DUPLEX STAINLESS STEEL GRADE 2205 S32750
Product & Characteristic
l High strength, with yield strength, which is twice of 18-8 stainless steel.
l Good pit corrosion resistance and chloride stress corrosion resistance.
l Small tendency of welding heat crack.
l Better heat conductivity, small linear expansion coefficient which is suitable to manufacture line of facilities, tube of heat exchange and clad plate.
l Good processing hardening rate.
l High rate of energy absorption and fine high shock resistance.
Conventional Products
|
Steel grade |
Grade |
Specifications (mm) |
|
Standard |
Application |
|
|
Thickness |
Width |
|||||
|
Duplex series |
TDS2101 S32304 TDS2003 S31803 SUS329J4L S32750 S32906 S32760 |
2B/2D Surface: 0.6-5.0mm No.1 surface: 5.0-100mm |
2B/2D Surface: 30-2000 No.1 surface: 1000-3000 |
6-28MT |
ASTMA240 JIS G EN10028-7 DIN |
Chemical vessels, pulp and papermaking, Nuclear power, Petrochemical Desalination industry. |
*Other sizes can be supply by request.
Chemical Composition
|
Grade |
Classifi- |
Mass Percentage (%) |
|||||||||
|
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Mo |
Cu |
N |
||
|
TDS2101 S32101 1.4162 |
ASTM |
≤0.040 |
≤1.00 |
4.00- 6.00 |
≤0.040 |
≤0.030 |
21.0- 22.0 |
1.35- 1.70 |
0.10- 0.80 |
0.10- 0.80 |
0.20- 0.25 |
|
Typical value |
0.028 |
0.71 |
5.03 |
0.028 |
0.001 |
21.50 |
1.55 |
0.30 |
0.35 |
0.22 |
|
|
S32304 1.4362 |
Typical value |
≤0.030 |
≤1.00 |
≤2.50 |
≤0.040 |
≤0.030 |
21.5- 24.5 |
3.00- 5.50 |
0.05- 0.60 |
0.05- 0.60 |
0.05- 0.20 |
|
Typical value |
0.026 |
0.50 |
1.28 |
0.028 |
0.001 |
23.50 |
4.05 |
0.30 |
0.35 |
0.12 |
|
|
TDS2003 S32003 |
ASTM |
≤0.030 |
≤1.00 |
≤2.50 |
≤0.030 |
≤0.020 |
19.5- 22.5 |
3.00- 4.00 |
1.50- 2.00 |
- |
0.14- 0.20 |
|
Typical value |
0.026 |
0.60 |
1.58 |
0.026 |
0.001 |
21.50 |
3.50 |
1.75 |
- |
0.16 |
|
|
S31803 S32205 1.4462 SUS329J3L |
ASTM S31803 |
≤0.030 |
≤1.00 |
≤2.00 |
≤0.030 |
≤0.020 |
21.0- 23.0 |
4.50- 6.50 |
2.50- 3.50 |
- |
0.08- 0.20 |
|
ASTM S32205 |
≤0.030 |
≤1.00 |
≤2.00 |
≤0.030 |
≤0.020 |
22.0- 23.0 |
4.50- 6.50 |
3.00- 3.50 |
- |
0.14- 0.20 |
|
|
Typical value |
0.025 |
0.55 |
1.2 |
0.028 |
0.001 |
22.50 |
5.40 |
3.20 |
- |
0.17 |
|
|
SUS329J4L |
JIS |
≤0.030 |
≤1.00 |
≤1.50 |
≤0.040 |
≤0.030 |
24.0- 26.0 |
5.50- 7.50 |
2.50- 3.50 |
- |
0.08- 0.30 |
|
Typical value |
0.024 |
0.56 |
1.15 |
0.026 |
0.001 |
25.0 |
6.50 |
3.10 |
- |
0.24 |
|
|
S32750 1.4410 |
ASTM |
≤0.030 |
≤0.80 |
≤1.20 |
≤0.035 |
≤0.020 |
24.0- 26.0 |
6.00- 8.00 |
3.00- 5.00 |
≤0.50 |
0.24- 0.32 |
|
Typical value |
0.026 |
0.55 |
0.78 |
0.026 |
0.001 |
25.5 |
7.40 |
4.10 |
0.30 |
0.28 |
|
|
S32906 |
ASTM |
≤0.030 |
≤1.00 |
≤1.20 |
≤0.030 |
≤0.030 |
28.0- 30.0 |
5.80- 7.50 |
1.50- 2.60 |
≤0.80 |
0.30- 0.40 |
|
Typical value |
0.026 |
0.55 |
0.83 |
0.024 |
0.001 |
29.2 |
6.80 |
2.10 |
0.50 |
0.27 |
|
|
S32706 1.4501 |
ASTM |
≤0.030 |
≤1.00 |
≤1.00 |
≤0.030 |
≤0.010 |
24.0- 26.0 |
6.00- 8.00 |
3.00- 4.00 |
0.50- 1.00 |
0.20- 0.30 |
|
Typical value |
0.026 |
0.55 |
0.78 |
0.028 |
0.001 |
25.5 |
