Stainless Steel

Stainless steels of various kinds are used in thousands of applications

 
 
 
 

There are many type of steels, which differ from each other in the corrosion resistance, which is provided by a specific factor. According to the chemical composition, the stainless steels are classified at ferritic, martensitic, austenitic and austenitic-ferritic.

Jakosti nerez

1.4006 / 410

  • For medium-stressed components, crankshafts, supplied in rods, exceptionally in sheets.
  • hardenable, supplied in annealed or heat treated state QT65, difficult to weld.
  • Martensitic, magnetic, polishable.
  • Corrosion resistant in water and vapour environment and slightly aggressive chlorine-free environment.
  • Strength after heat treatment up to max. 1350 N/mm2, use up to 6000C.

1.4016 / 430

  • For use in interior, decoration, cutlery, delivered in sheets.
  • Delivered in annealed or bright annealed state, weldable.
  • Ferritic, magnetic, polishable.
  • Corrosion resistant in water and vapor environment and slightly aggressive chlorine-free environment.
  • Strength min. 440 N/mm2, use up to 8000C.

1.4021 / 420

  • For highly-stressed components, crankshafts, screws, pull rods, delivered in rods, exceptionally in sheets
  • Well hardenable, delivered in annealed or heat treated state QT650 or QT700, difficult to weld.
  • Martensitic, magnetic, polishable
  • Corrosion resistant in water and vapor environment and slightly aggressive chlorine-free environment.
  • Strength after heat treatment up to max. 1550 N/mm2, use up to 5500C

1.4028

  • For highly-stressed components, crankshafts , delivered in rods
  • Well hardenable, delivered in annealed or heat treated state QT850, difficult to weld.
  • Martensitic, magnetic, polishable
  • Corrosion resistant in water and vapor environment and slightly aggressive chlorine-free environment.
  • Strength after heat treatment up to max. 1750 N/mm2, use up to 5500C

1.4034

  • In hardened condition for tools, knives, surgical instruments, scale blades, crankshafts, delivered in rods and sheets
  • Well hardenable, delivered in annealed state, unweldable.
  • Martensitic, magnetic, polishable
  • Corrosion resistant in water and vapor environment and slightly aggressive chlorine-free environment.
  • Hardness after treatment up to 55 HRC, use up to 5500C

1.4057 / 431

  • For highly-stressed components, crankshafts, screws, pull rods with higher corrosion resistance than other martensits
  • delivered in rods
  • Well hardenable, delivered in annealed or heat treated state QT800, difficult to weld.
  • Martensitic, magnetic, polishable
  • Corrosion resistant in water
  • Corrosion resistant in water and vapour environment and slightly aggressive environment with low content of chloride ions (seaside atmosphere)
  • Strength after heat treatment up to max. 1300 N/mm2, use up to do 6000C

1.4104 / 430 F

  • Suitable for machining on automatic machines
  • Martensitic with sulphur content, magnetic, polishable
  • Corrosion resistant in water and vapour environment

1.4112 /440 B

  • In hardened condition for tools, knives, surgical instruments, scale blades, crankshafts, delivered in rods and sheets
  • Well hardenable, delivered in annealed state, unweldable.
  • Martensitic, magnetic, polishable
  • Corrosion resistant in water and vapour environment and slightly aggressive chlorine-free environment.
  • Hardness after treatment up to 60 HRC, use up to 5000C

1.4122

  • For highly-stressed components, crankshafts , delivered in rods
  • Well hardenable, delivered in heat treated state QT750, unweldable.
  • Martensitic, magnetic, polishable
  • Corrosion resistant in water and vapor environment and slightly aggressive chlorine-free environment.
  • Strength after heat treatment up to max. 1700 N/mm2, use up to 5500C

1.4125

  • In hardened condition for tools, knives, surgical instruments, ball bearings, engine valves, delivered mostly in rods
  • Well hardenable, delivered in heat treated state, unweldable.
  • Martensitic, magnetic, polishable
  • Corrosion resistant in water and vapor environment and slightly aggressive chlorine-free environment.
  • capable of achieving the highest strength, hardness and wear resistance of all stainless alloys after heat treatment.

1.4301 / 304

  • The most commonly used stainless steel, used in the food industry, construction, furniture production, drinking water distribution, WWTP, is characterized by good ductility and cold processing
  • austenitic, chromium-nickel, non-magnetic, weldable, polishable, non-hardenable
  • Can be susceptible to pitting and intercrystalline corrosion in welding areas, resists oxidation up to 3500 C

1.4305 / 303

  • Steel suitable for chip machining on automatic machines
  • austenitic, chromium-nickel with added sulphur, non-magnetic, unweldable, polishable, non-hardenable
  • Corrosion resistance and strength slightly lower than 1.4301
  • Supplied in round, hexagonal and square rods

1.4307 / 304L

  • Variant of steel 1.4301 with reduced carbon content, often both steel qualities are given at certificate as well
  • The same use, due to lower carbon content, is less susceptible to intergranular corrosion

