Carbon Alloy and Stainless Steels                                                          Print


According to the chemical compositions, standard steels can be classified into three major groups: carbon steels, alloy steels and stainless steels.

  • Carbon Steel is composed of alloying elements that don’t exceed these limits: 1% carbon, 0.6% copper, 1.65% manganese, 0.4% phosphorus, 0.6% silicon and 0.05% sulphur.

     
    CARBON STEEL SPECIFICATIONS
    GRADE PIPE SPECS TUBING SPECS WELD FITTING SPECS FORGING SPECS PLATE SPECS
    High Temp. Use  A-106 GR B - A-234 WPB A-105 -
    High Temp. Use  A-53 GR B - - - -
    Low Temp. Use  A-333 GR 6  A-334 GR. 6 A-420 WPL6 A350 LF2 -


     

  • Alloy Steel is a steel which exceed the limit for carbon steel and also contains elements which are not found in carbon steels, such as nickel, chromium (up to 3.99%), cobalt, etc.

     

    ALLOY STEEL SPECIFICATIONS

    GRADE

    PIPE SPECS.

    TUBING
    SPECS.

    WELD
    FITTING SPECS.

    FORGING
    SPECS.

    PLATE
    SPECS.

    Carbon

    A-335 P1

    A-161 T1

    A-234 WP1

    A-182 F1

    A-204 GR. B

    1/2 % Moly

    -

    A-209 T1

    -

    -

    -

    1-1/4 % Chrome

    A-335 P11

    A-199 T11

    A-234 WP11

    A-182 F11

    A-387 GR. 11

    1/2 % Moly

    A-691

    A-200 T11

    -

    -

    -

     

    (1-1/4 % Cr.)

    A-213 T11

    -

    -

    -

    2-1/4 % Chrome

    A-335 P22

    A-199 T22

    A-234 WP22

    A-182 F22

    A-387 GR. 22

    1 % Moly

    A-691

    A-200 T22

    -

    -

    -

     

    (2-1/4 % Cr.)

    A-213 T22

    -

    -

    -

    4-6 % Chrome

    A-335 P5

    A-199 T5

    A-234 WP5

    A-182 F5

    A-387 GR. 5

    1/2 % Moly

    A-691

    A-200 T5

    -

    -

    -

     

    (5 % Cr.)

    A-213 T5

    -

    -

    -

    8-10 % Chrome

    A-335 P9

    A-199 T9

    A-234 WP9

    A-182 F9

    A-387 GR. 9

    1 % Moly

    A-691

    A-200 T9

    -

    -

    -

     

    (9 % Cr.)

    A-213 T9

    -

    -

    -

    3-1/2 % Nickel

    A-333 GR.3

    A-334 GR. 3

    A-420 WPL3

    A-350 LF3

    A-203 GR. D


     

  • Stainless Steel, contains at least 10% chromium, with or without other elements. Based on its structure, stainless steel can be divided into three grades:

  • Austenitic, typically contains 18% chromium and 8% nickel and is widely known as 18-8. Nonmagnetic in annealed condition, this grade can only be hardened by cold working.

  • Ferritic, contains very little nickel and either 17% chromium or 12% chromium with other elements such as aluminum or titanium. Always magnetic, this grade can be hardened only by cold working.
     

  • Martensitic, typically contains 12% chromium and no nickel. This grade is magnetic and can be hardened by heat treatment.

STAINLESS STEEL-MECHANICAL CHARACTERISTICS TABLE

GRADE

ASTM
(PLATES)

UNS NO.

WERKSTOFF

TENSILE STRENGTH
 MIN N/MM2

YEILD POINT MIN N/MM2

ELONGATION
2" MIN %

MAX HARDNESS HB

304

A240

S30400

1.4301

515

205

40

201

304L

A240

S30403

1.4306

485

170

40

201

316

A240

S31600

1.4401

515

205

40

217

316L

A240

S31603

1.4404

485

170

40

217

316TI

A240

S31635

1.4571

515

205

40

217

316LN

A240

S31653

1.4429

600

300

35

190

317L

A240

S31703

1.4438

515

205

40

217

321

A240

S32100

1.4541

515

205

40

217

321H

A240

S32109

1.4878

515

205

40

217

347

A240

S34700

1.4550

515

205

40

201

347H

A240

S34709

1.4961

515

205

40

201

410S

A240

S41008

1.4000

415

205

22

183

253 MA

A240

S30815

1.4893

600

310

40

217

904L

B625

N08904

1.4539

490

215

35

180
 

Welded and Seamless Pipes and Tubes can be supplied in carbon steel, stainless steel and alloy steel grades, in a full range of outer diameter sizes and wall thicknesses. We can deliver these pipes and tubes within 4-5 days in India, due to the strategic locations of our principals’ warehouses.

Sheets and Plates can be supplied in line with international specifications and in thicknesses from 0.20mm to 150mm, and in widths of up to 4,000mm. We can therefore meet the demands of the marine and shipbuilding industries along with all the other process industries. Unlike many other suppliers we can offer boiler quality plates with mill delivery of 4 to 6 weeks.