Far-reaching efficiency.

Transcription

1 Steel Far-reaching efficiency. The new XABO Achieving new heights in lightweight heavy-duty construction for special vehicles.

2 With a minimum yield strength of 1,300 megapascals, the quenched and tempered fine-grain structural steel XABO 1300 is predestined for handling heavy loads. For towing vehicles, mobile cranes, lifting equipment or mining machinery: wherever you use XABO 1300, you can count on highest performance and economic efficiency.

3 The advantages of XABO XABO Greater load capacity. Lower weight. Reduced operating costs. Thanks to optimized temperature control during rolling and heat treatment, the new XABO 1300 reaches tensile strengths of 1,400 to 1,700 megapascals a level of performance that is more than a match for the most extreme heavy-duty applications. Reduce plate thickness by 73 % With its extremely fine microstructure, this new steel can be used in reduced plate thicknesses as much as 73 % lower than conventional steels with absolutely no compromise on strength. This reduces not only manufacturing costs, but also the operating costs of the final product.

4 4 Make the most of your structures: XABO General information on processing Before using for the first time we recommend you to consult the steel manufacturer for advice based on their available processing experience. The information below deals with general points only. The guidelines of STAHL-EISEN Werkstoffblatt 088 (weldable fine-grain structural steel, guidelines for processing, particularly fusion welding) provide general information on processing which is essentially also applicable to XABO Information on welding can also be found in DIN EN 1011 Parts 1 and 2 Welding, welding recommendations for metallic materials. Please note that temperatures above 200 C should be avoided when processing the steel as this would have detrimental effects on the steel s excellent mechanical properties. Cold forming The steel is generally processed by cold forming. Subsequent heat treatment to remove effects of strain hardening such as reduced toughness should be carried out at temperatures below 200 C. Minimum bending radii are listed in the table Mechanical properties. Hot forming Hot forming is generally possible. However it removes the original heat-treated state. After hot forming, heat treatment should be repeated to restore the original state. Heat treatment The steel acquires the required properties generally by conventional hardening and tempering, i. e. austenitizing followed by quenching and tempering. Direct hardening and tempering after rolling is equivalent to conventional quenching and tempering according to DIN EN The heat treatment parameters are determined by chemical composition and plate thickness. Consult the steel manufacturer for information on this.

5 Processing information for the new XABO

6 6 Mechanical properties Test direction in rolling direction Plate thickness Yield strength Tensile strength Elongation Notch impact energy Bending radius 1) t [mm] R e [MPa] R m [MPa] A [%] A v 27 J at r i [mm] Steel grade XABO ) 1,300 1,400 1, C 4.5 t 1) Bending line parallel to rolling direction 2) Further thicknesses on request Chemical composition Mass fractions in ladle analysis C [%] Si [%] Mn [%] P [%] S [%] Cr [%] Mo [%] Ni [%] V [%] Steel grade XABO The steel is manufactured with a fine grain structure. The nitrogen is bound in nitrides.

7 Processing information for the new XABO Thermal cutting Using correct work practices the steel can be cut without difficulties. The same guidelines apply as for other unalloyed fine-grain structural steels. The surface condition of the plates has a significant effect on cutting conditions and achievable cut quality. When there are stringent requirements on cut quality the top and bottom sides of the plate must be cleaned in the cutting area to remove scale, rust and dirt. At plate temperatures below 5 C and if the cut edges are to be subsequently cold formed, preheating to around 150 C is recommended. Special mill grades are supplied subject to the special conditions of thyssenkrupp. Other delivery conditions not specified here will be based on the applicable specifications. The specifications used will be those valid on the date of issue of this brochure. General note All statements as to the properties or util i- za tion of materials and products are for the purposes of description only. Guarantees in respect of the existence of certain properties or utilization of materials are only valid if agreed upon in writing. Welding The steel is suitable for manual and automatic welding provided the general rules of the art are followed. Manual metal arc welding and gas metal arc welding are the preferred methods. Depending on plate thickness, hydrogen content of the filler metal and heat input, preheating may be necessary. The recommendations of STAHL-EISEN-Werkstoffblatt 088 should be observed. The interpass temperature should not exceed 200 C. Please note that when using currently available filler metals it cannot be ensured that the strength properties of the weld will match those of the base metal. Either welding wire G Mn4Ni2.5CrMo or the lower-strength G Mn4Ni2CrMo specified by DIN EN ISO is recommended. In order to avoid cold cracks, only filler metals should be used that in combination with the base metal produce a weld with a very low hydrogen content. It must also be ensured that the cooling rate in the weld region is in the recommended range. This is controlled by the t 8 / 5 cooling time, with the recommended time window for XABO 1300 being between 7 s and 20 s. More information on request. To ensure that the steel s properties are not impaired by thermal stresses during welding, it is necessary to limit the maximum and minimum heat input. The heat input used will depend on the welding method, plate thickness, preheat temperature, weld shape and the requirements laid down for the welded structure.

8 Steel thyssenkrupp Steel Europe AG Kaiser-Wilhelm-Strasse Duisburg, Germany Technical Customer Service P: F: Issue March 2016 Order no.1099