| 1. Material | ||||||||||||||
| No. | Material | |||||||||||||
| 1.1 | High manganese steel like ZGMn13,stainless steel,aluminum,or custom | |||||||||||||
| 2. Product size and tolerance | ||||||||||||||
| No. | Specification | Size | Tolerance | |||||||||||
| 2.1 | Outer Diameter (mm) | ≤500, or customized | ±1.5, or as per drawing | |||||||||||
| 2.2 | Inner Diameter (mm) | ≤450, or customized | ±1.5, or as per drawing | |||||||||||
| 2.3 | Wall Thickness (mm) | 6 to 6.4, or customized | ±0.3, or as per drawing | |||||||||||
| 2.4 | Height (mm) | ≤450 or customized | Max ±1.5, or as per drawing | |||||||||||
| 2.5 | Inner chamfer radius (mm) | ≥2 | ±1, or as per drawing | |||||||||||
| 2.6 | Outer chamfer radius (mm) | ≥4 | ±1, or as per drawing | |||||||||||
| 3. Chemical composition for materials | ||||||||||||||
| No. | Number | Chemical Composition (%) | ||||||||||||
| C | Si | Mn | P | S | Fe | |||||||||
| 3.1 | Mn13 | 0.90-1.20 | 0.30-0.80 | 11.00-14.00 | ≤0.035 | ≤0.030 |
85.0-88.0 | |||||||
| 4. Mechanical properties | ||||||||||||||
| No. | Number | Yield Strength (Mpa) |
Tensile Strength (Mpa) |
Elongation (%) |
Initial Hardness (HB) |
Hardness after Hardening (HB) | Impact at 20โ (J) |
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| 4.1 | Mn13 | ≥400 | ≥800 | ≥40% | ≥200 | ≥400 | ≥90 | |||||||
| 5. Surface finish and other properties | ||||||||||||||
| No. | Item | Description | ||||||||||||
| 5.1 | Surface finish | The surface shall be smooth,clean and free from any contamination that cannot be readily removed by cleaning agents normally used in manufacturing | ||||||||||||
| 5.2 | Surface roughness (Ra) | from 30um to 3.2um depending on detailed requirement | ||||||||||||
| 5.3 | Manufacturing Process Brief | Material preparation→Deep drawing (or spinning)→Reshaping→Surface treatment | ||||||||||||
| 5.4 | Raw material source | TAIYUAN IRON & STEEL (GROUP) CO.,LTD. Or Baosteel Group Corporation,etc. | ||||||||||||
| 6. Packing,Shipping and others | ||||||||||||||
| No. | Item | Description | ||||||||||||
| 6.1 | Packing | To be packed in wooden crate | ||||||||||||
| 6.2 | Marking | Each box to be legibly marked with the name of the manufacturer or supplier, the designation of material,condition,dimensions and weight | ||||||||||||
| 6.3 | Shipping tools | Ship goods by van to departune port then by sea to desitination port | ||||||||||||
| 7.Quality management and spot management | ||||||||||||||
| No. | Item | Description | ||||||||||||
| 7.1 | Quality control | 1. Quality assurance a. Incoming material quality assurance; b. Process quality assurance; c. First sample quality assurance; d. Final quality assurance. 2. Process management-The right results are from the right process a. Production process card control; b. Standard operational procedure;c.Job certification;d. Quality chart monitor. 3. Equipment and facility management a. Periodic maintenance; b.Preventative maintenance. 4. Mold management a. Mold life management; b.Periodic and preventative maintenance; c. Periodic inspection. |
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| 7.2 | Inspection Tools | Altimeter,Vernier caliper,Micrometer,3D coordinate measuring instrument | ||||||||||||
| 7.3 | Spot management | "5S" management (sort,set in order,shine,standard,sustainable). | ||||||||||||
