GB/T 18704 Stainless Steel pipe Clad Steel Pipe Stainless Steel Tube 302 304 12Cr17Mn6Ni5N
Brand Name:TORICH
Certification:ISO 9001 ISO 14001 TS 16949 EN 10204.3.1 LR KR
Model Number:GB/T 18704
Minimum Order Quantity:0.5 ton
Delivery Time:34-45 days
Payment Terms:L/C, D/A, D/P, T/T, Western Union, MoneyGram
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Ningbo Zhejiang China
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Suite 1004, Hongan Plaza, #258 Die Yuan Road, Yinzhou District, Ningbo City, China
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within 42 hours
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Product Details
GB/T 18704 Stainless Steel pipe Clad Steel Pipe 302 304 12Cr17Mn6Ni5N
Application:Municipal facilities, vehicle and boat manufacturing, road and bridge guardrails, architectural decoration, steel structure grids, medical equipment, furniture, general mechanical components
size:L--2-12mm WT--0.6-8mm OD:12.7-219mm
delivery state:surface unburnished---SNB
surface burnished---SB
surface polished--SP
surface sandblasting--SA
Surface Quality:The internal and external surfaces of the steel tube are not allowed to have cracks, scabs, folds, delaminations, laps, and burns. Allows for scribes, scratches, misalignment of welds, burns, oxide scales, and external burr removal traces that are not more than a negative wall thickness deviation
Tolerance of OD
| Surface delivery condition | Nominal outside diameter | Tolerance |
Polishing,Polish (SB,SP) | ≤25 | ±0.25 |
| >25~40 | ±0.30 | |
| >40~50 | ±0.35 | |
| >50~60 | ±0.40 | |
| >60~70 | ±0.50 | |
| >70~80 | ±0.60 | |
| >80 | ±1%D | |
| Unpolished,Sand blasting(SNB,SS) | ≤25 | ±0.30 |
| >25~50 | ±0.40 | |
| >50 | ±1.0%D |
Tolerance of WT
| Wall thickness(S) | Tolerance(high-grade) | Tolerance(medium grade) |
| ≥0.8~2.0 | ±0.10 | ±0.20 |
| >2.0~3.0 | ±0.15 | ±0.30 |
| >3.0 | ±5%S | ±10%S |
Chemical composition
| No. | Unified digital code | New steel grade | Old steel grade | Chemical composition | |||||||
| C | Si | Mn | P | S | Ni | Cr | N | ||||
| 1 | S35350 | 12Cr17Mn6Ni5N | 1Cr17Mn6Ni5N | ≤0.15 | ≤1.00 | 5.50~7.50 | ≤0.050 | ≤0.030 | 3.50~5.50 | 16.00~18.00 | 0.05~0.25 |
| 2 | S35450 | 12Cr18Mn9Ni5N | 1Cr18Mn8Ni5N | ≤0.15 | ≤1.00 | 7.50~10.0 | ≤0.050 | ≤0.030 | 4.00~6.00 | 17.00~19.00 | 0.05~0.25 |
| 3 | S30210 | 12Cr18Ni9 | 1Cr18Ni9 | ≤0.15 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 8.00~10.00 | 17.00~19.00 | ≤0.10 |
| 4 | S30408 | 06Cr19Ni10 | 0Cr18Ni9 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 8.00~11.00 | 18.00~20.00 | - |
Mechanical property
| No. | Unified digital code | New steel grade | Old steel grade | Yield strength Rp0.2/MPa | Tensile Strength Rm/MPa | Elongation A/ ％ |
| ≥ | ||||||
| 1 | S35350 | 12Cr17MnNi5N | 1Cr17Mn6Ni5N | 245 | 520 | 25 |
| 2 | S35450 | 12Cr18Mn9Ni5N | 1Cr18Mn8Ni5N | 245 | 520 | |
| 3 | S30210 | 12Cr18Ni9 | 1Cr18Ni9 | 210 | 520 | 30 |
| 4 | S30408 | 06Cr19Ni10 | 0Cr18Ni9 | 210 | 520 | |
GB/T 18704 Stainless Steel pipe Clad Steel Pipe Stainless Steel Tube 302 304 12Cr17Mn6Ni5N
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