MANUFACTURER & EXPORTER OF STAINLESS STEEL SEAMLESS PIPES & TUBES AND HIGH NICKEL ALLOYS PIPES , HEAT EXCHANGER TUBES
   
  304/L PIPES , 316/L PIPES , 321 PIPES , 317L PIPES , 347 PIPES , 904L TUBES ,
INCONEL 625 TUBES , INCONEL 825 TUBES , MONEL 400 TUBES , A 106 GR B , A336 GR 6
PIPES , API-5LGR.B/X42/X46/X52/X60/X65/X75 , ASTM A335 GR. P-1/P-2/P-5/P-9/P-11/
P-12/P-22/P-91/P-92/P-122

Manufacturer, Supplier & Exporter of 304H tubos de acero inoxidable | 304H Stainless Steel pipa | 304H paip keluli
     
 
Steel Pipes & Tubes
Stainless Steel Pipes & Tubes
ERW Pipes & Tubes
Carbon Steel Pipes & Tubes
Alloy Steel Pipes & Tubes
Mild Steel Pipes & Tubes
Capillary Pipes
Steel Coils and Sheet
Steel Plates
Forged Pipe Fittings
Butt Weld Fittings
Olets & Outlets Fittings
Flanges
Steel Round Bars
Fasteners
Nickel
Cupro Nickel Tubes
Hastelloy Products
Inconel Products
Monel Products
Duplex Steel Products
IBR Products
Copper
Titanium
Brass
Alloy 20 Products
Alluminium Products
Round Bar
   
   

   
   
   
   
 
ASTM A312 AISI TP304H Stainless Steel Pipes & Tubes  
Manufacturer, Supplier & Exporter of 304H Stainless Steel Pipes & Tubes, 304H tubos de acero inoxidable | 304H Stainless Steel pipa | 304H paip keluli in India
Section Links :

Grades
: Type 304 | Type 304L | Type 304H | Type 310 | Type 316 | Type 316L | Type 316H | Type 321 | Type 347  |  Type 410  |


Product Range

Specifications: ASTM A/ASME SA213/A249/A269/A312/A358 CL. I to V ASTM A789/A790
Sizes (Seamless): 1/2” NB - 24” NB
Sizes (ERW): 1/2” NB - 24” NB
Sizes (EFW): 6” NB - 100” NB   


Wall Thickness available:
Schedule 5S - Schedule XXS (heavier on request)

Other Materials Testing:



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




Dimensions:

All Pipes is manufactured and inspected/tested to the relevant standards including ASTM, ASME and API etc.

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.



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. - - - - - 18.0 - 8.o -
max. 0.08 2.0 0.75 0.045 0.030 20.0 - 10.5 0.10
304L min. - - - - - 18.0 - 8.o -
max. 0.030 2.0 0.75 0.045 0.030 20.0 - 12.0 0.10
304H min.

0.04

- - - - 18.0 - 8.o -
max. 0.10 2.0 0.75 0.045 0.030 20.0 - 10.5 -


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.


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/°C) Thermal Conductivity (W/m.K) Specific Heat 0-100°C (J/kg.K) Electrical Resistivity (n.m)
0-100°C 0-315°C 0-538°C at 100°C at 500°C
304/L/H 8000 193 17.2 17.8 18.4 16.2 21.5 500 720


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 Euronorm 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.


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 60°C. Considered resistant to potable water with up to about 200mg/L chlorides at ambient temperatures, reducing to about 150mg/L at 60°C.


Heat Resistance

Good oxidation resistance in intermittent service to 870°C and in continuous service to 925°C. Continuous use of 304 in the 425-860°C 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 500°C and up to about 800°C. 304H will become sensitised in the temperature range of 425-860°C; this is not a problem for high temperature applications, but will result in reduced aqueous corrosion resistance


Heat Treatment

Solution Treatment (Annealing) - Heat to 1010-1120°C and cool rapidly. These grades cannot be hardened by thermal treatment.

 

 



 
       © All Rights reserved by Victor Steel Corporation 2010.                                                   Web Design Company : advedhaworld.com