Golden Steel Material is a premier ISO-certified stockist based in Al Jubail. We supply high-performance pipes, fittings, valves, and flanges to the Oil & Gas and Industrial sectors across Saudi Arabia and the GCC.
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Golden Steel Material is a premier ASTM B729 Alloy 20 Tubes Supplier in Saudi Arabia, offering specialized super-austenitic solutions for the Kingdom’s most aggressive chemical processing environments. Alloy 20 (UNS N08020), colloquially known as "Carpenter 20," is specifically engineered for maximum resistance to sulfuric acid attack. With its high concentration of Nickel, Chromium, and Molybdenum, supplemented by Columbium (Niobium) stabilization, it provides an impenetrable defense against intergranular corrosion in fertilizer production and acid pickling lines.
As a trusted Alloy 20 Seamless Tubes stockist, we supply tubing manufactured to ASTM B729 and ASME SB729 standards, ensuring high-pressure integrity for the most demanding fluid transport systems. These tubes are highly resistant to chloride-induced stress corrosion cracking (SCC) and pitting, making them a superior choice for heat exchangers and mixing tanks in Saudi Arabia’s petrochemical refineries. The addition of Copper in the alloy matrix further enhances its performance in hot sulfuric and phosphoric acid media—common in Ma'aden’s phosphate mining operations.
We serve as a leading ASTM B729 Alloy 20 Tubes exporter in Saudi Arabia, delivering products that meet the rigorous quality audits of Saudi Aramco, SABIC, and Ma'aden. Every order is accompanied by MTC EN 10204 3.1 certification and undergoes mandatory PMI and Hydrostatic verification. Whether you require solution-annealed tubing for chemical injection or precision-cut lengths for sulfur recovery units, our Alloy 20 solutions provide the specialized durability needed to handle the Kingdom’s most challenging corrosive chemicals.
Alloy 20 Seamless Tube Supplier
Alloy 20 Welded Tube
Alloy 20 Seamless / Welded Pipe
| Trade Name | Alloy 20, Carpenter 20, UNS N08020 |
| Size Range (OD) | 6.35 mm OD to 152 mm OD |
| Wall Thickness (SWG) | 10, 12, 14, 16, 18, 20 SWG |
| Available Forms | Round, Coil, ‘U’ Shape, Square, Rectangular, Hydraulic |
| Length | Standard Length (6 Meters), Double Random & Custom Cut-to-length |
| Value Added Services | Draw & Expansion, Precision Bending, Solution Annealing & Pickling, Machining, Beveling |
| Testing & Certification | Manufacturer Test Certificate (MTC), Govt. Approved Lab Testing, Third-Party Inspection (DNV, TUV, Lloyd's) |
| Primary Applications | Shipping, Offshore Construction, Acid Condensers, Heat Exchangers, Fertilizer Production |
| Standard Body | Designation / Grade |
|---|---|
| UNS | N08020 |
| Werkstoff Nr. | 2.4660 |
| EN (European) | NiCr20CuMo |
| AFNOR (French) | Z2NCUD31-20AZ |
| ASTM Standard | ASTM B729 (Seamless) / B468 (Welded) |
| Pipe / Tube Type | NB Size | SCH 5 | SCH 10 | SCH 40 | SCH 80 | SCH 160 |
|---|---|---|---|---|---|---|
| ASTM B729 Alloy 20 Seamless / Welded Tube |
1/8" | — | ||||
| 1/4" | — | |||||
| 3/8" | — | |||||
| 1/2" | ||||||
| 3/4" | ||||||
| 1" | ||||||
| 1 1/4" | ||||||
| 1 1/2" | ||||||
| 2" | ||||||
| 2 1/2" | ||||||
| 3" | ||||||
| 4" | ||||||
| 5" | — | |||||
| 6" | — |
| Element | Percentage (%) Specification |
|---|---|
| Nickel (Ni) | 32.00 – 38.00 |
| Chromium (Cr) | 19.00 – 21.00 |
| Copper (Cu) | 3.00 – 4.00 |
| Molybdenum (Mo) | 2.00 – 3.00 |
| Niobium (Nb) + Tantalum (Ta) | 8 x C min – 1.00 max |
| Iron (Fe) | Balance (Approx. 29.85 Min*) |
| Carbon (C) | 0.07 Max |
| Manganese (Mn) | 2.00 Max |
| Silicon (Si) | 1.00 Max |
| Phosphorus (P) | 0.045 Max |
| Sulfur (S) | 0.035 Max |
Physical Properties
| Property Type | Value / Specification (Min) |
|---|---|
| Density | 8.05 g/cm³ |
| Melting Point | 1385 – 1443 °C (2525 – 2630 °F) |
| Tensile Strength (MPa) | 550 MPa (80,000 psi) Min |
| Yield Strength 0.2% Offset (MPa) | 240 MPa (35,000 psi) Min |
| Elongation (% in 50mm) | 30% Min |
| Hardness (Rockwell B) | 95 HRB Max |
| Modulus of Elasticity (GPa) | 193 GPa |
| Specific Heat Capacity | 460 J/kg·K |
| Industrial Locations & Keywords |
|---|
| Riyadh Industrial Cities (1st, 2nd, 3rd & Sudair) |
| Jeddah Industrial Cities (1st, 2nd & 3rd) |
| Dammam Industrial Areas (1st, 2nd & 3rd) |
| Jubail Industrial City |
| Yanbu Industrial City |
| Rabigh Industrial City |
| Al Khobar Industrial Area |
| Al Ahsa Industrial City |
| Madinah Industrial City |
| Makkah Industrial City |
| Taif Industrial City |
| Tabuk Industrial City |
| Jazan Industrial City |
| Industrial supplier in Saudi Arabia |
| Pipe fittings supplier in Jubail / Dammam / Riyadh |
| Flange and valve supplier Saudi Arabia |
| Fast delivery industrial materials KSA |
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