The product name specification material steel factory/origin price (yuan/ton) is Φ6.5mm higher than yesterday's last week. General line Φ6.5mm Q235 Handan Steel 5090 0 50 -20 Common line Φ8mm Q235 Handan Steel 5090 0 60 -20 Common line Φ10mm Q235 韶Steel 5090 0 10 -20 High Line Φ6.5mm Q235 Steel 5100 0 20 -20 High Line Φ6.5mm Q235 High-Performance Steel 5120 0 40 -10 High Line Φ6.5mm Q335 North Station 5050 0 30 -40 High Line Φ6.5mm Q335 Pinggang 5080 0 20 -50 Rebar Φ12mm HRB335 Masteel 5440 0 100 50 Rebar Φ12mm HRB335 Tangsteel 5440 0 100 50 Rebar Φ18-25mm HRB335 Masteel 5250 0 90 60 Rebar Φ16-25mm HRB335 Tangsteel 5250 0 110 70 Rebar Φ18-25mm HRB335 Liugang 5240 0 80 40 Rebar Φ18-25mm HRB335 Pinggang 5280 0 70 50 Rebar Φ18-25mm HRB335 Jianlong 5150 0 80 10 Rebar Φ18-25mm HRB335 Shougang 5150 0 80 10 Rebar Φ16-25mm HRB335 新抚5150 0 60 10 Rebar Φ16-25mm HRB335 钢钢5290 0 90 80 Thread steel Φ12mm HRB335 韶钢5530 0 80 10 Thread steel Φ14mm HRB335 韶钢5390 0 80 50 Thread steel Φ16mm HRB335 韶钢5300 0 90 20 Rebar Φ18-25mm HRB335 Rebar 5270 0 50 40 Rebar Φ16-25mm HRB335 Yufeng 52 00 0 80 10 Rebar Φ16-25mm HRB335 Cold-reinforced steel 5270 0 70 40 Rebar Φ16-25mm HRB335 Wanxin 5190 0 40 -10 Grade III rebar Φ12mm HRB400 Masteel 5520 0 70 40 Grade III rebar Φ14mm HRB400 Masteel 5520 0 70 40 Class III Rebar Φ16-25mm HRB400 Magang 5450 0 110 70 Class III Rebar Φ16-25mm HRB400 Handan Steel 5450 0 90 -50 Class III Rebar Φ16-25mm HRB400 Guangzhou Steel 5520 0 70 -80 Class III Thread Steel Φ18-25mm HRB400 Tangsteel 5450 0 110 100 Grade III Rebar Φ18-Φ25mm HRB400 Pinggang 5450 0 100 70 Hot Roll 2.75mm*1250*C Q235 Tong Steel 5650 0 20 0 Hot Roll 2.75mm*1250*C Q235 Bead Steel 5680 0 30 30 Hot rolled coil 2.75mm*1250*C Q235 Handan Steel 5680 0 30 30 Hot rolled coil 2.75mm*1250*C Q235 Tangsteel 5650 0 20 0 Hot rolled coil 3.0mm*1250*C Q235 Angang /Shandong Iron & Steel 5650 0 50 50 Hot Roll 3mm*1500*C Q235 Tang Steel 5600 0 50 0 Hot Roll 4.75mm*1500*C Q235 Tang Steel 5400 0 0 50 Hot Roll 4.75mm*1500*C Q235 Steel 5400 0 0 50 Hot rolled coil 5.5mm*1500*C Q235 Tangsteel 5400 0 0 50 Hot rolled coil 5.75mm*1500*C Q235 Liugang 5400 0 0 50 Hot rolled coil 5.75mm*1500*C Q235 Angang Steel 5400 0 0 50 Hot rolled coil 5.75mm*150 0*C Q235 Masteel 5600 0 0 100 Hot rolled coil 7.5mm*1500*C Q235 Benxi Steel 5400 0 0 50 Hot rolled coil 7.5mm*1500*C Q235 Tangsteel 5400 0 0 50 Hot rolled coil 11.5*1500*C Q235 Tang Steel 5400 0 0 50 Strip 183-232mm*2.5 DF01 Steel 5200 0 120 120 Strip 295-355mm*2.5 DF01 Ruifeng 5220 0 140 140 Strip 295-352mm*2.5 Q195L Tangshan Jianlong 5110 0 110 130 Strip 275mm*2.5 Q195L Radon 5170 0 80 90 Strip 240-255mm*2.5 Q195 Steel 5030 0 80 50 Strip 255mm*2.5 Q235 Tianjin Roll 5280 0 230 270 Strip 