Stainless Steel Products

Specifications and Range:

• Grade :-"304 , 304L , 304H, 309H, 310H , 316 , 316H ,316L , 316 LN , 317 , 317L , 321 , 321H , 347 , 347H
• Size: 1/2"NB To 24"NB
• Sch :-"SCH 5S , 10S ,10, 20 , 40S , 40 , STD , 60 , 80S , 80 , XS , 100 , 120 , 140 , 160 XXS

Features:

• Precisely design
• Rust resistance
• High strength

Typical applications include:

• Furnace parts
• Oil burner parts
• Carburising boxes
• Heat Treatment baskets and jigs
• Heat Exchangers
• Welding filler wire and electrodes

• Carbon-0.03max
• Manganes-2.00max
• Phosphorus-0.045max
• Sulfur-0.030max
• Silicon-0.75max
• Chromiu-18.0-20.0
• Nickel-8.0-12.0
• Nitroge-0.10max
• Iron-Bal

• Architectural Moulding Trim
• Kitchen Equipment
• Welded Components of Chemical, textile, paper, pharmaceutical chemical industry processing euipment.

Stainless steel stains less easily than other iron-based metals, but it’s not literally “stainless”. Just like standard steel, stainless can get marked up by fingerprints and grease, develop discoloration, and eventually rust. The difference is resilience. Stainless steel can withstand much more time and abuse before showing signs of wear.

All steels have the same basic iron and carbon composition, but stainless steel also contains a healthy dose of chromium—the alloy that gives stainless steel its famous corrosion resistance.

Stainless steel must contain at least 10.5 percent chromium. Depending on the grade, it may contain much higher chromium levels, and additional alloying ingredients like molybdenum, nickel, titanium, aluminum, copper, nitrogen, phosphorous and selenium.

The two most common stainless steel grades are 304 and 316. The key difference is the addition of molybdenum, an alloy which drastically enhances corrosion resistance, especially for more saline or chloride-exposed environments. 316 stainless steel contains molybdenum, but 304 doesn’t.

For outdoor furnishings like rails and bollards, stainless steel is an ideal corrosion-resistant material, but it will only withstand long-term exposure if the grade is appropriate for its environment. 304 is an economical and practical choice for most environments, but it doesn’t have the chloride resistance of 316. The slightly higher price point of 316 is well worth it in areas with high chloride exposure, especially the coast and heavily salted roadways. Each application for stainless steel has its own unique demands, and needs a stainless steel that’s up to the task.

304 stainless steel is the most common form of stainless steel used around the world, largely due to its excellent corrosion resistance and value. It contains between 16 and 24 percent chromium and up to 35 percent nickel, as well as small amounts of carbon and manganese.

The most common form of 304 stainless steel is 18-8, or 18/8, stainless steel, which contains 18 percent chromium and 8 percent nickel.

304 can withstand corrosion from most oxidizing acids. That durability makes 304 easy to sanitize, and therefore ideal for kitchen and food applications. It is also common in buildings, décor, and site furnishings.

304 stainless steel does have one weakness: it is susceptible to corrosion from chloride solutions, or from saline environments like the coast. Chloride ions can create localized areas of corrosion, called "pitting," which can spread beneath protective chromium barriers to compromise internal structures. Solutions with as little as 25 ppm of sodium chloride can begin to have a corrosive effect.

• TP-304/ TP-304L/ TP-304LN/ TP-304H/ TP-304N
• TP-316/ TP-316L/ TP-316LN/TP-316H/ TP-316Ti
• TP-317/ TP-317L/ TP-317LM
• TP-321/ TP-321H
• TP-347/ TP-347H
• UNS S31254
• UNS S31500
• UNS S31803
• UNS S32205
• UNS S32750
• UNS S32760

• Nuclear Power Plants
• Oil Gas
• Petrochemical Refinery
• Chemical Fertilizers
• Power Plant

• DIN X2CrNiMo18164
• WNR 1.4438
• AFNOR ZCNC19-15
• JIS SUS317L
• UNI X2CrNiMo1815
• UNS S31703
• BSI 317S12
• Euronorm X3CrNiMo18164

• Ni-11-15
• Cr-18-20
• C-0.035max
• Mo-3-4
• Fe-Bal
• Mn-2max
• Si-1max
• S-0.030max
• P-0.040max

• Ni-34.0-37.0
• Cr-17.0-20.0
• Fe-Bal
• C-0.08max
• Si-0.75-1.50
• Mn-2.0max
• P-0.030max
• S-0.030max

Grade 316 is the standard molybdenum-bearing grade, second in importance to 304 amongst the austenitic stainless steels. The molybdenum gives 316 better overall corrosion resistant properties than Grade 304, particularly higher resistance to pitting and crevice corrosion in chloride environments.

Grade 316L, the low carbon version of 316 and is immune from sensitization (grain boundary carbide precipitation). Thus it is extensively used in heavy gauge welded components (over about 6mm). There is commonly no appreciable price difference between 316 and 316L stainless steel.

The austenitic structure also gives these grades excellent toughness, even down to cryogenic temperatures.

Compared to chromium-nickel austenitic stainless steels, 316L stainless steel offers higher creep, stress to rupture and tensile strength at elevated temperatures.

Composition

Table 1. Composition ranges for 316L stainless steel.

• 301 Stainless Steel ERW Pipe 302 Stainless Steel ERW Pipe
• 303 Stainless Steel ERW Pipe 304 Stainless Steel ERW Pipe
• 304L Stainless Steel ERW Pipe 304H Stainless Steel ERW Pipe
• 309S Stainless Steel ERW Pipe 310 Stainless Steel ERW Pipe
• 316 Stainless Steel ERW Pipe 316L Stainless Steel ERW Pipe
• 317L Stainless Steel ERW Pipe 321 Stainless Steel ERW Pipe
• 904L Stainless Steel ERW Pipe Stainless Steel ERW Pipe