Stainless Steels


UnifitMetalloysInc (UMI) is one of the leading Manufacturer, Exporter and Supplier of High Quality Stainless Steel Pipes & Tubes, Flanges, Pipe Fittings, Round Bars, Sheets and Plates Etc .Stainless steel is a corrosion resistant steel alloy with a minimum of 10% chromium. There are different grades and surface finishes of stainless steel produced to accommodate the environment in which the material will be implemented. Unlike carbon steel, stainless steel does not rust when exposed to air and moisture due to the sufficient amount of chromium present. The chromium creates an invisible passive film of chromium oxide that will not let oxygen attack the surface and prevents rusting of the iron base

Ferritic Stainless Steels

  • Chromium is their major alloying element
  • Ductility and formability less than austenitic grades
  • Magnetic
  • Highly corrosion resistant, less durable than austenitic
  • Cannot be hardened by heat treatment
  • Contain between 10.5%-27% chromium and very little nickel
  • Common grades: part of the 400 series like 409, 410S, 430

 

Austenitic Stainless Steels

  • Comprise of 70% of total stainless steel production
  • Hardenable by cold working
  • Usually non-magnetic
  • High hardness and yield strength
  • Contain a maximum of 0.015% carbon, minimum of 16% chromium and sufficient nickel and/or manganese
  • Superaustenitic stainless steels (AL-6XN and 254 SMO)  have great resistance to chloride pitting and crevice corrosion
  • Common grades: 300 series like 304, 316, 320, 321, 347,309

Martensitic Stainless Steels

  • Highly machinable
  • Very strong and tough
  • Can be hardened by heat treatment
  • Magnetic
  • Contains chromium (12-14%), molybdenum (0.2-1%), nickel, (0 - < 2%), carbon (0.1 - < 1%)
  • Common grades: 410, 420, 440

 

Grades                          :  SS 304, 304L, 304H, 316, 316L, 316LN, 316Ti, 309, 310S, 317L, 321, 347, 409,
410, 420, 430, 446, 202, 904L, 17-4 PH, 15-5 PH, Duplex 31803/ 32205,
Super Duplex 32750/32760


Specification :

Pipes Specifications

:

ASTM A/ASME SA213/A249/A269/A312/ASTM A789/A790

Sheets/Plates Specification

:

ASTM A240 / ASME SA240

Round bar Specification

:

ASTM, ASME, AISI A 276 , SA 276, A 479, SA 479

Buttweld and Forged Fittings Specification

:

ASTM A182, ASME SA182/ ASTM A403, ASME SA403

Flanges Specification

:

ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44

Fasteners Specification

:

ASTM / ASME A/SA 193 / 194

Dimensions

:

ASTM, ASME and API

 

Size Range Available

 

 

Pipes & Tubes

:

1/2" NB - 16" NB

ERW Pipes & Tubes

:

1/2" NB - 24" NB

EFW Pipes & Tubes

:

6" NB - 100" NB

Sheets and Pates

:

4.0mm - 100mm

Round Bar

:

3.17 MM TO 350 MM DIA

Flanges

:

1/2" NB TO 48" NB

Forged Fittings

:

1/8" NB TO 4" NB.

Buttweld Fittings

:

1/2" NB TO 48" NB.

Fasteners

:

M02 to M33

Schedule

:

SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS

Class

:

2000 LBS, 3000 LBS, 6000 LBS, 9000 LBS, 150#, 300#, 400#, 600#, 900#, 1500# & 2500#

Length

:

Single Random, Double Random & Cut Length.

End

:

Plain End, Beveled End, Treaded

Finish

:

Hot rolled plate (HR), Cold rolled sheet (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated), Bright, Polish & Black

Form

:

Round, Square, Rectangular, Hydraulic, Coils, Foils, Rolls, Plain Sheet, Shim Sheet, Perforated Sheet, Chequered Plate, Strip, Flats, Blank (Circle), Ring (Flange), Round, Square, Hex (A/F), Rectangle, Wire (Coil Form), Wire-mesh, Billet, Ingot, Forging, Socketweld Fittings, Threaded Fittings,

 

 

 

Specialized in

:

Large Diameter Pipes, Shim Sheet, Perforated Sheet, B. Q. Profile, Flanges, Pipe Fittings, Outlets Fasteners etc.


Chemical Composition :

Grade

C

Mn

Si

P

S

Cr

Mo

Ni

N

304

min.

-

-

-

-

-

18.0

-

8.0

-

max.

0.08

2.0

0.75

0.045

0.030

20.0

10.5

0.10


Grade

C

Mn

Si

P

S

Cr

Mo

Ni

N

304L

min.

-

-

-

-

-

18.0

-

8.0

-

max.

0.030

2.0

0.75

0.045

0.030

20.0

12.0

0.10


Grade

C

Mn

Si

P

S

Cr

Mo

Ni

N

310

min.

-

-

-

-

-

24.0

-

19.0

-

max.