352mm*2.75 Q235 Tangsteel 5130 0 110 80 Strip 434mm*3.0 Q235 Tangshan Steel 5130 0 110 200 Strip 680-720mm*5.0 HG5 Beitai 5220 0 120 120 Strip 438-520mm*2.75 HG5 Xingye 5220 0 190 170 Strip 680-735mm*5.0 HG5 Tingtin 5110 0 110 110 Strip 505-700mm*2.75 HG5 Vertical and horizontal 5380 0 130 100 Cold rolled coil 1.0mm*1250*2500 SPCC Angang 6550 0 0 0 Cold rolled coil 1.2mm*1250*2500 ST12 Angang 6550 0 0 0 Cold rolled Roll 2.0mm*1250*2500 ST12/DC01 Angang 6550 0 0 0 Cold rolled coil 3.0mm*1250*2500 ST12/DC01 Angang 6550 0 0 0 Cold rolled coil 1.0mm*1500*C SPCC Benxi Steel 6480 0 0 -20 Cold rolled coil 1.0*1250*2500 SPCC 6480 0 0 -20 Cold rolled coil 1.5mm*1250*2500 ST12 Wugang 6480 0 0 -20 Cold rolled coil 2.0mm*1250*2500 ST12 Wugang 6480 0 0 -20 Cold rolled coil 3.0mm*1250*2500 ST12 Wuhan Iron and Steel 6480 0 0 -20 Cold rolled coil 1.0mm*1250*c ST12 Kunming Steel 6400 0 0 -30 Cold rolled coil 1.0mm*1250*c ST12 Masteel 6400 0 0 -30 Cold rolled coil 1.0mm*1250 *c ST12 Handan Steel 6440 0 0 10 Puzhong Plate 6mm Q235B Xinyu 6640 0 0 140 Puzhong Plate 8mm Q235A Handan Steel 6590 0 0 140 Puzhong Plate 10mm Q235A Handan Steel 6290 0 0 140 Puzhong Plate 14-20mm Q235A Handan Steel 6120 0 0 140 Puzhong Plate 22-28mm Q235B Shao Steel 6120 0 0 140 Puzhong Plate 10mm Q235A Liujiang 6290 0 0 140 Puzhong Plate 12mm Q235A Liuzhou Steel 6170 0 0 140 Puzhong Plate 14-20mm Q235A Liusteel 6120 0 0 140 Puzhong board 8mm Q235A Xinyu 6590 0 0 140 Puzhong board 10mm Q235A Xinyu 6290 0 0 140 Puzhong board 12mm Q235A Xinyu 6170 0 0 140 Puzhong board 14-20mm Q235A Xinyu 6120 0 0 140 Low alloy board 8mm Q345 韶Steel 6720 0 0 120 Low alloy sheet 10mm Q345 Handan steel 6470 0 0 120 Low alloy sheet 12mm Q345 Handan steel 6300 0 0 100 Low alloy sheet 20mm Q345 Handan steel 6300 0 0 120 Boiler plate 6mm 20g Xinyu 6800 0 0 0 Boiler plate 8mm 20g Liuzhou Steel 6700 0 0 0 Boiler Plate 10mm 20g Liuzhou Steel 6450 0 0 0 Boiler Plate 12mm 20g Liu Steel 6200 0 0 0 Boiler Plate 14mm 20g Liu Steel 6200 0 0 0 Boiler Plate 20-39mm 20g Liu Steel 6500 0 0 0 Container plate 8mm 16MnR Liu steel 7030 0 0 Container plate 10mm 16MnR Liuzhou steel 6850 0 0 Container plate 12mm 16MnR Liuzhou steel Shougang 6750 0 0 Container plate 14-20mm 16MnR Liuzhou steel Shougang 6700 0 0 0 Container plate 22- 30mm 16MnR Liuzhou Steel/Shougang 6750 0 0 0 Container Plate 8mm 16MnR Xinyu 7000 0 0 0 Container Plate 10mm 16MnR Xinyu 6800 0 0 0 Container Plate 12mm 16MnR Xinyu 6650 0 0 0 Container Plate 14-20mm 16MnR Xinyu 6600 0 0 0 Seamless Tube Φ25*2.5 20# Wuxi 7600 0 0 0 Seamless Φ38*3 20# Xinyu 6850 0 0 0 Seamless Φ48*4 20# Xinyu 6850 0 0 0 Seamless Φ57*3.5 20# Xinyu 6800 0 0 0 Seamless pipe Φ60*4 20# Xinyu 6800 0 0 0 seamless pipe Φ89*4.5 