ASTM A312 TP304H Seamless and Welded Pipe
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Gnee is a leading manufacturer, stockist, and supplier of ASTM A312 TP 304H stainless steel pipes, committed to providing high-quality products, fast response service, and 24/7 support to global customers, ensuring complete customer satisfaction.
Our 304H pipes are made from an austenitic alloy containing 18–20% chromium, 8–10.5% nickel, and a higher carbon content of 0.04–0.10% (UNS S30409 / WNR 1.4948). We supply both seamless and welded pipes.ASTM A312 TP 304H seamless pipes offer excellent corrosion resistance in a wide range of corrosive environments. Our ASME SA 312 304H welded pipes are manufactured using a longitudinal welding process, featuring a weld seam along the cross-section. They are available with outer diameters from 6.35 to 114.3 mm, wall thicknesses from 0.8 to 12.7 mm, and lengths up to 26 m, with different shapes and sizes customizable to meet specific project requirements.
AISI 304H Schedule 40 pipes are widely used in drainage, irrigation, and cold water systems. All products, including 1.4948 stainless steel polished pipes, are manufactured using premium raw materials and the latest production technologies. Pipes are available in round, rectangular, and square sections.SA 312 TP 304H square pipes are easy to weld (post-weld annealing can be performed to restore corrosion resistance if sensitization occurs).ASTM A312 Gr TP 304H rectangular pipes offer high strength and durability and are suitable for refineries, boiler tubing, cooling equipment, and power plants.
ASTM A312 TP 304H Stainless Steel Pipes Specifications
| Specifications | : | ASTM A 312 / ASME SA 312 |
| Dimensions | : | ASTM, ASME and API |
| SS 304H Pipes | : | 1/2″ NB – 16″ NB |
| ERW 304H Pipes | : | 1/2″ NB – 24″ NB |
| EFW 304H Pipes | : | 6″ NB – 100″ NB |
| Size | : | 1/8″NB TO 30″NB IN |
| Specialized in | : | Large Diameter Size |
| Schedule | : | SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
| Type | : | Seamless / ERW / Welded / Fabricated / LSAW Pipes |
| Form | : | Round, Square, Rectangular, Hydraulic Etc |
| Length | : | Single Random, Double Random & Cut Length. |
| End | : |
Plain End, Beveled End, Treaded |
304H Equivalent Grades:
| GRADE | UNS | WERKSTOFF NR. | JIS | AFNOR | BS | GOST | EN | SS |
| USA | GERMAN | JAPAN | RUSSIAN | BRITISH | RUSSIAN | EUROPE | SWEDISH | |
| ASTM A312 304H | S30409 | 1.4948 | SUS 304H | – | 304S11 | – | X5CrNi18-10 | 2332 |
Chemical Composition of TP304H:
| ASTM A312 | Si | C | Mn | P | S | Cr | Ni | |
| 304H | min. | – | – | – | – | – | 18.0 | 8.0 |
| max. | 0.75 | 0.10 | 2.0 | 0.045 | 0.03 | 20.0 | 10.5 | |
Mechanical Properties:
| SUS | Tensile Strength minimum (MPa) | Yield Strength 0.2% Proof minimum (MPa) | Elongation minimum (% in 50mm) | Hardness | |
| Rockwell B (HR B) maximum | Brinell (HB) maximum | ||||
| 304H | 515 | 205 | 40 | 92 | 201 |
Physical Properties:
| Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (m/m/0C) | Thermal Conductivity (W/m.K) | Specific Heat 0-1000C (J/kg.K) | Electrical Resistivity (n.m) | |||
|---|---|---|---|---|---|---|---|---|---|
| 0-1000C | 0-3150C | 0-5380C | at 1000C | at 5000C | |||||
| 304/L/H | 8000 | 193 | 17.2 | 17.8 | 18.4 | 16.2 | 21.5 | 500 | 720 |
Applications:
Off-Shore Oil Drilling Companies
Power Generation
Petrochemicals
Gas Processing
Specialty Chemicals
Chemical Equipment
Sea Water Equipment
Heat Exchangers
Condensers
ASTM A312 TP 304H Stainless Steel Pipe Price List
astm a312 tp304h seamless stainless steel pipes
US $2500-4100 / Ton (FOB Price)
seamless pipe astm a312 tp304h
US $600-1200 / Ton (FOB Price)
asme sa312 tp a312 304h stainless steel welded pipe
US $850-2200 / Metric Ton (FOB Price)
sa312 tp304h seamless pipe
US $1.5-9 / Kilogram (FOB Price)
astm a312 gr. tp 304h Welded Pipe
US $500-1000 / Ton (FOB Price)
Material Testing: The pipes undergo testing and evaluation before shipment. Mechanical testing, hardness testing, positive material identification (PMI), intergranular corrosion testing (IGC), flaring tests, and flattening tests are performed. These tests are crucial in ensuring product quality.
Documents Provided: The ASTM pipes come with various documents that help verify product quality. These include welding procedure specifications, fumigation certificates, NABL-accredited laboratory reports, packing lists including net and gross weight, warranty letters, and commercial invoices.
Packing:
Wooden pallets or cases, waterproof paper and plastic coverage, Or as to clients' requirements.
Seamless Welded 24" Diameter 120Mm 28Mm 304H Seamless Stainless Steel Pipe standard export seaworthy packing or as customers' requirement
