Material overview
Q355NH inquiries should retain the complete Chinese grade designation and the GB/T 4171 reference. Specify the required quality designation, delivery condition and acceptance documentation for the actual project.
Specification checkpoints
| Item | What to specify |
|---|---|
| Material | Q355NH plus project-required qualifiers |
| Reference | GB/T 4171; edition agreed in the purchase order |
| Test requirements | Confirm condition and specified inspection |
| Substitution | No automatic EN / ASTM equivalence |
Prepare the order details
Identify the required dimensions in millimeters, quantity in pieces and any tolerances beyond the agreed product standard. For shaped parts, include the drawing revision, cutting allowance and visible-face requirements.
- Thickness × width × length, with quantities for every size
- Mill finish, natural weathering or a separately agreed treatment
- Delivered condition, identification and inspection records
- Site exposure, intended application and drainage considerations
- Destination, delivery basis, packing and requested schedule
Processing methods, achievable sizes, sample approval and lead time are reviewed against the actual requirement. No fixed stock or capacity is implied by this page.
Application references
- Specified steel structures
- Equipment plate packages
- Cut-blank procurement
The final material decision belongs to the project specification. A grade or finish alone does not establish suitability for a particular structure or exposure.
Read the original standard or producer overview ↗
Informational overview. The agreed grade, standard edition, condition and order-specific documents govern supply. Grade references do not establish stock availability or automatic equivalence.