2017 High quality Ultra Small Stainless Steel Tube - AISI 304L Stainless Steel Sheet Coil From China Suppliers – Sihe

General Properties

Alloy 304L a T-300 series stainless steel austenitic, which has a minimum of 18% chromium and 8% nickel. Type 304L has a carbon maximum is 0.030. It is the standard “18/8 stainless” that is commonly found in pans and cooking tools. Alloys 304L is the most versatile and widely used alloy in the stainless steel family. Ideal for a wide variety of home and commercial applications, Alloys 304L exhibits excellent corrosion resistance and has a high ease of fabrication, outstanding formability. The austenitic stainless steels are also considered to be the most weldable of the high-alloy steels and can be welded by all fusion and resistance welding processes.

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Specifications:  UNS S30403

Applications:

Alloy 304L Stainless Steel is used in a wide variety of home and commercial applications, including:

Food processing equipment, particularly in beer brewing, milk processing, and wine making

Kitchen benches, sinks, troughs, equipment, and appliances

Architectural trim and molding

Automotive and aerospace structural use

Construction material in large buildings

Chemical containers, including for transport

Heat exchangers

Nuts, bolts, screws, and other fasteners in the marine environment

Dyeing industry

Woven or welded screens for mining, quarrying & water filtration

Standards:

ASTM/ASME:  S30403

EURONORM:  1.4303

AFNOR:  Z2 CN 18.10

DIN:  X2 CrNi 19 11

Corrosion Resistance:

Resistance to corrosion in oxidizing environments is a result of the 18 to 19% chromium that the 304 alloys contain.

Resistance to moderately aggressive organic acids is a result of the 9 to 11% nickel that the 304 alloys contain.

At times, alloy 304L may show a lower corrosion rate than the higher carbon Alloy 304; otherwise, the 304, 304L, and 304H may be considered to perform uniformly in most corrosive environments.

Alloy 304L is preferred for use in environments sufficiently corrosive to cause intergranular corrosion of welds and heat-affected zones on susceptible alloys.

Heat Resistance:

Good oxidation resistance in intermittent service to 1600°F and in continuous service to 1690°F.

Continuous use of 304 in the 800-1580°F 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.

Properties of 304 Alloy

Welding Characteristics:

Excellent welding properties; post-weld annealing is not required when welding thin sections. Two important considerations in producing weld joints in the austenitic stainless steels are:

preservation of corrosion resistance

avoidance of cracking

Processing – Hot Forming:

To forge, heat uniformity to 2100 / 2300 °F

Do not forge below 1700 °F

Forging can be air cooled without danger of cracking

Processing – Cold Forming:

Its austenitic structure allows it to be deep-drawn without intermediate annealing, Making this the stainless steel grade of choice in the manufacturing of sinks, hollow-ware and saucepans.

These grades work harden rapidly. To relieve stresses produced in severe forming or spinning, parts should be full annealed or stress relief annealed as soon as possible after forming.

Machinability:

The use of chip breakers is advised since the chips can be stringy. Stainless steel work harden rapidly, heavy positive feeds, sharp tooling, and a rigid set-up should be used.of cut below the work-hardened layer resulting from the previous passes.

Chemical Properties:

 

C

Mn

Si

P

S

Cr

Ni

N

304L

0.03max

2.0max

0.75max

0.45max

0.03max

min: 18.0 max: 20.0

min: 8.0 max: 12.0

0.10 max

Mechanical Properties:

Grade

Tensile Strength ksi (min)

Yield Strength 0.2% ksi (min)

Elongation %

Hardness (Brinell) MAX

Hardness (Rockwell B) MAX

304L

70

25

40

201

92

Physical Properties:

Density
lbm/in3

Thermal Conductivity
(BTU/h ft. °F)

Electrical
Resistivity
(in x 10-6)

Modulus of
Elasticity
(psi x 106

Coefficient of
Thermal Expansion
(in/in)/
°F x 10-6

Specific Heat
(BTU/lb/
°F)

Melting
Range
(°F)

at 68°F: 0.285

9.4 at 212°F

28.3 at 68°F

28

9.4 at 32 – 212°F

0.1200 at 68°F to 212°F

2500 to 2590

 

12.4 at 932 °F

39.4 at 752°F

 

10.2 at 32 – 1000°F

 

 

 

 

49.6 at 1652 °F

 

10.4 at 32 – 1500°F

 

 

 