20# Guangxi 6750 0 0 0 seamless pipe Φ108*4.5 20# angang 6750 0 0 seamless pipe Φ219*7 20# Chenggang 6700 0 0 0 seamless pipe Φ219*7 20# steel pack 6650 0 0 0 I-beam 18#/a Q235 sea steel 5150 0 0 0 I-beam 25#/a Q235 Laiwu Steel 5200 0 0 0 I-beam 25# /b Q235 Wugang 5310 0 0 0 I-beam 25#/b Q 235 Laiwu Steel 5210 0 0 0 I-beam 36#/b Q235 Laiwu Steel 5260 0 0 0 I-beam 40#/b Q235 Laiwu Steel 5280 0 0 0 Channel 16#a Q235 Masteel 5300 0 0 0 Channel 16 #a Q235 Masteel 5200 0 0 Channel 20# Q235 Masteel 5300 0 0 0 Channel 16#a Q235 Masteel 5320 0 0 0 Channel 20# Q235 Masteel 5120 0 0 0 40*5mm Q235 Steel 5500 0 0 0 Angle Steel 50*50*5mm Q235 Ma Steel 5500 0 0 0 Angle Steel 50*50*5mm Q235 Tong Steel 5400 0 0 0 Angle Steel 140*140*5mm Q235 Ma Steel 5400 0 0 0 Galvanized Steel Roll 0.7mm*1000 *C ST02Z Angang 6600 0 0 0 Galvanized coil 1.0mm*1000*C ST02Z Angang 6450 0 0 0 Galvanized coil 0.7mm*1000*C ST02Z Benxi Steel 6580 0 0 0 Galvanized coil 1.0mm*1000*C ST02Z Steel 6430 0 0 0 Galvanized coil 1.0mm*1000*C DC51D+Z Bengang 6430 0 0 0 Galvanized coil 1.0mm*1000*C DC51D+Z Masteel 6780 0 0 0 Color coated roll 0.326mm*1200*C SGCC Taiwan Yan Hui 8400 0 0 0 Color Coil 0.376mm*1000*C SGCC Taiwan Yan Hui 8300 0 0 0 Color Coil 0.5mm*1000*C SGCC Baosteel 8400 0 0 0 Color Coil 0.426mm*1000*C CGCC Shun Pu 8030 0 0 0 Cai Tu Juan 0.476mm*1000*C CGCC Shun Pu 7880 0 0 0
For the following reasons, this may be a better stack to use a four-layer PCB:
When the high-speed signal changes the reference plane, there should be a nearby path for its return current to move between the two reference planes. Using two horizons, you can do this by connecting two planes directly to a single channel. For grounding and power layers, the connection must be made through capacitors, which usually require two through-holes and one capacitor. This means worse signal integrity and more circuit board occupancy. On the other hand, having a power plane can reduce the voltage drop on the power rail, thereby releasing the space on the signal layer.
4-layer circuit board prototyping refers to the trial production of printed circuit boards before mass production. It is mainly used for electronic engineers to design circuits and complete PCB Layout, then to carry out small-scale trial production process to the factory, that is, proofing PCB. The production quantity of four-ply proofing generally has no specific boundaries. Generally, engineers call it proofing before product design has not been confirmed and test has been completed.
Notices for proofing of four-layer circuit boards
The precautions for the production of four-layer PCB samples generally include two groups, one is the Engineer group, the other is the PCB sample manufacturer.
