Common technical standards for domestic valve materials by solution treatment austenitic - ferritic steel bar or specimen mechanical properties a

August 21, 2019

Common technical standards for domestic valve materials by solution treatment austenitic - ferritic steel bar or specimen mechanical properties a  

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   450 620 25 - - 290 - -
71 S22053 022Cr23Ni5Mo3N   450 655 25 - - 290 - -
73 S22553 022Cr25Ni6Mo2N   450 620 20 - - 260 - -
75 S25554 03Cr25Ni6Mo3Cu2N   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.

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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.

Specifications for wheat&Rice Combine Harvester machine
Model
4LZ-7
Barn capacity
2m³
Feeding volume
7kg/s
Threshing type
dual- roll
Working width
2560mm
Horse power
150 HP
Working efficiency
6000-12000m2/h
Dimensions
6700*3400*3380mm

4lz-74lz.7
Shandong dafeng Machinery Co.,Ltd

Employing more than 600 people, the Company is composed of manufacturing department, marketing department, engineering department, purchase department, process equipment department, QA department, HR department, administrative department, financial department, etc. The Company totally covers 100,000m2. Till now, the phase I and phase II, which include a 33,600m2 modern standard plant building and a 1,500m2 office building, have been completed, and their total investment was more than RMB 180 million.








Wheat combine harvester

Wheat Combine Harvester, Wheat Harvester, Wheat Combine

Shandong Gold Dafeng Machinery Co., Ltd , https://www.golddafengharvester.com

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