| Customization: | Available |
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| After-sales Service: | Service First |
| Warranty: | Service First |
| Shipping Cost: | Contact the supplier about freight and estimated delivery time. |
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| Support payments in USD |
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| Refund policy: | Claim a refund if your order doesn't ship, is missing, or arrives with product issues. |
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| Parameter Category | Q235B | Q355D | Q420 | 40CrMo |
| Material standards | Carbon structural steel | low alloy high strength steel | High-strength structural steel | Alloy structural steel |
| Yield strength (MPa) | ≥235 | ≥355 (-20ºC impact ≥27J) | ≥420 | ≥930 (after conditioning) |
| Tensile strength (MPa) | 375-500 | 470-630 | 520-680 | 1080-1320 |
| Heat treatment process | Cold drawing + stress relief annealing | Quenching and tempering (quenching + tempering) | Normalizing or TMCP | Quenching and tempering (850ºC quenching + 560ºC tempering) |
| Surface treatment | Galvanized/blackened | Galvanized/hard chrome plating | Galvanizing/phosphating | Hard chrome plating/black oxidation |
| Applicable diameter range | Ø3~50mm | Ø5~60mm | Ø8~80mm | Ø10~100mm |
1. Q: What information is required for a quote?
A: To expedite the quoting process, please provide the following details with your inquiry.
1) Comprehensive drawings (STEP, CAD, PROE, DXF, and PDF formats)
2) Material specifications (ALU., STEEL, IRON, COPPER, etc.)
3) Surface treatment preferences (anodizing, powder coating, sandblasting, plating, polishing, brushing)
4) Quantity (per order/ per month/ annual)
5) Do you have any special demands or requirements, such as packing, labels, delivery? Please let us know your needs, so we can ensure your expectations are met with precision and care.
2.Q: What shall we do if we do not have drawings?
A: No worries, simply send your samples to us, accompanied by drafts specifying the Thickness, Length, Height, and Width. Our expert engineering team will craft detailed CAD or 3D files for you, ensuring a seamless process.
3.Q:How do we ensure quality?
A:Samples are pre-produced before mass production and final inspection is mandatory before shipment
4.Q:What can you buy from us?
A:Sheet metal parts, steel structure parts, precision machined parts, special metal parts, etc. can be customised.
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