As a group of engineers, the matters needing attention in proofing are as follows:
1. Choose proofing quantity carefully to control cost effectively.
2. Specially confirm device packaging to avoid proofing failure due to packaging errors.
3. Conduct comprehensive electrical inspection to improve the electrical performance of PCB board.
4. Make good signal integrity layout, reduce noise and improve PCB stability.
As a manufacturer of four-layer circuit boards, the precautions are as follows:
We specialize in Quick Turn PCB services with an industry leading turnaround time as fast as 24 hours. Three low-cost options for a small number of PCB prototyping needs. At the same time, we also provided Flexible PCB , Rigid-Flex PCB, Metal Core PCB, High-TG PCB, Aluminum PCB , PCB Stencils, PCB Assembly Services and so on. Using the same high-tech equipment as our full-service PCB, it can be manufactured quickly and with virtually no limits.
We provide a full range of PCB functions to meet all your PCB needs. At present, we accept five PCB file formats (gerber file,.Pcb,.Pcbdoc.cam or.brd file format) for PCB manufacturing. But if you design a circuit board using Sprint-Layout software, you can send the. LAy6 file to us to manually generate the Gerber file.
JingHongyi PCB can provide you with multi-layer PCB board that meets RoHS standard. With laminated material, it can match high temperature in assembly process. It is important to remember that some lead-free assembly processes will require laminated substrates to withstand temperatures exceeding 260 degrees Celsius or 500 degrees Fahrenheit over a longer period of time. To solve this problem, we have high temperature laminates in stock, so that our customers can meet the higher temperature cycle requirements of some lead-free assembly applications.
Min. Order Quantity: 1 pcs
Material: FR-4
Finished Copper: 1oz/2oz/3oz(35μm/70μm/105μm)
Inner Layer Copper Thickness:1oz/1.5oz(35μm/50μm)
Silkscreen: White, Black, None
Surface Finishing: HASL with lead, HASL lead free, Immersion gold, Hard Gold ,OSP...
Shape: Custom Shape
When making circuit boards, and after they are finished, we will test and inspect them strictly to ensure that the product reaches 100% eligibility rate. Preferential prices and higher quality have always been our constant pursuit:
4 Layer PCB
What is 4 layer PCB?
Four-layer circuit board is a kind of printed circuit board. It is made of four layers of glass fibre, which can reduce the cost of PCB.
Compared with Double Sided PCB, multi-layer PCB have many advantages. They can be designed more compactly. They can greatly improve noise resistance and make layout easier.
There are also great differences between the 2-layer and 4-layer PCB. For details, please click: What's the difference between 2 layer and 4 layer PCBs?
4 layer PCB stackup and thickness
4 layer PCB stackup include two inner layers, inner layer 1 and 2, are sandwiched between the top and bottom layers. From top to bottom, the 4-layer PCB stackup like below ,The top, i.e. the signal layer (0.0014 in. width) is followed by a prepreg layer with a thickness of 0.0091 in. and dielectric constant of 4.2. The top layer is copper material. The prepreg layer is followed by inner layer 1 (0.0014 in.), referred to as the plane. A core sublayer is part of inner layer 1, which has a width of 0.037 in. This is followed by inner layer 2, which is another plane layer made with 1 oz. copper and is 0.0014 in. thick. Another prepreg sublayer constituting two sheets that are 0.0091 in. thick forms part of inner layer 2. The final layer, the bottom layer, is also 0.0014 in. thick, and is a signal layer as well. Interconnects are soldered and placed on the top and bottom layers.
4-layer PCB has two stacking forms
The standard 4-layer PCB stack is shown below, and GND and VCC can be switched according to the layer with more signals.
If you don't want to connect all the ground pins through the hole, there will be different stacks and wide power routing on the signal plane.
For the following reasons, this may be a better stack to use a four-layer PCB:
- The signal layer is adjacent to the plane. The signal running on the reference plane (whose voltage is exactly at the VCC) will still return on the reference plane.
- Signal layers are tightly coupled to their adjacent planes.
- The ground surface can be used as a shield for the internal signal layer. You will get better results, so that your plane height is as low as possible.
- Multiple grounding layers reduce the grounding (reference plane) impedance of PCB and common mode radiation.