1.4306 / 304 L

  • Variant of 1.4306 steel with increased Nickel content, often demanded by French customers

1.4541 / 321

  • Steel is suitable for the construction of chemical and energy equipment including pressure vessels in an oxidizing environment. For strong inorganic acids only at very low concentrations and normal temperatures.
  • austenitic, chromium-nickel-titanic, non-magnetic, weldable, non-polishable, non-hardenable
  • resists intergranular corrosion, airborne oxidation up to 8500 C, weak inorganic acid solutions and strong inorganic acids

1.4401 / 316

  • Option of steel grade 1.4404 with higher carbon content, higher strength
  • may be susceptible to intergranular corrosion in the welding area

1.4404 / 316L

  • For the construction of pressure vessels and apparatuses in the chemical, pharmaceutical, textile and food industries, where increased resistance to non-oxidising acids is required, or increased product purity, in particular for welded parts
  • austenitic, chromium-nickel-molybdenum, non-magnetic, weldable, polishable, non-hardenable
  • Increased resistance to pitting (chloride) corrosion, resists weak salt solutions and water with higher chlorine content (pools), use up to 4500C

1.4571 / 316 Ti

  • Especially in the building and chemical industries. In many cases, this steel is used to manufacture of pressure vessels. It is suitable for welded components in the chemical, paper and energy industries.
  • austenitic, chromium-nickel-molybdenum-titanic, non-magnetic, weldable, non-polishable, non-hardenable
  • Resistant to intergranular corrosion throughout the critical temperature range. Its strength is resistance to surface corrosion, especially sulphuric acid and phosphoric acid. It also resists spot corrosion. Resistance to oxidation up to 4000

1.4435 / 316 L

  • Compared to grade 1.4404, it has a higher Ni and Mo content, which guarantees higher corrosion resistance, especially spot corrosion.

1.4539 / (904 L)

  • sometimes referred to as superaustenit
  • NiCrMoCu steel, which is characterized by excellent resistance (pitting corrosion or flake corrosion) in aggressive environments (solutions of phosphoric acid, sulphuric acid up to 20 °C of all concentrations, sea water up to 70 ° C). Weldable.
  • Suitable for reactors and other apparatuses in the chemical and paper industry with higher concentrations of aggressive substances in combination with elevated temperature.

1.4462

  • Due to its excellent corrosion properties it is suitable for environment of chlorides and hydrogen sulphide.
  • Use for pipes for the petrochemical industry, drilling platforms, in processes with chlorine-containing solutions and seaside applications.
  • Suitable for heat exchangers, suitable for use in dilute sulphuric acid and in organic acids, especially acetic acid.
  • High strength allows the use of lightweight constructions in the construction industry.
  • Duplex ferrite-austenitic structure, magnetic, weldable, worse machinable.

1.4452

  • Steel has excellent corrosion resistance comparable to austenitic steels.
  • In some cases, even austenitic stainless steels of this type are exceeded due to the presence of Cu.
  • The steel structure after adequate heat treatment is resistant to intergranular corrosion.
  • It also resists corrosion fatigue during cyclic stress in corrosion environment and to corrosion cracking.
  • Due to the high strength after hardening, the steel also resists erosion in the corrosion environment.
  • delivered mostly in rods
  • Supplied in annealed AT or hardened state P1300, difficult to weld.
  • Precipitation hardenable
  • Strength after heat treatment min. 1270N/mm2, use up to 6000C

1.4828 / 309

  • Heat resistant
  • It is resistant to oxidation by air up to the temperature 1000°C. In other environments with higher oxidation ability, the rate of oxidation may rise sharply and the highest application temperature drops to 800°C.
  • austenitic, non-magnetic, polishable

1.4845 / 310S

  • Heat resistant
  • It is resistant to oxidation by air up to the temperature 1050°C. In other environments with higher oxidation capability, the oxidation rate can rise sharply and the highest application temperature drops to 850°C.
  • austenitic, non-magnetic, polishable

1.4841 / 314

  • Heat resistant
  • It is resistant to oxidation by air up to the temperature 1150°C. In other environments with higher oxidation capabilities, the oxidation rate can rise sharply and the highest application temperature drops to 1000°C.
  • austenitic, non-magnetic, polishable

Stainless steels of various kinds are used in thousands of applications, although stainless steel is much more resistant to corrosion than ordinary carbon or alloy steels, in some circumstances it can corrode. In normal atmospheric or water based environments, stainless steel will not corrode as demonstrated by domestic sink units, cutlery, saucepans and work-surfaces.

