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 310 tubos de acero inoxidable | 310 Stainless Steel pipa | 310 paip keluli
     
 
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ASTM A213 AISI TP310 Stainless Steel Pipes & Tubes  
Manufacturer, Supplier & Exporter of 310 Stainless Steel Pipes & Tubes, 310 tubos de acero inoxidable | 310 Stainless Steel pipa | 310 paip keluli in India.
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Grades
: Type 304 | Type 304L | Type 304H | Type 310 | Type 316 | Type 316L | Type 316H | Type 321 | Type 347  |  Type 410  |

Grade 310, combining excellent high temperature properties with good ductility and weld ability, is designed for high temperature service. It resists oxidation in continuous service at temperatures up to 1150°C provided reducing sulphur gases are not present. It is also used for intermittent service at temperatures up to 1040°C.
Grade 310S (UNS S31008) is used when the application environment involves moist corrodents in a temperature range lower than that which is normally considered "high temperature" service. The lower carbon content of 310S does reduce its high
temperature strength compared to 310.Like other austenitic grades these have excellent toughness, even down to cryogenic temperatures, although other grades are normally

used in this environment.Grade 310L (and proprietary versions of this grade), is a 0.03% maximum carbon version of 310, sometimes used for very specific corrosive environments, such as urea production.


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
   

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.

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
310 min. - - - - - 24.0 - 19.o -
max. 0.25 2.00 1.50 0.045 0.030 26.0 - 22.5 -
310S min. - - - - - 24.0 - 19.o -
max. 0.08 2.00 1.50 0.045 0.030 26.0 - 22.0 -


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
310 515 205 40 95 217
310S 515 205 40 95 217


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
310/S 7750 200 15.9 16.2 17.0 14.2 18.7 500 720


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    
310 S31000 310S24 - 1.4840 X15CrNi25-20 - SUH 310
31S S31008 310S16 - 1.4845 X8CrNi25-21 2361 SUS 310S
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.

 

 



 
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