EN 15048-1(全套螺栓组件)

PRODUCTS：Non-preloaded structural bolting assemblies

Bolts grade: 8.8  10.9

Nuts grade: 8  10

Washer hardness class: HV100, HV200, HV300

Thread size: M20-M72

Mechanical Properties meet ISO898-1, CL 8.8 10.9 

Elongation after fracture  

Minimum tensile strength

Lower yield strength or stress ar 0.2% non-proportional elongation

Stress under proof load

Strength under wedge loading

Hardness

Impact strength Kv， min at -20℃

Quality management systems: ISO9001