Sheets

Grade

  • 1.4301/1.4307 (AISI304/304L)
  • 1.4401/1.4404 (AISI316/316L)
  • 1.4541 (AISI321)
  • 1.4841/1.4845 (AISI310/310S)
  • 1.4828 (AISI309)
  • 1.4762 (ASISI446)
  • 1.4016 (AISI430)
  • 1.4003
  • 1.4462

Finish

  • 1D
  • 2E
  • 2B
  • 2R
  • 2G (ground)
  • 2J (brushed)
  • Wet polished
  • Both sides poilhed

Width

  • 1000mm
  • 1250mm
  • 1500mm
  • 2000mm
  • Other sizes on request

Layer

  • PVC coating normal/laser
  • Film: 100 micrometer
  • Color: black/white

Production

  • Cold-rolled
  • Hot-rolled

Standard

  • EN 10088-2-2005 / ASTM A240/A480

Thickness

  • Min: 0.4mm
  • Max: 6.0mm

Rods

Grade

  • 1.4301/1.4307 (AISI304/304L)
  • 1.4401/1.4404 (AISI316/316L)
  • 1.4541 (AISI321)
  • 1.4841/1.4845 (AISI310/310S)
  • 1.4828 (AISI309)
  • 1.4021 (AISI420)
  • 1.4034 (AISI420 A)
  • 1.4057
  • 1.4462

Production

  • Cold drawn
  • Cold drawn & polished
  • Peeled & polished
  • Centerless ground
  • Centerless ground & polished
  • Forged

Diameter range

  • min: 2.0mm
  • max: 560mm

Tolerance

  • H8, H9, H10, H11, K12, K13
  • DIN 1013

Pipes

Grade

  • 1.4301/1.4307 (AISI304/304L)
  • 1.4401/1.4404 (AISI316/316L)
  • 1.4541 (AISI321)
  • 1.4841/1.4845 (AISI310/310S)
  • 1.4828 (AISI309)

Standard

  • EN 10217-7
  • ASTM A312/A358/A778
  • JIS G3459
  • JIS G3468
  • CNS 633
  • CNS 13517
  • ASME B36.19M
  • ASME B36.10M

Finish

  • As Welded (Mill Finish)
  • 180 grit
  • Satin (320 grit)
  • Polish (400 grit)
  • Mirror-Polish (600 grit)

Welding method

  • TIG
  • TIG+Plasma
  • LASER
  • Seamless

Outside diameter

  • min O.D.: 10mm
  • max O.D.: 762mm

Wall thickness

  • min: 1.0mm
  • max: 30.0mm


Marking EN Alternative Marking
Steel Designation Steel number AISI UNS ČSN BS
Ferritic – standard grade
X2CrNi12 1.4003   S40977    
X2CrTi12 1.4512 409 S40900   409S19
X6Cr13 1.4000 410S S41008   403S17
X6CrAl13 1.4002 405 S40500   405S17
X6Cr17 1.4016 430 S43000 17041 430S17
X6CrMo17-1 1.4113 434 S43400   434S17
Ferritic – special grade
X2CrTiNb18 1.4509 441 S43932    
X2CrTiNbVCu22 1.4622   S44330    
Ferritic – heat-resistant grade
X18CrN28 1.4749 446      
X10CrAlSi25 1.4762        
Martensitic – standard grade
X12Cr13 1.4006 410 S41000   410S21
X20Cr13 1.4021 420 S42000 17022 420S29
X30Cr13 1.4028 420 S42000 17023 420S45
X46Cr13 1.4034 420 S42000 17029  
X39CrMo17-1 1.4122        
X3CrNiMo13-4 1.4313   S41500    
X4CrNiMo16-5-1 1.4418        
Martensitic – special grade
X5CrNiCuNb16-4 1.4542   S17400    
Austenitic – standard grade
X10CrNi18-8 1.4310 301 S30100   301S21
X2CrNi18-9 1.4307 304L S30403   304S11
X2CrNi19-11 1.4306 304L S30403 17249  
X5CrNi18-10 1.4301 304 S30400 17240 304S15
X8CrNiS18-9 1.4305 303 S30300 17243 303S31
X6CrNiTi18-10 1.4541 321 S32100 17248 321S31
X2CrNiMo17-12-2 1.4404 316L S31603 17349 316S11
X5CrNiMo17-12-2 1.4401 316 S31600 17346 316S31
X6CrNiMoTi17-12-2 1.4571 316Ti S31635   320S31
X2CrNiMo17-12-3 1.4432 316L S31603   316S13
X2CrNiMo18-14-3 1.4435 316L S31603 17350 316S13
X1NiCrMoCu25-20-5 1.4539   N08904   904S13
Austenitic – special grade
X1CrNi25-21 1.4335 310L      
X3CrNiMo17-13-3 1.4436 316 S31600 17352 316S33
Austenitic – heat-resistant grade
X8CrNiTi18-10 1.4878 321 S32100 17246  
X15CrNiSi20-12 1.4828     17251  
X9CrNiSiNCe21-11-2 1.4835   S30815    
X8CrNi25-21 1.4845 310S S31000 17255 310S24
X15CrNiSi25-21 1.4841 314 S31400 17265