0.25

2.0

1.50

0.045

0.030

26.0

 

Grade

C

Mn

Si

P

S

Cr

Mo

Ni

N

310S

min.

-

-

-

-

-

24.0

-

19.0

-

max.

0.08

2.00

1.50

0.045

0.030

26.0

22.0


Grade

C

Mn

Si

P

S

Cr

Mo

Ni

N

316

min.

-

-

-

-

-

16.0

2.00

10.0

-

max.

0.08

2.00

0.75

0.045

0.03

18.0

3.00

14.0

0.10


Grade

C

Mn

Si

P

S

Cr

Mo

Ni

N

316L

min.

-

-

-

-

-

16.0

2.00

10.0

-

max.

0.08

2.00

0.75

0.045

0.03

18.0

3.00

14.0

0.10


Grade

C

Mn

Si

P

S

Cr

Mo

Ni

N

316TI

Min

-

-

-

-

-

16.0

2.00

10.0

-

max

0.08

2

0.75

0.045

0.03

18.0

3.00

14.0

0.1


Grade

C

Mn

Si

P

S

Cr

Mo

Ni

N

317

0.08 max

2 max

1 max

0.040 max

0.03 max

18 – 20

3 – 4

11 – 14

-


Grade

C

Mn

Si

P

S

Cr

Mo

Ni

N

317L

0.035 max

2 max

1 max

0.040 max

0.03 max

18 – 20

3 – 4

11 – 15

-


Grade

C

Mn

Si

P

S

Cr

N

Ni

TI

321

Min

-

-

-

-

-

17.0

-

9.00

5(C+N) 

max

0.08

2.00

1.00

0.045

0.030

19.0

0.10

12.00

0.70 max


Grade

C

Mn

Si

P

S

Cr

N

Ni

TI

321H

Min

0.04

-

-

-

-

17.0

-

9.00

4(C+N)

max

0.08

2.00

0.75

0.045

0.030

19.0

0.10

12.00

0.70 max


Grade

C

Mn

Si

P

S

Cr

N

Ni

OTHER

347

Min

-

-

-

-

-

17.0

-

9.00

Nb=10(C+N)

max

0.08

2.00

1.00

0.045

0.030

20.0

-

13.00

1.0


Grade

C

Mn

Si

P

S

Cr

MO

Ni

N

410

Min

-

-

-

-

-

11.5

-

-

-

max

0.15

1.00

1.00

0.040

0.030

13.5

-

0.75

-


Grade

C

Mn

Si

P

S

Cr

MO

Ni

CU

904L

Min

-

-

-

-

-

19.0

4.00

23.00

1.00

max

0.20

2.00

1.00

0.045

0.035

23.0

5.00

28.00

2.00

 

Mechanical properties

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


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

304L

485

170

40

92

201


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

316

515

205

40%

95

217


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

316L

485

170

40%

95

217


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


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

310S

515

205

40

95

217


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

316H

515

205

35%

75

205


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

321

515

205

40%

95

217


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

321H

515

205

40%

95

217


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

347

515

205

40%

92

201

 

Grade

Tensile Strength (MPa) min

Yield Strength 0.2% Proof (MPa) min

Elongation (% in 50mm) min

Hardness

Rockwell B (HR B)

Brinell (HB)

904L

490

220

35

70-90 typical

-

Rockwell Hardness value range is typical only; other values are specified limits.


Stainless Steel  317

Density

8.0 g/cm3

Melting Point

1454 °C (2650 °F)

Tensile Strength

Psi – 75000 , MPa – 515

Yield Strength (0.2%Offset)

Psi – 30000 , MPa – 205

Elongation

35 %


Stainless Steel  317L

Density

8.0 g/cm3

Melting Point

1454 °C (2650 °F)

Tensile Strength

Psi – 75000 , MPa – 515

Yield Strength (0.2%Offset)

Psi – 30000 , MPa – 205

Elongation

35 %


Grade specifications

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

316

S31600

316S31

58H,   58J

1.4401

X5CrNiMo17-12-2

2347

SUS 316

316L

S31603

S31603

-

1.4404

X5CrNiMo17-12-2

2348

SUS 316L

310

S310009

310S24

-

1.4840

X15CrNi25-20

-

SUH 310

310S

S31008

310S16

-

1.4845

X8CrNi25-21

-

SUS 310S

321

S32100

321S31

58B,  58C

1.4541

X6CrNiTi18-10

2337

SUS 321

321H

S32109

321S51

-

1.4878

X6CrNiTi18-10

-

SUS 321H

347

S34700

347s31

58G

1.4550

X6CrNiNb18-10

2338

SUS 347

904L

N08904

904S13

-

1.4539

X1NiCrMoCuN25-20-5

2562

-

410

S41000

410S21

56A

1.4006

X12Cr13

2302

SUS 410

SS 316TI

1.4571

S31635

SUS 316Ti

Z6CNDT17‐12

320S31

08Ch17N13M2T

X6CrNiMoTi17-12


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