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.
