ASTM A312 / 1.4539 / AISI 904L Pipe
1. Standard: ASTM A312 / ASME SA312、ASTM A213/ASME SA213、ASTM B677 / ASME SB677
2. Size: 1/2”- 48”
3. Thickness: 0.5mm-30mm
4. 904L stainless steel pipe price: 15-25 $
Lork Group - Your Trusted Exporter for ASTM A312 904L / 1.4539 Stainless Steel Pipes
Lork Group is a leading international exporter and supplier of high-performance ASTM A312 AISI 904L Stainless Steel Pipes. Also known by the designations UNS N08904 and Werkstoff Nr. 1.4539, this super austenitic alloy is engineered for exceptional resistance to severe corrosive environments. Perfect for critical applications in chemical processing, petrochemical, pharmaceutical, and offshore industries. Our products meet the international standards, including ASTM A312, ASME SA312, and ASTM B677.
ASTM A312 904L Stainless Steel Pipe Specifications
| Specifications | ASTM A 312 / ASME SA 312 |
| ASTM B677 / ASME SB 677 | |
| Dimensions | ASTM, ASME and API |
| SS 904L Pipes | 1/2″ NB – 16″ NB |
| ERW 904L Pipes | 1/2″ NB – 24″ NB |
| EFW 904L Pipes | 6″ NB – 100″ NB |
| Size | 1/8″NB TO 30″NB IN |
| Schedule | SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
| Type | Seamless / ERW / Welded / Fabricated / LSAW Pipes |
| Length | Single Random, Double Random & Cut Length. |
| End | Plain End, Beveled End, Treaded |
AISI 904L Steel Pipe Size
| OD mm. | NPS in. | WT mm. | Sch | Kg/m |
| 13.72 | 0.25 | 1.65 | 10S | 0.5 |
| 2.24 | 40S | 0.64 | ||
| 3.02 | 80S | 0.81 | ||
| 17.15 | 0.375 | 1.65 | 10S | 0.64 |
| 2.31 | 40S | 0.86 | ||
| 3.2 | 80S | 1.12 | ||
| 21.34 | 0.5 | 2.11 | 10S | 1.02 |
| 2.77 | 40S | 1.29 | ||
| 3.73 | 80S | 1.65 | ||
| 26.67 | 0.75 | 2.11 | 10S | 1.3 |
| 2.87 | 40S | 1.71 | ||
| 3.91 | 80S | 2.23 | ||
| 33.4 | 1 | 2.77 | 10S | 2.13 |
| 3.38 | 40S | 2.54 | ||
| 4.55 | 80S | 3.29 | ||
| 6.352) | 160S | 4.3 | ||
| 42.16 | 1¼ | 2.77 | 10S | 2.73 |
| 3.56 | 40S | 3.44 | ||
| 4.85 | 80S | 4.53 | ||
| 6.352) | 160S | 5.69 | ||
| 48.26 | 1½ | 2.77 | 10S | 3.16 |
| 3.68 | 40S | 4.11 | ||
| 5.08 | 80S | 5.49 | ||
| 60.33 | 2 | 2.77 | 10S | 3.99 |
| 3.91 | 40S | 5.52 | ||
| 5.54 | 80S | 7.6 | ||
| 8.742) | 160S | 11.29 | ||
| 73.03 | 2½ | 3.05 | 10S | 5.35 |
| 5.16 | 40S | 8.77 | ||
| 7.01 | 80S | 11.59 | ||
| 88.9 | 3 | 3.05 | 10S | 6.56 |
| 5.49 | 40S | 11.47 | ||
| 7.62 | 80S | 15.51 | ||
| 11.132) | 160S | 21.67 | ||
| 101.6 | 3½ | 3.05 | 10S | 7.53 |
| 5.74 | 40S | 13.78 | ||
| 8.08 | 80S | 18.92 | ||
| 114.3 | 4 | 3.05 | 10S | 8.5 |
| 6.02 | 40S | 16.32 | ||
| 8.56 | 80S | 22.67 | ||
| 13.492) | 160S | 34.05 | ||
| 141.3 | 5 | 6.55 | 40S | 22.1 |
| 9.53 | 80S | 31.44 | ||
| 15.882) | 160S | 49.87 | ||
| 168.28 | 6 | 3.4 | 10S | 14.04 |
| 7.11 | 40S | 28.69 | ||
| 10.97 | 80S | 43.21 | ||
| 18.262) | 160S | 68.59 | ||
| 219.08 | 8 | 8.18 | 40S | 43.2 |
| 12.7 | 80S | 65.63 | ||
| 23.012) | 160S | 112.97 |
1.4539 AISI 904L Chemical Properties
| Grade | Cr | Ni | C | Si | Mn | P | S | Mo | Cu | Fe |
| AISI 904L | min: 19 max: 23 |
min: 23 max: 28 |
0.02 Max | 1.0 max | 2.0 max | 0.045 max | 0.035 max | min: 4 max: 5 |
min: 1 max: 2 |
balance |
Mechanical Properties
| Grade | Tensile Strength (MPa) min | Elongation (% in 50mm) min | Yield Strength 0.2% Proof (MPa) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| AISI 904L | 490 | 35 | 220 | 70-90 typical | - |
Manufacturing and Quality Assurance
To ensure every length of pipe meets the highest standards of integrity and performance, manufacturers adhere to a stringent quality protocol:
1. Heat Treatment: All 1.4539 stainless steel pipe is supplied in a solution-annealed condition. This process involves heating the material to a specific temperature (typically 1100-1170°C) followed by rapid quenching. This treatment dissolves any secondary phases (like carbides) that can impair corrosion resistance and restores the material's ductility.
2. Comprehensive Testing Regime: Each production batch undergoes a battery of tests to verify its properties:
Mechanical Testing:
- Transverse or Longitudinal Tensile Test: Measures ultimate tensile strength, yield strength, and elongation.
Non-Destructive Testing (NDT):
- Hydrostatic Pressure Test: Verifies the integrity of the pipe under pressure.
- Ultrasonic Test (UT) / Electromagnetic Test: Detects internal and surface imperfections.
- X-Ray Flaw Detection: Provides a detailed internal inspection, especially critical for welded pipes.
Corrosion Testing: Specific tests may be conducted to validate performance in simulated service environments.
Formability Testing:
- Flattening Test: Assesses the ductility and soundness of the weld in welded pipes by flattening a ring sample until the walls meet.
Applications
Due to its robust properties, ASTM A312 904L pipe is specified for the most challenging applications:
- Chemical processing reactors and piping systems (handling sulfuric, phosphoric, and acetic acids)
- Seawater cooling systems and components in desalination plants
- Pulp and paper digesters and bleach plants
- Pollution control and flue gas desulfurization (FGD) systems
- Pharmaceutical and food processing equipment where high purity and corrosion resistance are required
We stock a vast range of sizes from 1/2" to 48" with wall thicknesses from 0.5mm to 30mm. All our pipes undergo rigorous testing, including hydrostatic, ultrasonic, X-ray, and flattening tests, ensuring they deliver superior mechanical properties and corrosion resistance.
Contact Lork Group now for competitive pricing, detailed product information, and a free, no-obligation quotation. Let our expertise in exporting high-quality ASTM A312 904L stainless steel pipes provide the solution for your most challenging applications.
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