Company name: Wuyang iron and Steel Co., Ltd.
Contact: Chen Jie
Cell phone number: 15617588651
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WSD690E steel plate (the technical scheme is KTZ305-2016)
1 scope of application: this technical specification specifies the size, shape, tolerances, technical requirements, test methods, inspection rules, marks and quality certificates for WSD690E steel plates with thickness of 8mm-50mm for Volvo.
The 2 grade is WSD690E., and the quality grade symbol is E, which represents -40C degree impact test temperature.
3 size • shape • weight and allowance deviation
The size, shape and allowable deviation of the 2006 steel plate shall be in accordance with the provisions of GB/T709 - 3.1.
The thickness deviation of the 3.2 steel plate shall be in accordance with the C class deviation in GB/T709-2006 6.1.3.
The weight of 3.3 steel plate is calculated according to theoretical weight. Theoretical weight the thickness of plate thickness and allow small thickness of the arithmetic mean, the density of steel 7.85g/cm fand.
4 technical requirements
The 4.1 grade and chemical analysis (melting analysis) shall conform to the provisions of table 1. Chemical composition of 1WSD690E steel (melting analysis) wt%, grade CSiMnpsvCrNiCuMoBWSD690E is less than or equal to 0.18 = 0.5 = = 0.02 1.5 = 0.01 = 0.08 = 0.8 = 1.5 = 0.5 = 0.6 = 0.005
The allowable deviation of the chemical composition of A product steel plate should comply with the provisions of GB/T2222.
B smelting carbon equivalent Ceq = 0.53%. Melting crack sensitive coefficient PCM = 0.30%.
Ceq (%) =C+Mn/6+Si/24+Ni/40+Cr/5+Mo/4+V/14 Pcm (%) =C+Si/30+Mn/20+Cu/20+Ni60+Cr/20+Mo/15+V/15+v/10+5B
4.2 smelting method should be treated by vacuum
4.3 delivery status steel plate should be quenched and tempered quenched and tempered heat treatment delivery.
4.4 the mechanical properties and technological properties of WSD690E steel plate should comply with the provisions of Table 2 in the delivery state of mechanical properties and technological properties. Table 2WSD690E Rpo.2 Rm A V thickness of Charpy impact energy of 180 DEG bending experimental thickness (Mpa) (Mpa) (%) KV2 (horizontal) /J d= bend diameter thickness -40 C a= sample thickness 8-50 = 680 770-940 = 14, d=3a = 47
A (V 47J C B steel Charpy according to table 2 there shall be no crack of cold bending test.
4.5 ultrasonic inspection steel plate should be followed by 100% JB4730.3, should comply with I class
4.6 surface quality steel plate shall not contain bubbles • scab • crack • folding • inclusion and pressed oxide scales. Steel plate shall not be layered. The steel surface allows - - Scratch indentation and other local defects of thin iron oxide rust - - does not interfere with the inspection of surface defects caused by pressing iron oxide off the rough surface, but the depth from the surface defects of steel plate steel plate allows real grinding processing, but should ensure that the small thickness, repair should be smooth without edges. 55.2 test method: each batch of steel plate inspection items • sampling quantity • sampling method and experimental method conform to the provisions of table 3.
5.3 steel plate with thickness greater than 40mmm, the impact test axis should be located at 1/4 of the plate thickness.
5.4 (Charpy V notch impact test results), does not comply with the provisions of article 4.4 of the 3 samples from the same plate and then carries on the experiment, the two groups before and after the 6 samples are only allowed to have 1 samples is less than the specified value, but does not allow for less than a prescribed value 70%.
The number of sampling test method shall comply with the provisions of GB/T17505-1998 Table 3 experimental method of inspection item sampling 1 smelting chemical analysis 1/ GB/T2006 GB/T223 of each furnace tank number GB/T4336 2 GB/T228.1 3 1/ tensile each batch of each batch of GB/T2975 GB/T232 4 1/ cold shock 3/ of each batch of GB/T229 5 / JB/T4730.3 6 by ultrasonic inspection and measurement by surface / visual 7 dimensional shape by measuring / appropriate retesting 5.5 other experimental items
6 packing / marking and quality certificate steel plate packaging and marking and quality certificate should comply with the provisions of GB/T247-2008.
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