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304H Stainless steel pipe and tube
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304h stainless Steel Pipes Tubes      
Unlike 304L, Type 304H has a higher carbon content making the steel more suitable for use in applications where elevated temperatures are present. It is an austenitic chromium-nickel steel alloy and the greater carbon content delivers an increased tensile and yield strength.  

The material is recommended for use in ASME pressure vessels in working service above 525 0C due to the grade's heat resistant properties.  

Benefits of using 304H Stainless Steel

  • Higher carbon content gives the material greater heat resistant qualities
  • Higher tensile yield strength
  • Greater short and long term creep strength.

304H alloy is commonly found in the oil refining, gas and chemical industry and is used in industrial boilers, pressure vessels, heat exchangers, pipelines and condensers. The material is also used throughout the power generation industry. 

304H Stainless Steel Pipes and Tubes Product Range
304H Stainless Steel Pipes and Tubes Specifications: ASTM A/ASME SA213/A249/A269/A312/A358 CL. I to V ASTM A789/A790
304H Stainless Steel Pipes and Tubes Sizes (Seamless): 1/2" NB - 24" NB
304H Stainless Steel Pipes and Tubes Sizes (ERW): 1/2" NB - 24" NB
304H Stainless Steel Pipes and Tubes Sizes (EFW): 6" NB - 100" NB  

304H Stainless Steel Pipes and Tubes Wall Thickness available:
Schedule 5S - Schedule XXS (heavier on request)

Other Materials Testing:

NACE MR0175, H2 SERVICE, OXYGEN SERVICE, CRYO SERVICE, etc.

304H Stainless Steel Pipes and Tubes Dimensions:
All Pipes is manufactured and inspected/tested to the relevant standards including ASTM, ASME and API etc.

304H Stainless Steel Pipes and Tubes Background

Grade 304 is the standard "18/8" stainless; it is the most versatile and most widely used stainless steel, available in a wider range of products, forms and finishes than any other. It has excellent forming and welding characteristics. The balanced austenitic structure of Grade 304 enables it to be severely deep drawn without intermediate annealing, which has made this grade dominant in the manufacture of drawn stainless parts such as sinks, hollow-ware and saucepans. For these applications it is common to use special "304DDQ" (Deep Drawing Quality) variants. Grade 304 is readily brake or roll formed into a variety of components for applications in the industrial, architectural, and transportation fields. Grade 304 also has outstanding welding characteristics. Post-weld annealing is not required when welding thin sections.
Grade 304L, the low carbon version of 304, does not require post-weld annealing and so is extensively used in heavy gauge components (over about 6mm). Grade 304H with its higher carbon content finds application at elevated temperatures. The austenitic structure also gives these grades excellent toughness, even down to cryogenic temperatures.

304H Stainless Steel Pipes and Tubes Composition
Typical compositional ranges for grade 304 stainless steels are given in table 1.
Table 1. Composition ranges for 304 grade stainless steel

Grade C Mn Si P S Cr Mo Ni N
304 min.
max.
-
0.08
-
2.0
-
0.75
-
0.045
-
0.030
18.0
20.0
- 8.0
10.5
-
0.10
304L min.
max.
-
0.030
-
2.0
-
0.75
-
0.045
-
0.030
18.0
20.0
- 8.0
12.0
-
0.10
304H min.
max.
0.04
0.10
-
2.0
-
0.75
-0.045 -
0.030
18.0
20.0
- 8.0
10.5
-

304H Stainless Steel Pipes and Tubes Mechanical Properties
Typical mechanical properties for grade 304 stainless steels are given in table 2.
Table 2. Mechanical properties of 304 grade stainless steel

Grade Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness
Rockwell B (HR B) max Brinell (HB) max
304 515 205 40 92 201
304L 485 170 40 92 201
304H 515 205 40 92 201
304H also has a requirement for a grain size of ASTM No 7 or coarser.

304H Stainless Steel Pipes and Tubes Physical Properties
Typical physical properties for annealed grade 304 stainless steels are given in table 3.

Table 3. Physical properties of 304 grade stainless steel in the annealed condition

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

304H Stainless Steel Pipes and Tubes Grade Specification Comparison
Approximate grade comparisons for 304 stainless steels are given in table 4.

Table 4. Grade specifications for 304 grade stainless steel

Grade UNS No Old British Euro norm Swedish SS Japanese JIS
BS En No Name
304 S30400 304S31 58E 1.4301 X5CrNi18-10 2332 SUS 304
304L S30403 304S11 - 1.4306 X2CrNi19-11 2352 SUS 304L
304H S30409 304S51 - 1.4948 X6CrNi18-11 - -
These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted.

