Can btc1 coil replace DC04
The deep drawing properties of DC01, dc02, dc03 and DC04 are different
DC means low carbon steel cold rolled strip and sheet in DIN 1623-1 flat steel procts; DC is DIN 1623-1 flat procts of steel; Cold rolled strip and sheet of mild unalloyed steels
01, 02, 03 and 04 indicate different deep drawing performance levels. The larger the number, the better the performance
hot rolling
hot rolling is a kind of strip steel made from slab (mainly continuous casting slab) by roughing mill and finishing mill after heating. The hot steel strip from the last finishing mill is cooled to the set temperature by laminar flow, and is rolled into steel strip coil by coiler. The cooled steel strip coil can meet the different needs of users
after different finishing lines (leveling, straightening, cross cutting or longitudinal cutting, inspection, weighing, packaging and marking, etc.), the procts are made into steel plate, flat coil and longitudinal cutting steel strip. To put it simply, a billet after heating (that is, the red and hot steel in TV) is rolled several times, then cut the edge and straightened into a steel plate, which is called hot rolling
cold rolling
cold rolling: hot rolled coil is used as raw material, and then the oxide scale is removed by pickling. The finished proct is hard rolled coil. Due to the cold work hardening caused by continuous cold deformation, the strength and hardness of hard rolled coil increase, and the toughness and plasticity index decrease. Therefore, the stamping performance will deteriorate and can only be used for parts with simple deformation
roll hardening coil can be used as raw material for hot dip galvanizing plant, because annealing line is set in hot dip galvanizing line. The weight of hard rolled coil is generally 6 ~ 13.5 tons, and the hot-rolled pickling coil is rolled continuously at room temperature. The inner diameter is 610mm
proct features: because it has not been annealed, its hardness is very high (HRB is greater than 90), and its mechanical processing performance is extremely poor, so it can only carry out simple directional bending processing (perpendicular to the coiling direction) of less than 90 degrees
to put it simply, cold rolling is based on hot rolling, generally speaking, hot rolling pickling cold rolling
cold rolling is made of hot rolled plate at room temperature. Although the plate will be heated by rolling in the process, it is still called cold rolling. Due to the continuous cold rolling after hot rolling, the mechanical properties of cold rolling are poor and the hardness is too high
The mechanical properties ofsteel can be recovered only after annealing, and those without annealing are called hard rolling coil. Roll hardening coil is generally used to make procts without bending and stretching
BLD 120-240 270 40 1.40.18
DC04 120-210 270 38 1.50.18
BLD refers to qbqb408 standard, DC04 is qbqb403 standard
DC04 is the same grade material of ST14, which follows the qbqb403 standard. However, DC04 is the latest version e to the different release time of the standard. However, it should be noted that the material performance range of DC04 is larger than that of ST14, including ST14 and St15. When ST14 material is indicated in the process, DC04 can be used, but if St15 material is listed in the process card, it can be replaced, But the best alternative is to pay attention to it, or do experiments, you can consider better materials< In principle, DC04 can't be replaced by BLD. Different standards lead to different test values of mechanical properties and poor comparability. However, if comparison is necessary, BLD can be said to be equivalent to dc03 in 403 standard, which is one level lower than DC04, but the difference is not particularly large. For stamping parts with relatively simple shape and shallow drawing, replacement can be considered, However, it must be verified by trial proction. For parts with deep drawing, it is better not to use this material. Bufd, which is higher than BLD in 408 standard, can be regarded as DC04
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in addition: for those who feed in the way of zero purchase like you, it is better to make a material comparison by yourself. That is to say, if conditions permit, carry out trial punching tests on different materials for various parts, determine a material replacement standard according to your actual situation, and indicate that it can be replaced in the process card. Of course, you can also refer to the replacement standards of other stamping plants.
Tianjin xiangyuxin iron and Steel Co., Ltd
dc03 = ST13 = SPCD
DC04 = ST14 = spce = SPCD
dc05 = St15 = spcf
dc06 = ST16 = spcf
that's about it. Some mechanical properties can be replaced by the warranty!
standard: en 10139
chemical composition:
C ≤ 0.08
Mn ≤ 0.4
P ≤ 0.025
s ≤ 0.02
ALT ≥ 0.015
yield strength a MPa 130 ~ 210
tensile strength MPa not less than 270
elongation after fracture not less than 34
it is mainly used for deep drawing, a simple metal stamping part for daily necessities, For example, automotive parts and electrical parts and other procts with high ctility requirements.
A) steel for cold forming
1. Plating base plate is composed of three parts, the first part is letter "d", which represents steel plate for cold forming; The second part is the letter "C", which means that the rolling condition is cold rolling; The third part is two digit serial numbers, namely 01, 03 and 04< The first and second parts are the same as the electroplating substrate, and the third part is a two digit serial number, namely 51, 52, 53 and 54; The fourth part is the letter "d", which stands for hot plating
b) structural steel
consists of four parts, the first part is the letter "s", which represents structural steel; The second part is a three digit number, representing the specified minimum yield strength (in MPA), namely 250, 280, 300, 320, 350 and 550; The third part is the letter "g", which stands for heat treatment; The fourth part is the letter "d", which stands for hot plating.