Common technical standards for domestic valve materials by solution treatment austenitic - ferritic steel bar or specimen mechanical properties a Â
GB / T 20878 In the serial number | Unite digital Code | New brand | Old brand | Provisions non-proportional extension Strength R P0.2 b / (N / mm 2 ) | Tensile strength R m / (N / mm 2 ) | Elongation at break A /% | rate of reduction in area Z c /% | Impact absorption function A ku2 d / J | Hardness b | ||
HBW | HRB | HV | |||||||||
not less than | no greater than | ||||||||||
67 | S21860 | 14Cr18Ni11Si4AlTi | 1Cr18Ni11Si4AlTi | 440 | 715 | 25 | 40 | 63 | - | - | - |
68 | S21953 | 022Cr19Ni5Mo3Si2N | 00Cr18Ni5Mo3Si2 | 390 | 590 | 20 | 40 | - | 290 | 30 | 300 |
70 | S22253 | 022Cr22Ni5Mo3N | Â | 450 | 620 | 25 | - | - | 290 | - | - |
71 | S22053 | 022Cr23Ni5Mo3N | Â | 450 | 655 | 25 | - | - | 290 | - | - |
73 | S22553 | 022Cr25Ni6Mo2N | Â | 450 | 620 | 20 | - | - | 260 | - | - |
75 | S25554 | 03Cr25Ni6Mo3Cu2N | Â | 550 | 750 | 25 | - | - | 290 | - | - |
 a Table 7 applies only to rods of diameter, length, thickness or opposite edge distance less than or equal to 75 mm. Steel bars larger than 75 mm may be forged into a 75 mm sample test or negotiated by both supply and demand to provide values ​​that allow the mechanical properties to be reduced.  b provides non-proportional extension strength and hardness, only when the demand side (specified in the contract) was measured, and the supplier can be based on the size or state of the steel rod or a determination of hardness.  c flat steel does not apply, but the demand side, both parties determined by the supply and demand.  d diameter or an opposite side distance of 16mm or less round, hexagonal, octagonal, and the steel edge length equal to or less than 12mm thickness of the steel, flat not impact test. |
This model is applied to wheat and rice which can achieve harvesting, threshing, separating and cleaning all at one time. The compact body design makes it more easily handling and convenient operating, which is especially for small and medium farms.
The cutting platform is equipped at the front of the body, which makes inclining T-shape with the threshing body, is applied to cutting and delivering. Hydraulic controlled lifting of the cutting platform and reel enable the operation more reliable. The threshing and cleaning which includes threshing, separating, cleaning and delivering mechanism etc. is applied to threshing, separating, cleaning and delivering the seeds to the storage box, with the terms in strips and chaffed spread to the ground. The 150 HP engine is located at the top of the cleaning room, which offer the drive forces for the walking, hydraulic system and the working mechanism. Chassis and the walking part are the special self-propelled mechanism, which include front and the rear axle, drive wheels, transmission, and the steering wheels.
The cabin includes the operating mechanism and the instrument system which is for the operating and monitoring the working system.
Shandong dafeng Machinery Co.,Ltd
Wheat Combine Harvester, Wheat Harvester, Wheat Combine
Shandong Gold Dafeng Machinery Co., Ltd , https://www.golddafengharvester.com