Standard Q690, Q690 technical parameters

Standard Q690, Q690 price, Q690 technical parameters, Q690 hardness, Q690 cutting, Q690 Q690 welding chemical composition, mechanical properties, Q690 yield strength, tensile strength, Q690 hardness, impact energy, Q690 Q690 series material standards of professional supply steel: Q690C , Q690D, Q690E, Q690Z15, Q690Z35 quality assurance, complete spot size, more information, call 18614958688 Zhang (QQ1419646007) mechanical properties of Q690 yield requirements are as follows: ≤16mm: ≥690; 16-40mm: ≥670; 40-63mm: ≥660 ; 63-80mm: ≥640. Tensile strength: 730-940. Elongation: ≥14. Impact test: -20 ℃: ≥47. Thickness yield strength (mpa) Tensile strength (mpa) ≤16mm ≥690 730-940 16-40mm ≥670 730-940 40-63mm ≥660 730-940 63-80mm ≥640 730-940 Q690 as a high-strength structural steel plate its mechanical performance is far higher than ordinary steel shipped. ... According to the American Welding Society standards AWSD1 material properties 1 / D1 1M Table 4. 9 enumerated in quenched and tempered steel ASTM A514 / A709 Gr 100 or equivalent level of Corus PQT 701, with its minimum yield strength can reach 690 MPa; When the thickness exceeds 65 mm yield strength of 620/630 MPa, elongation can reach 16% to 18%. Q690 high yield strength, rolling difficult, Q690 are low alloy high strength steel, Table 1 GB and Japan, Europe and the United States the same level of the chemical composition of the steel table. Table 1 grade quality grade chemical composition (mass fraction)% Q690 C Si Mn SP Nb V Ti Cr Ni Cu N Mo B Als no more than no less than C 0.18 0.60 2.00 0.030 0.030 0.11 0.12 0.20 1.00 0.80 0.80 0.015 0.30 0.004 0.015 D 0.030 0.025 Frequently Asked Questions E 0.025 0.020 S700MC 0.12 0.60 2.10 0.015 0.025 0.09 0.20 0.22 0.50 0.005 0.015 WEL-TEN780 0.05 0.44 1.35 0.18 2.52 0.54 a, Q690 material performance standards, the level of classification; 1.Q690 steel material implementation of standards: GB / T1591 (GB / T3274). Table 2 GB and Japan to Europe with the mechanical properties of the steel grade comparison table. Table 2 Grade Yield strength (MPa) (<16mm) Tensile strength (MPa) (<40mm) Elongation% (<40mm) impact absorption energy (Kv / J) (- 20CO) Q690> 690 770 ~ 940> 14> 47 S700MC> 700 750 ~ 950> 12 WEL-TEN780 740 830 24 96 According to Table 2, the performance index is determined with reference to the development Q690 GB \ T1591-2008. Namely: yield strength (MPa) Tensile strength (MPa) Elongation (%) impact absorption energy (Kv / J -20CO)> 690 770 ~ 940> 14> 47 Q690 developments in other mills Q690 high yield strength, rolling difficult, now able to produce and relatively large production scale steel mills Jinan Iron and Steel, Wuhan Iron and Steel, Nanjing Steel, Baosteel, Wugang. HSLA steel plate market Jigang highest market share. Currently the vast majority belong to Q690 heavy plate products, the traditional production process offline quenching, a direct quenching and tempering process and off-line quenching process, the former has a lower production and capital costs, and to the plate to improve performance advantage, it has become the important technological fields outside companies to develop high-strength steel plate products widely concerned, the table below for the major steel mills use a high level of direct quenching equipment imported plate rolling production line with the product level. 6. widely Q690 steel with high yield strength and tensile strength, are widely used in mining machinery, engineering machinery. Such as hydraulic support, port cranes, flatbed trucks and the like. Mainly used where high tensile strength, high yield places, such as mining and construction of various projects with the rig, lifting gear, oil derrick, hydraulic support, shovel, electric wheel dump trucks, loaders, bulldozers, various types of cranes Engineering car ,, large excavators, offshore drilling platforms, mining equipment.