Surface treatment

Itme

Surface finishing

Surface finishing methods

Main application

NO.1 HR Heat treatment after hot rolling, pickling, or with treatment For without the purpose of the surface gloss
NO.2D Without the SPM Method of heat treatment after cold rolling, pickling surface roller with wool or eventually a light rolling a matte surface processing General materials,building materials.
NO.2B After SPM Giving No.2 processing materials appropriate method of cold light sheen General materials, building materials ( most of the goods are processed )
BA Bright annealed Bright heat treatment after cold rolling , in order to be more shiny, cold light effect Automotive parts, home appliances, vehicles, medical equipment, food equipment
NO.3 Shiny, coarse grain processing The NO.2D or NO.2B processing timber No. 100-120 polishing abrasive grinding belt Building materials, kitchen supplies
NO.4 After CPL The NO.2D or NO.2B processing timber No. 150-180 polishing abrasive grinding belt Building materials, kitchen supplies, vehicles, medical equipment, food equipment
240# Grinding of fine lines The NO.2D or NO.2B processing timber 240 polishing abrasive grinding belt Kitchen appliances
320# More than 240 lines of grinding The NO.2D or NO.2B processing timber 320 polishing abrasive grinding belt Kitchen appliances
400# Close to BA luster The MO.2B timber 400 polishing wheel polishing method Building materials, kitchen utensils
HL(hair lines) Polishing line having a long continuous processing In a suitable size ( usually mostly No. 150-240 grit ) abrasive tape for as long as the hair, having a continuous processing method of polishing line The most common building materials processing
NO.6 NO.4 processing less than the reflection , the extinction NO.4 processing material used for polishing Tampico brushing Building materials, decorative
NO.7 Highly accurate reflectance mirror processing No. 600 of the rotary buff with a polishing Building materials, decorative
NO.8 Highest reflectivity mirror finish Fine particles of abrasive material in order polishing , mirror polishing with a polishing Building materials, decorative, mirrors

Stainless steel  international standard:

INTERNATIONAL  STANDARD:

Approximate Comparative Table
ASTM/ASME ISO USA JAPAN BRITAIN GERMANY FRANCE SWEDEN ITALY INDIA CNS
UNS  No. AISI JIS BS WERKSTOFF DIN NF SIS UNI IS
S20100 A-2 201 SUS201 1.4371 X12CrMnNi1885 Z12CMN17-07AZ 201
S20200 A-3 202 SUS202 284S16 202
S30100 14 301 SUS301 301S21 1.431 X12CrNi177 Z11CN17-08 142331 X12CrNi1707 10Cr17Ni7 301
S30200 12 302 SUS302 302S25 1.43 X12cRnI188 Z12CN18-09 142332 X10CrNiS1809 302
S30300 17 303 SUS303 303S21 1.4305 X10CrNiS189 Z8CNF18-09
S30323 17a 303Se SUS303Se 303S41 Z10CNF18-09 142346 X10CrNiS1809
S30400 11 304 SUS304 304S31 1.4301 X5CrNi1810 Z7CN18-09 142333 X5CrNi1810 04Cr18Ni10 304
S30403 10 304L SUS304L 304S11 1.4306 X2CrNi1911 Z3CN18-10 142352 X2CrNi1811 02Cr18Ni11 304L
S30500 13 305 SUS305 305S19 1.4303 X5CrNi1812 Z8CN18-12 305
S30900 309 SUH309 309S24 1.4828 Z12CN24-13 X16CrNi2314
S30908 309S SUS309S 309S16 309S
S31000 310 SUH310 310S24 1.4841 Z12CN25-20 142361 X6CrNi2520
S31008 H15 310S SUS310S 310S16 1.4845 Z8CN25-10 142361 X6CrNi2520 310S
S31600 20 316 SUS316 316S31 1.4401 X5CrNiMo17122 Z7CND17-11-02 142343 X8CrNiMo1713 04Cr17Ni12Mo2 316
S31603 19 316L SUS316L 316S11 1.4404 X2CrNiMo17132 Z3CND17-12-02 142348 X2CrNiMo1712 02Cr17Ni12Mo2 316L
S31635 21 316Ti SUS316Ti 320S31 1.4571 X6CrNiMoTi17122 Z6CND17-12 142350 316Ti
S31700 317 SUS317 317S16 1.4436 X5CrNiMo17133 Z3CND19-15-04 142367 317
S32100 15 321 SUS321 321S31 1.4541 X6CrNiTi1810 Z6CNT18-10 142337 X6CrNiTi1811 04Cr18Ni10Ti20 321
S34700 16 347 SUS347 347S31 1.455 X6CrNiNb1810 Z6CNNb18-10 142338 X8CrNiNb1811 347
S40300 403 SUS403 403S17 1.4024 X5Cr13 Z12C13 142301 403
S40500 2 405 SUS405 405S17 1.4002 X6CrAl13 Z8CA12 X6CrAl13 405
S40900 1 Ti 409 SUH409 409S19 1.4512 X6CrTi12 Z8CNT12 409
S41000 3 410 SUS410 410S21 1.4006 X10Cr13 Z13C13 142302 X12Cr13 410
S41600 7 416 SUS416 416S21 1.4005 X12CrS13 Z11CF13 X12CrS13
S42000 4 420 SUS420J1 420S29 1.4021 X20Cr13 Z20C13 142304 X30Cr13 420J1
5 SUS420J2 420S45 1.4028 X30Cr13 Z33C13 420J2
S43000 8 430 SUS430 430S17 1.4016 X6Cr17 Z8C17 142320 X8Cr17 05Cr17 430
S43020 8C 430F SUS430F 1.4104 X4CrMoS18 Z8CF17 142383 X10CrS17
S43100 9b 431 SUS431 431S29 1.4057 X20CrNi172 Z15CN16-02 142321 X16CrNi16

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