When the high-speed signal changes the reference plane, there should be a nearby path for its return current to move between the two reference planes. Using two horizons, you can do this by connecting two planes directly to a single channel. For grounding and power layers, the connection must be made through capacitors, which usually require two through-holes and one capacitor. This means worse signal integrity and more circuit board occupancy. On the other hand, having a power plane can reduce the voltage drop on the power rail, thereby releasing the space on the signal layer.
PCB Board Thickness
4 LAYER 0.8 MM STANDARD BUILD
4 LAYER 1.6 MM STANDARD BUILD
0.4mm, 0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.6mm, 2.0mm, 2.4mm, Please contact us if your board exceeds these.
4 layer PCB Prototype
4-layer circuit board prototyping refers to the trial production of printed circuit boards before mass production. It is mainly used for electronic engineers to design circuits and complete PCB Layout, then to carry out small-scale trial production process to the factory, that is, proofing PCB. The production quantity of four-ply proofing generally has no specific boundaries. Generally, engineers call it proofing before product design has not been confirmed and test has been completed.
Notices for proofing of four-layer circuit boards
The precautions for the production of four-layer PCB samples generally include two groups, one is the Engineer group, the other is the PCB sample manufacturer.
As a group of engineers, the matters needing attention in proofing are as follows:
1. Choose proofing quantity carefully to control cost effectively.
2. Specially confirm device packaging to avoid proofing failure due to packaging errors.
3. Conduct comprehensive electrical inspection to improve the electrical performance of PCB board.
4. Make good signal integrity layout, reduce noise and improve PCB stability.
As a manufacturer of four-layer circuit boards, the precautions are as follows:
1. Check PCB files carefully to avoid data problems.
2. Conduct process approval in an all-round way and process configuration with self-manufacturer.
3. Control production quantity, reduce cost and maintain quality.
4. Communicate with customers who need samples to prevent accidents in advance.
4 layer PCB price and cost
We specialize in Quick Turn PCB services with an industry leading turnaround time as fast as 24 hours. Three low-cost options for a small number of PCB prototyping needs. At the same time, we also provided Flexible PCB , Rigid-Flex PCB, Metal Core PCB, High-TG PCB, Aluminum PCB , PCB Stencils, PCB Assembly Services and so on. Using the same high-tech equipment as our full-service PCB, it can be manufactured quickly and with virtually no limits.
Cost of four layer PCB is higher than double sided PCB because of complexity of design and higher sensitivity. The better quality of signals, achieved by reducing distortion and propagation levels, is also a factor. Because of the higher levels of signal integrity and reduced interference levels, more manufacturers prefer four layer PCB.
4 layer PCB manufacturing
We provide a full range of PCB functions to meet all your PCB needs. At present, we accept five PCB file formats (gerber file,.Pcb,.Pcbdoc.cam or.brd file format) for PCB manufacturing. But if you design a circuit board using Sprint-Layout software, you can send the. LAy6 file to us to manually generate the Gerber file.
JingHongyi PCB can provide you with multi-layer PCB board that meets RoHS standard. With laminated material, it can match high temperature in assembly process. It is important to remember that some lead-free assembly processes will require laminated substrates to withstand temperatures exceeding 260 degrees Celsius or 500 degrees Fahrenheit over a longer period of time. To solve this problem, we have high temperature laminates in stock, so that our customers can meet the higher temperature cycle requirements of some lead-free assembly applications.
Min. Order Quantity: 1 pcs
Material: FR-4
Finished Copper: 1oz/2oz/3oz(35μm/70μm/105μm)
Inner Layer Copper Thickness:1oz/1.5oz(35μm/50μm)
Silkscreen: White, Black, None
Surface Finishing: HASL with lead, HASL lead free, Immersion gold, Hard Gold ,OSP...
Shape: Custom Shape
100% Quality control
When making circuit boards, and after they are finished, we will test and inspect them strictly to ensure that the product reaches 100% eligibility rate. Preferential prices and higher quality have always been our constant pursuit:
- E-test
- AOI - Testing (Automatic Optical Detection)
- X-ray (check multi-layer registration accuracy)
- CCD-camera controlled drilling
- Impedance control
Videos for 4 layer PCB design and manufacturing
4 Layer PCB
Printed Circuit Board,4 Layer PCB,4 Layer PCB Board,4 Layer Printed Circuit Board
JingHongYi PCB (HK) Co., Limited , https://www.pcbjhy.com