304H Stainless Steel Pipes and Tubes Corrosion Resistance

Excellent in a wide range of atmospheric environments and many corrosive media. Subject to pitting and crevice corrosion in warm chloride environments, and to stress corrosion cracking above about 600C. Considered resistant to potable water with up to about 200mg/L chlorides at ambient temperatures, reducing to about 150mg/L at 600C.

304H Stainless Steel Pipes and Tubes Heat Resistance

Good oxidation resistance in intermittent service to 8700C and in continuous service to 9250C. Continuous use of 304 in the 425-8600C range is not recommended if subsequent aqueous corrosion resistance is important. Grade 304L is more resistant to carbide precipitation and can be heated into the above temperature range.
Grade 304H has higher strength at elevated temperatures so is often used for structural and pressure-containing applications at temperatures above about 5000C and up to about 8000C. 304H will become sensitized in the temperature range of 425-8600C; this is not a problem for high temperature applications, but will result in reduced aqueous corrosion resistance.
304H Stainless Steel Pipes and Tubes Heat Treatment
Solution Treatment (Annealing) - Heat to 1010-11200C and cool rapidly. These grades cannot be hardened by thermal treatment.



304H Stainless Steel Pipe and Tube Packing

304H Stainless Steel Seamless Pipes and Tubes is sleeved into plastic bag individually, pieces wrapped with water-proof material, bundled with nylon rope. Clear labels are tagged on the outside of the package for easy identification of the quantity and product I.D. Great care is taken during operation and transportation.

SS 304H ASTM A312, ASTM A213, ASTM A269, ASTM A249, ASTM A358 Seamless Pipe packing will be according to international standard in bundles strapped by strips then into containers to avoid any damage.

Delivery: Within 10-25days or asap if we have enough stock

Types of Packaging:
  • - Bundles (hexagonal)
  • - Wooden Boxes
  • - Crates (steel/wooden)
  • - Special crates for U-Bend tubes with each radius separated
  • - Packaging for SS 304H ASTM A312 Seamless Pipe as per customer's requirements
Special Features:
  • - Each bundle covered with plastic for protection against extreme weather.
  • - End of SS 304H ASTM A312 Seamless Pipe protected by plastic caps.
  • - Bundles strapped with plastic strips.
  • - Each radius of U-Bend tube separated by a separator.
  • - Packaging list (laminated) placed with box/crate.

  • 304H Stainless Steel Seamless Pipe Sizes Available in Stock with Price
    • 1/2" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
    • 3/4" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
    • 1" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
    • 1-1/4" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
    • 1-1/2" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
    • 2" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
    • 2-1/2" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
    • 3" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
    • 3-1/2" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
    • 4" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
    • 5" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
    • 6" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
    • 8" NB in ThicknessSchedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
    • 10" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
    • 12" NB in ThicknessSchedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
    • 14" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
    • 16" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS
    • 18" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS

    304H Stainless Steel Seamless Tube Sizes in Thickness SWG/BWG Available in Stock with Price
    • 1/4" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
    • 5/16" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
    • 3/8" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
    • 1/2" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
    • 3/4" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
    • 1" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
    • 1-1/4" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
    • 1-1/2" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
    • 1-3/4" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
    • 2" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
    • 2-1/4" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
    • 2-1/2" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
    • 2-3/4" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
    • 3" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
    • 3-1/2" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
    • 4" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
    • 4-1/2" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge
    • 5" OD in Thickness 10 Gauge, 12 Gauge, 14 Gauge, 16 Gauge, 18 Gauge, 20 Gauge, 22 Gauge

    We export 304H Stainless Steel Seamless Pipe and Seamless Tube to Iran, Iraq, Oman, Qatar, Albania, Muscat, Bahrain, Turkey, Egypt, Maldives, Italy, UAE, Bahrain, Indonesia, Australia, Kuwait, Saudi Arabia, South Africa, Germany, UK, Denmark, Canada, USA, Peru, Brazil, Nizeria, Mexico, Venezuela (Latin America), South America, Russia, kazakhstan etc.


    Raaj Sagar Steels is a well known worldwide exporter of 304H Stainless Steel Seamless Pipes and Tubes, Raaj Sagar Steels is committed to provide each and every customer with the highest standard of customer service. We deals in 304H Stainless Steel Seamless Pipes and Tubes in India & Overseas, offering a wide range of 304H Stainless Steel Seamless Pipes and Tubes.


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