Specification material steel factory/origin price (yuan/ton) Than yesterday last week than the previous month General line Φ6.5mm Q235 Tong Steel 5400 0 180 370 Common line Φ6.5mm Q235 Siping red mouth 5370 0 180 370 High line Φ6.5mm Q235 Tong Steel 5480 0 220 410 High Line Φ10mm Q235 Tong Steel 5480 0 220 410 High Line Φ8mm Q335 Beitai 5480 0 220 410 Rebar Φ12mm HRB335 Tong Steel 5520 0 270 540 Rebar Φ14mm HRB335 Tong Steel 5520 0 270 540 Rebar Φ16- 25mm HRB335 Linggang 5370 0 270 510 Rebar Φ16-25mm HRB335 Tonggang 5370 0 270 510 Rebar Φ16-25mm HRB335 Beitai 5370 0 270 510 Rebar Φ16-25mm HRB335 Xilin 5370 0 270 510 Rebar Φ8-10mm HRB400 New Steel 5820 0 300 590 Rebar Φ8-10mm HRB400 Tong Steel 5820 0 300 590 Hot Roll 2.0*1250*C Q235 Tong Steel 5980 0 0 100 Hot Roll 2.3*1250*C Q235 Tong Steel 5880 0 0 130 Hot Roll 2.75*1250*C Q235 Angang 5750 0 0 120 Hot rolled coil 3.0*1250*C Q235 Angang 5720 0 0 140 Hot rolled coil 3.0*1250*C Q235 Bengui 5720 0 0 140 Hot rolled coil 4.0*1250*C Q235 Angang 5480 0 0 130 Hot rolled coil 4.75*1250*C Q235 Angang 5480 0 0 130 Hot rolled coil 5.5*1500*C Q235 Steel 5480 0 0 130 Hot Roll 5.5*1500*C Q235 Steel 5480 0 0 130 Hot Roll 6.5*1250*C Q235 Ben Steel 5480 0 0 130 Hot Roll 7.5*1250*C Q235 Ben Steel 5480 0 0 130 Cold Rolled Sheet 1.0* 1000*2000mm Q195 Angang 6650 0 50 70 Cold rolled steel plate 1.0*1250*2500mm Q195 Benxi Steel 6650 0 50 70 Cold rolled plate 2.0*1250*2500mm Q195 Angang 6550 0 0 0 Cold rolled coil 3.0*1000*2000 Q195 Bengang 6630 0 50 50 Puzhong Plate 8mm Q235 Jigang 6830 0 0 230 Puzhong Plate 8mm Q235 Angang 6830 0 0 230 Puzhong Plate 10mm Q235 Angang 6330 0 0 230 Puzhong Plate 10mm Q235 Jigang 6330 0 0 230 Puzhong Plate 16- 20mm Q235 Angang 6080 0 0 230 Puzhong Plate 16-20mm Q235 Tiansteel 6080 0 0 230 Low Alloy Plate 8mm Q345 Angang 6980 0 0 230 Low Alloy Plate 10mm Q345 Angang 6480 0 0 230 Low Alloy Plate 14mm Q345 Angang 6330 0 0 230 Pattern Plate 3mm Q235 Angang 5730 0 0 30 Pattern Plate 4mm Q235 Angang 5730 0 0 30 Pattern Plate 5mm Q235 Angang 5730 0 0 30 Pattern Plate 6mm Q235 Ansteel 5730 0 0 30 Container Plate 8mm 16MnR Angang 7100 0 0 350 Container Plate 10mm 16MnR Shougang 7000 0 0 300 Container Plate 12-20mm 16MnR Shougang 6800 0 0 100 Boiler Plate 8mm 20g Jinan Steel 7250 0 0 150 Boiler Plate 12mm 20g 6870 0 0 150 Boiler Plate 20mm 20g Angang 6670 0 0 150 Tinplate 0.21mm*1024*712 T57E Wugang 9900 0 200 200 Tinplate 0.25mm*1024*712 T57E WISCO 9700 0 100 100 Color Coil 0.5mm*1000 *C TST01 Baosteel 8600 0 0 0 Color Coil 0.6mm*1000*C TST02 Baosteel 8500 0 0 0 Galvanized Roll 0.5mm*1000*C SGCC Hengtong 6850 0 50 200 Galvanized Roll 1.0mm*1000*C ST02Z Bengang 6500 0 50 200 Seamless tube 60*4mm 20# Angang 7100 0 0 0 Seamless tube 108*4.5mm 20# Angang 6900 0 0 0 Seamless tube 133*4.5mm 20# Angang 6900 0 0 50 Seamless tube 159* 5mm 20# Angang 6900 0 0 200 Welded pipe 1.5 inch *3.0mm Q235 Welded steel 5610 0 110 290 Welded pipe 2 inch *3.25mm Q235 Linggang 5600 0 100 210 Welded pipe 3 inch *3.25mm Q235 Linggang 5550 0 100 160 I-beam 12-16# Q235 A-steel 5300 0 150 150 I-beam 25# Q235 Angang-steel 5500 0 100 100 Channel 16# Q235 Angang 5300 0 150 150 Channel 25# Q235 Large-rolling/ 0 0 0 50*5mm Q235 Steel 5150 0 100 100 Angle Steel 100*100mm Q235 Steel 5300 0 200 200
The role of the valve is specifically responsible for the input of air into the engine and exhaust the exhaust gas after combustion. From the engine structure, it is divided into intake valve and Exhaust Valve.
The role of the intake valve is to draw air into the engine and mix it with the fuel to burn; The function of the exhaust valve is to discharge the exhaust gas after combustion and dissipate heat.
The valve is composed of a valve head and a rod. The valve head temperature is very high (intake valve 570~670K, exhaust valve 1050~1200K), but also withstand the pressure of the gas, the valve spring force and the transmission component inertia force, its lubrication, cooling conditions are poor, requiring the valve must have a certain strength, stiffness, heat and wear resistance.
The intake valve is generally made of alloy steel (chromium steel, nickel-chromium steel), and the exhaust valve is made of heat-resistant alloy (silicon chromium steel).
Sometimes in order to save heat resistant alloy, the exhaust valve head is made of heat resistant alloy, and the rod is made of chromium steel, and then the two are welded together.
Engine Valve parts,Original Engine Intake Valve,Engine Exhaust Valve,Original Engine valve,Engine valve Set
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