Model NO.: 10.9
Application: Machinery
Finish: Hot Galvanizing
High Quality: Support for Mixed Batch
Tightened Inspection: Dozen Processes
Be Supplier of Railway for Many Years: Custom-Made Is Welcome
Also Produce Other Fastening: Reliable Product Quality
Trademark: hongtong
Transport Package: Plastic Bag and Carton
Specification: M22
Origin: Hebei
HS Code: 3926909090
Model NO.: 10.9
Application: Machinery
Finish: Hot Galvanizing
High Quality: Support for Mixed Batch
Tightened Inspection: Dozen Processes
Be Supplier of Railway for Many Years: Custom-Made Is Welcome
Also Produce Other Fastening: Reliable Product Quality
Trademark: hongtong
Transport Package: Plastic Bag and Carton
Specification: M22
Origin: Hebei
HS Code: 3926909090
Material  8.8 s,
45#,40Cr
 
10.9 s 
20MnTiB,35VB
Specification  M12-M36
Application  A variety of large-span steel bridges, large steel housing,
power station boiler steel structure, high-rise buildings,
stadiums, steel tower mast, port container cranes and other large-scale friction-type connection
standard: GB/T1228~1231 

High strength bolts
From raw material to see:
High strength bolts made of high-strength materials. Screw high-strength bolts, nuts and washers consists of high-strength steel production, steel commonly used 45, 40 boron steel, 20 manganese titanium boron steel, 35CrMoA like. Ordinary bolt used Q235 (equivalent to past A3) steel.
Judging from the intensity level:
High-strength bolts, the increasingly widespread use. Common 8.8s and 10.9s two intensity levels, the majority of which 10.9. Ordinary bolt strength grade is lower, typically 4.4, 4.8, 5.6 and 8.8.
From the mechanical characteristics of view:
High strength bolt by applying a pre-tension and friction transfer force. Ordinary bolted by bolt rod shear and pressure to pass the hole wall shear, a small pre-tension generated when tightening the nut, the impact is negligible, and high-strength bolts in addition to its material strength is high, put a lot of back bolt Pretentioned that generate compressive force between the connecting member so that the direction perpendicular to the screw has a great friction, and pre-tension, anti-slip coefficient and the types of steel have a direct bearing capacity of high-strength bolts.
According to the mechanical characteristics of sub-type pressure and friction type. Difference between the two calculation methods. High-strength bolts minimum specifications M12, used M16 ~ M30,
Link: http://marinepartscn.com/encontact.html
 
Tel: 0086 15933828740

 
Material  8.8 s,
45#,40Cr
 
10.9 s 
20MnTiB,35VB
Specification  M12-M36
Application  A variety of large-span steel bridges, large steel housing,
power station boiler steel structure, high-rise buildings,
stadiums, steel tower mast, port container cranes and other large-scale friction-type connection
standard: GB/T1228~1231 

High strength bolts
From raw material to see:
High strength bolts made of high-strength materials. Screw high-strength bolts, nuts and washers consists of high-strength steel production, steel commonly used 45, 40 boron steel, 20 manganese titanium boron steel, 35CrMoA like. Ordinary bolt used Q235 (equivalent to past A3) steel.
Judging from the intensity level:
High-strength bolts, the increasingly widespread use. Common 8.8s and 10.9s two intensity levels, the majority of which 10.9. Ordinary bolt strength grade is lower, typically 4.4, 4.8, 5.6 and 8.8.
From the mechanical characteristics of view:
High strength bolt by applying a pre-tension and friction transfer force. Ordinary bolted by bolt rod shear and pressure to pass the hole wall shear, a small pre-tension generated when tightening the nut, the impact is negligible, and high-strength bolts in addition to its material strength is high, put a lot of back bolt Pretentioned that generate compressive force between the connecting member so that the direction perpendicular to the screw has a great friction, and pre-tension, anti-slip coefficient and the types of steel have a direct bearing capacity of high-strength bolts.
According to the mechanical characteristics of sub-type pressure and friction type. Difference between the two calculation methods. High-strength bolts minimum specifications M12, used M16 ~ M30,
Link: http://marinepartscn.com/encontact.html
 
Tel: 0086 15933828740

 

Potassium Sulphate

Potassium sulfate is a common potash fertilizer. It can improve crops ability of drought resistance, cold resistance, lodging resistance,and pest disease resistance. It can also promote flowering and fruiting, and better use of nitrogen to increase protein content, and promote the production of sugar and starch. Especially suitable for tobacco, sugarcane, potato, sweet potato, grape, tea tree and other high potassium crops and sulfur-like cruciferous crops (such as rapeseed, beans, etc.) .Increase the strength, fineness,color purity of cotton and hemp crop fiber.

Potassium Sulphate

Appearance

White powder/granular

K

50% min

Cl

1.5% max

S

17.5% min

Moisture

1% max

Water insoluble

1% max

Potassium sulfate must be combined with nitrogen and phosphorus fertilizers for fully effect.

1. Do not apply to the roots of crops, neither to stems and leaves.

2. Not recommended for use in paddy fields or soil with strong reduction

3. Must be applied with lime or calcium magnesium and phosphate fertilizers for long-term application on the acidic soil.

4. Better to apply in small amount or mixed with farmyard fertilizer for sandy soil.

5. Prevent rain and damage during storage and transportation.


Potassium Sulphate,Potassium Sulfate,Potassium Sulphate Fertilizer,Soluble Sop Potassium Sulfate

Hebei Woldi Trading Co.,LTD , https://www.woldigroup.com