We often encounter some fasteners in our work and life. For example, the commonly used 8.8-class hex bolts, what does it mean?
Today, I would like to share with you the meaning of the strength grade of carbon steel fasteners.
The strength grade of bolts is divided into more than 10 grades of 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9. Our daily use level is 4.8, 8.8, 10.9, 12.9.
The level of the bolt represents a lot of meaning, and its grade number is composed of two parts, which respectively represent the nominal tensile strength value and the yield ratio of the bolt material.
For example, class AB bolts, the front number A represents the nominal tensile strength value of the bolt, expressed as a value of 1/100; the latter ".B" (point B) represents the ratio of the bolt yield strength, the previous value is multiplied by the latter The numerical value represents the nominal yield strength of the bolt.
AX100=Nominal tensile strength of this bolt
AX100X (B/10) = nominal yield strength of this bolt
For example: 6.8 grade hex bolts have the following meanings:
1. The nominal tensile strength of the bolt is 6X100=600 Mpa=600 N/mm, ie the minimum pulling force per square millimeter is 600 N
2. The latter .8 (point 8) represents a yield strength ratio of 0.8.
3. The nominal yield strength of the bolt is =600x0.8=480Mpa= 480 N/mm, ie the yield force per square millimeter is 480 N
In general, the greater the level of the bolt, the greater the tensile strength and yield strength, and the higher the strength of the bolt.
Of course, the strength grade of the bolt not only represents the above meaning, but also represents other meanings of the hardness, material, heat treatment, mechanical properties of the bolt.
Mesh gabion is also known as gabion barrier, gabion concertainer. It is made of steel welded mesh, spring coil, non-woven geotextile with other fittings to make a simple and strong multi-cellular system.
The finish of barrier is in pre galvanized,galfan coated,hot dipped galvanized to anti corrosion for long lifespan. The barrier is easy to move and install, so it is widely used in military defensive blast wall, flood control, erosion control, security fence barrier and garden decoration.
Specification:
| Barrier size | 0.61*0.61m,1.37*1.06m,1.37*1.22m,2.12*1.52m,2.21*2.13m |
| Wire diameter | 3.8mm,4.0mm,4.5mm,5.0mm,etc. |
| Mesh size | 50*50mm,65*65mm,76.2*76.2mm,80*80mm,100*100mm |
| Geotextile |
200-400gr/m2 Heavy duty non-woven polypropylene, color can be beige-sand, olive green,grey,white,etc |
| Spring diameter | 3mm,4mm,5mm,etc. |
| Finish | pre galvanized, galfan coated,hot dip galvanized |
| Packing | Wrapped with shrink film then on pallet |
| Accessories | Y post,Razor wire, Barbed Wire |
Product application:
∗Perimeter Security and Defence Walls,
∗Equipment Revetments,
∗ garden landscaping decorative
∗Personnel and Material Bunkers, Observation Points, Defensive Firing Positions
∗Guard Posts, Explosives and Contraband Search Areas, Highway Checkpoints,
∗Border Crossing Checkpoints, Protecting Existing Structures, Flood control retaining wall
∗Coastal Erosion, Protection engineering of seaside area.
Gabion Defense,Gabion Defense Barrier,Gabion Hesco Barrier,Welded Defensive Bastion
Hebei Yicheng Wire Mesh Products Co., Ltd , https://www.yc-fence.com