporne, rurociągi nierdzewne, rury bez szwu, śruba dwustronna, śruby DIN 931, śruby DIN 933, śruby dwustronne, śruby EN 14399, śruby hv, Trójnik DIN 2615, zaślepka okularowa, zwężka symetryczna - ZAPRASZAMY! Tworzenie stron internetowych HM sp. z o.o. www.hm.pl | hosting www.hb.pl This website uses cookies to deliver services in accordance with the Cookie Files Policy . You can define the conditions for storing or accessing cookies in your browser. By using the website, you consent to the use of cookies in accordance with the current browser settings. CLOSE