Yuhong Group Co.,Ltd
| Payment Terms | T/T,L/C |
| Supply Ability | 50 Tons/Month |
| Delivery Time | Depends On Quantity |
| Packaging Details | wooden Cases |
| Standard | ASTM B729 / ASME SB729, ASTM B829 |
| Grade | Alloy20 (UNS N08020, EN 2.4660), Nickel-Iron-Chromium Alloy |
| Type | Seamless Tube (SMLS), Hot-Finished / Cold-Worked |
| Process | Hot Extrusion/Piercing, Cold Drawing/Rolling, Stabilized Annealing |
| Outside Diameter | 6mm – 325mm (1/4” – 12”) |
| Wall Thickness | 0.5mm – 30mm, SCH 5S – SCH XXS |
| Length | 6000mm – 12000mm, Custom Length Optional |
| Dimensional Tolerance | Complies with ASTM B729, ±0.03mm (WT), ±0.5mm (OD) |
| Brand Name | YUHONG |
| Model Number | ASTM B729 N08020 |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
| Place of Origin | CHINA |
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Product Specification
| Payment Terms | T/T,L/C | Supply Ability | 50 Tons/Month |
| Delivery Time | Depends On Quantity | Packaging Details | wooden Cases |
| Standard | ASTM B729 / ASME SB729, ASTM B829 | Grade | Alloy20 (UNS N08020, EN 2.4660), Nickel-Iron-Chromium Alloy |
| Type | Seamless Tube (SMLS), Hot-Finished / Cold-Worked | Process | Hot Extrusion/Piercing, Cold Drawing/Rolling, Stabilized Annealing |
| Outside Diameter | 6mm – 325mm (1/4” – 12”) | Wall Thickness | 0.5mm – 30mm, SCH 5S – SCH XXS |
| Length | 6000mm – 12000mm, Custom Length Optional | Dimensional Tolerance | Complies with ASTM B729, ±0.03mm (WT), ±0.5mm (OD) |
| Brand Name | YUHONG | Model Number | ASTM B729 N08020 |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 | Place of Origin | CHINA |
| High Light | Alloy20 seamless corrosion-resistant tube ，ASTM B729 acid-resistant tube ，UNS N08020 stainless steel tube | ||
ASTM B729 Alloy20 (UNS N08020) Seamless Tube, Corrosion-Resistant for Acidic Environments
Brief Introduction
ASTM B729 Alloy20 seamless tube (SMLS TUBE) is a high-performance nickel-iron-chromium-molybdenum-copper alloy tube, strictly compliant with ASTM B729 / ASME SB729 standard, mainly made of Alloy20 (UNS N08020, EN 2.4660). It is a super austenitic alloy specially designed for corrosive service, featuring excellent resistance to sulfuric acid, phosphoric acid and chloride ion stress corrosion cracking, superior to ordinary stainless steel. With good mechanical properties, weldability and processing performance, it is a key component for conveying corrosive media in harsh industrial environments, widely used in chemical, petrochemical, pharmaceutical and other fields to ensure stable and efficient operation of pipeline systems.
Chemical Composition Analysis (wt%)
| Alloy Grade | C | Cr | Ni | Mo | Cu | Mn | Si | P | S | Ti |
|---|---|---|---|---|---|---|---|---|---|---|
| ASTM B729 Alloy20 (UNS N08020) | ≤0.07 | 19.0-21.0 | 32.0-38.0 | 2.0-3.0 | 3.0-4.0 | ≤2.0 | ≤1.0 | ≤0.045 | ≤0.035 | 0.6-1.2 |
Typical Mechanical Properties
| Mechanical Property | Standard Requirement (ASTM B729) | Typical Value |
|---|---|---|
| Yield Strength (Rp0.2), MPa | ≥240 | 245-320 |
| Tensile Strength (Rm), MPa | ≥550 | 560-700 |
| Elongation (A), % | ≥30 | 32-40 |
| Hardness (HB), Brinell | ≤200 | 140-190 |
| Impact Toughness (KV), J (-20℃) | ≥80 | 85-110 |
Product Application Scope
| Industry Field | Typical Applications |
|---|---|
| Chemical Processing | Sulfuric/phosphoric acid conveying pipelines, reactors, heat exchangers, acid washing equipment, chemical reagent transfer systems |
| Petrochemical | Oil refining corrosive media pipelines, offshore oil platforms, flue gas desulfurization (FGD) systems, crude oil processing auxiliary pipelines |
| Pharmaceutical | High-purity medium conveying pipelines, sterile equipment, chemical reagent conveying tubes, pharmaceutical purification systems |
| Marine Engineering | Seawater treatment pipelines, marine vessel corrosive-resistant tubes, coastal industrial equipment, offshore drilling platform pipelines |
| Environmental Protection | Wastewater treatment pipelines, hazardous waste treatment equipment, acid-base waste conveying systems, flue gas purification pipelines |
| Other | Chemical laboratories, electrolytic water hydrogen production equipment, high-purity water treatment systems, pickling industry pipelines |
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller,Other
Year Established:
2007
Total Annual:
50M-70M
Employee Number:
50~850
Ecer Certification：
Verified Supplier
Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou... Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou...
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