Standard: GB/T3098.1 ISO898-1 or costomer’s request
Mechanical Properties
| Grade | Dia | Tensile Strength Rm/MPa |
2% Elongation Limit RP 0.2/MPa |
Stress Under Proof Load SPf/MPa |
Elongation after fracture A/% |
Reduction oF Area after Fracture Z/% | Rockwell Hardness /HRC |
Bolt Length mm |
-40 ℃ Impact Absorb Energy K/J |
|
| min | max | max | ||||||||
| 8.8 | M16 ~M56 |
830 | 660 | 600 | 12 | 52 | 23 | 34 | 12000 | 27 |
| 9.8 | 900 | 720 | 650 | 10 | 48 | 28 | 37 | |||
| 10.9 | 1040 | 940 | 830 | 9 | 48 | 32 | 39 | |||
| 12.9 | 1220 | 1100 | 970 | 8 | 44 | 39 | 44 | |||
Common specifications
| DIA | Grade | Length | |
| Φ35mm(M36) | 8.8 | 10.9 | As Clients’ Demands |
| Φ40mm(M42) | 8.8 | 10.9 | |
| Φ45mm(M48) | 8.8 | 10.9 | |
| Φ53mm(M56) | 8.8 | 10.9 | |
Note: Grades, sizes are allowed to change
Manufacture Process
As per different raw materials and demands, process details will be adjusted.
Sample 1.
Raw Material Test — Normalizing — Sand blasting — Drawing & Straightening — Heat Treatment
— UT Test — Saw cutting — Chamfer — Polishing — Screw thread — Tensile test — Marking —
QC Test — Anti-corrosion Test — Stock
Sample 2.
Raw Material Test — Heat Treatment — Pealing — Polishing — UT Test — Saw Cutting — Chamfer
— Polishing — Screw Thread — Tensile Test — Marking — QC Test — Anti-corrosion Test — Stock
Post time: Jan-16-2020