Specification :
- SS Round Bars as per ASTM A 484
- SS Forged Bars as per ASTM A 182
- SS pipe as per ASTM A 312 /249/270/269/213/358
- SS plate as per ASTM A 240
- Available in Seamless Pipes, ERW Pipes, Round Bar, Flange, Fittings, Tee,
Elbow, Reducer, Cap, Fasteners, Sheet, Plate and Tube.
This
stainless steel can be availed in many forms like seamless
pipe, welded pipe, seamless tube, welded tube, bar, wire, sheet, plate,
forgings, olets, pipe fittings and flanges like stainless steel pipes,
stainless steel seamless pipes, stainless steel erw pipes, stainless steel
tube, stainless steel sheet, stainless steel fittings, stainless steel round
bar, stainless steel flange, stainless steel tee, stainless steel elbow,
stainless steel reducer, stainless steel cap, stainless steel plate,
stainless steel fasteners etc.
We manufacture wide range of SS 310, SS 317L, SS 904L and in the form of
plate, round bar, sheet and tube. Also offers
alloy steel, low
alloy steel, high alloy steel, alloy steel plate etc.
Grades – Chemical Composition and Equivalent Standards :
| AISI ASTM |
EN DIN |
C % Max |
Mn % Max |
Si % Max |
S % Max |
P % Max |
Cr % Max |
Ni % Max |
Mo % Max |
Others % |
| 304 |
.1.4301 |
0.08 |
2.00 |
1.00 |
0.030 |
0.045 |
18.00-20.00 |
8.00-11.00 |
- |
- |
| 310 |
1.4841 |
0.25 |
2.00 |
1.50 |
0.030 |
0.045 |
24.00-26.00 |
19.00-22.00 |
- |
- |
| 316 |
1.4401 |
0.08 |
2.00 |
1.00 |
0.030 |
0.045 |
16.00-18.00 |
10.00-14.00 |
2.00-3.00 |
- |
| 321 |
1.4541 |
0.08 |
2.00 |
1.00 |
0.030 |
0.045 |
17.00-19.00 |
9.00-12.00 |
- |
Ti : Min (5xC%) |
| 410 |
1.4006 |
0.15 |
1.00 |
1.00 |
0.030 |
0.040 |
11.50-13.50 |
- |
- |
- |
| 420 |
1.4021 |
0.15 Min |
1.00 |
1.00 |
0.030 |
0.040 |
12.00-14.00 |
- |
- |
- |
| 430 |
1.4016 |
0.12 |
1.00 |
1.00 |
0.030 |
0.040 |
16.00-18.00 |
- |
- |
- |
| 431 |
1.4057 |
0.20 |
1.00 |
1.00 |
0.030 |
0.040 |
15.00-17.00 |
1.25-2.50 |
- |
- |
Duplex alloys were originally created to combat
corrosion problems caused by chloride-bearing cooling waters and other
aggressive chemical process fluids. Called Duplex because of its mixed
microstructure with about equal proportions of ferrite and austenite, duplex
stainless steels are a family of grades, which range in corrosion
performance depending on their alloy content. The chemical composition based
on high contents of Cr and Mo, improves intergranular and pitting corrosion
resistance, respectively. Additions of nitrogen can promote structural
hardening by interstitial solid solution mechanism, which raises the yield
strength and ultimate strength values without impairing toughness. Moreover,
the two-phase microstructure guarantees higher resistance to pitting and
stress corrosion cracking in comparison with conventional stainless steels.
We manufacturers and exports wide range of
duplex pipe, duplex plate,
duplex round bar, duplex sheet, super duplex pipe, super duplex plate, super
duplex round bar and super duplex sheet.
The various Alloys
The development of the Duplex stainless steels has continued, graded for
their corrosion performance depending on their alloy content. Today, modern
duplex stainless steel can be divided into four groups :
Composition of Duplex Stainless Steel :
The table lists the duplex stainless steels covered in ASTM specifications
for plate, sheet, and bar products.
UNS Number
Duplex Grades |
Typeb |
C |
Mn |
P |
S |
Si |
Cr |
Ni |
Mo |
N |
Cu |
Other |
| S31200 |
- |
0.030 |
2.00 |
0.045 |
0.030 |
1.00 |
24.0-26.0 |
5.5-6.5 |
1.20-2.00 |
0.14-0.20 |
- |
- |
| S31260 |
- |
0.03 |
1.00 |
0.030 |
0.030 |
0.75 |
24.0-26.0 |
5.5-7.5 |
2.5-3.5 |
0.10-0.20 |
0.20-0.80 |
W0.10-0.20 |
| S31803 |
- |
0.030 |
2.00 |
0.030 |
0.020 |
1.00 |
21.0-23.0 |
4.5-6.5 |
2.5-3.5 |
0.08-0.20 |
- |
- |
| S32001 |
- |
0.030 |
4.0-6.0 |
0.040 |
0.030 |
1.00 |
22.0-23.0 |
1.00-3.00 |
0.60 |
0.05-0.17 |
1.00 |
- |
| S32205 |
2205 |
0.030 |
2.00 |
0.030 |
0.020 |
1.00 |
19.5-21.5 |
4.5-6.5 |
3.0-3.5 |
0.14-0.20 |
- |
- |
| S32304 |
2304 |
0.030 |
2.50 |
2.50 |
0.030 |
1.00 |
21.5-24.5 |
3.0-5.5 |
0.05-0.60 |
0.05-0.20 |
0.05-0.60 |
- |
| S32520 |
- |
0.030 |
1.50 |
0.035 |
0.035 |
0.80 |
24.0-26.0 |
5.5-8.0 |
3.0-4.0 |
0.20-0.35 |
0.50-2.00 |
- |
| S32550 |
255 |
0.04 |
1.50 |
0.040 |
0.030 |
1.00 |
24.0-27.0 |
4.5-6.5 |
2.9-3.9 |
0.10-0.25 |
1.5-2.5 |
- |
| S32750 |
2507 |
0.030 |
1.20 |
0.035 |
0.020 |
0.80 |
24.0-26.0 |
6.0-8.0 |
3.0-5.0 |
0.24-0.32 |
0.50 |
- |
| S32760 |
- |
0.030 |
1.00 |
0.030 |
0.010 |
1.00 |
24.0-26.0 |
6.0-8.0 |
3.0-4.0 |
0.20-0.30 |
0.50-1.00 |
c |
| S32900 |
329 d |
0.06 |
1.00 |
0.040 |
0.030 |
0.75 |
23.0-28.0 |
2.5-5.0 |
1.0-2.0 |
- |
- |
- |
| S32950 |
- |
0.03 |
2.00 |
0.035 |
- |
- |
- |
- |
- |
- |
- |
- |
These UNS S31803, S32750, S32760 available in pipe, plate, round bar and
sheet.
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