The strength characteristics of Q460NH weathering steel are detailed as follows:

1. Tensile strength:
- Generally in the range of 450-630 MPa, the specific value depends on the processing status and thickness of the material.

2. Yield strength:
- Generally not less than 365 MPa, indicating the strength level at which the material begins to undergo plastic deformation and maintains deformation.

3. Hardness:
- Q460NH weathering steel has a certain hardness and can resist deformation and scratches, making it suitable for engineering projects requiring higher strength.

4. Shear strength:
- Indicates a material's ability to resist when subjected to shear stress, usually related to tensile strength.

5. Impact toughness:
- Characterizes the durability of materials when subjected to impact loads. Sufficient impact resistance is required to ensure the safety of the structure under accidental loading.

6. Bending strength:
- Indicates the load-bearing capacity of Q460NH weathering steel when subjected to bending loading, which can maintain the integrity and stability of the structure.

7. Strength stability:
- During long-term use, the strength of Q460NH weathering steel should remain relatively stable and there should be no obvious strength attenuation or change.

8. Design strength:
- Design according to engineering requirements and relevant standards to ensure that the structure has sufficient safety and reliability during its design life, taking into account actual working conditions and environmental factors.

These strength characteristics make Q460NH weathering steel perform well under high-strength and complex engineering conditions. It has good durability and stability and is suitable for a variety of structural and construction fields.