7.20 |
3.50 |
0.75 |
0.26 |
|
l S32706 W：0.50-1.00，testing value 0.65
Mechanical Properties
Mechanical properties at ambient temperature
|
Grade |
Classification |
Rp0.2/MPa |
Rm/MPa |
A/% |
HB |
|
TDS2101 S32101 1.4162 |
ASTM |
≥450 |
≥620 |
≥25 |
≤293 |
|
Typical value |
530 |
720 |
33 |
240 |
|
|
S32304 1.4362 |
ASTM |
≥400 |
≥600 |
≥25 |
≤290 |
|
Typical value |
520 |
710 |
35 |
245 |
|
|
TDS2003 S32003 |
ASTM |
≥450 |
≥620 |
≥25 |
≤293 |
|
Typical value |
530 |
730 |
31 |
235 |
|
|
S31803 S32205 1.4462 SUS329J3L |
ASTM |
≥450 |
≥620 |
≥25 |
≤293 |
|
ASTM |
≥450 |
≥655 |
≥25 |
≤293 |
|
|
Typical value |
550 |
750 |
33 |
255 |
|
|
SUS329J4L |
ASTM |
≥450 |
≥620 |
≥18 |
≤302 |
|
Typical value |
550 |
760 |
28 |
257 |
|
|
S32750 1.4410 |
ASTM |
≥550 |
≥795 |
≥15 |
≤310 |
|
Typical value |
580 |
850 |
31 |
260 |
|
|
S32906 |
ASTM |
≥550 |
≥750 |
≥25 |
≤310 |
|
Typical value |
580 |
850 |
30 |
260 |
|
|
S32706 1.4501 |
ASTM |
≥550 |
≥750 |
≥25 |
- |
|
Typical value |
600 |
870 |
29 |
252 |
The example of cost comparison is as below(The tank of “diameter 18m, height 18m” is made of material 316L, TDS2003 (S32003))
|
Classification |
316L |
TDS2003 |
|
Plate Thickness |
5-16mm |
5-12mm |
|
Material Weights |
72.50MT |
56.66MT |
|
Material Cost |
2.46 Million RMB |
1.75 Million RMB |
|
Welding Cost |
0.90 Million RMB |
0.60 Million RMB |
|
Labor Cost |
1.50 Million RMB |
0.90 Million RMB |
|
Preliminary Total Cost |
4.86 Million RMB |
3.25 Million RMB |
|
Calculation Method |
l 316L density 7.93g/cm3 l S32003 density 7.85g/cm3 l Due to thickness reduction the metal filling quantity, electricity power as well as manpower of lifting, polishing etc can be reduced. |
|
Anti-corrosion:
PREN=%Cr+3.3%(Mo+0.5W)+16%N
The pitting corrosion resistances usually take PREN as an assessment standard for reference.
|
Classification |
Grade |
Cr |
Mo |
N |
PREN |
|
Austenite |
304L |
18.50 |
- |
0.03 |
18.98 |
|
316L |
17.10 |
2.5 |
0.03 |
25.83 |
|
|
317L |
18.20 |
3.10 |
0.03 |
28.91 |
|
|
904L |
20.0 |
4.3 |
0.06 |
35.15 |
|
|
254SMO |
19.7 |
6.05 |
0.20 |
42.87 |
|
|
Duplex |
TDS2101 |
21.50 |
0.30 |
0.22 |
26.01 |
|
S32304 |
23.50 |
0.30 |
0.12 |
26.41 |
|
|
TDS2003 |
21.50 |
1.75 |
0.16 |
32.08 |
|
|
S31803 |
22.50 |
3.20 |
0.17 |
35.78 |
|
|
SUS329J4L |
25.00 |
3.10 |
0.24 |
39.07 |
|
|
S32750 |
25.50 |
4.10 |
0.28 |
43.51 |
|
|
S32906 |
29.2 |
2.10 |
0.27 |
44.23 |
|
|
S32760 |
25.2 |
3.50 |
0.26 |
44.55 |
Critical pitting corrosion temperature (CPT) ℃. Testing standard ASTM G150 (CPT varies according to the differences in the shape of product and the condition of surface polishing)
Welding
Keeping phases balance in heat affected zone(HAZ) is the most important for duplex stainless steel. It can successfully avoid the precipitated phases.
The most of welding methods for austenitic stainless steels are suitable to the duplex stainless steels. Such as SMAW, TIG(GTAW), MIG(GMAW), FCAW, SAW.
General rules for welding:
l No pre-heating of welding.
l Weld interpass temperature ≤150℃, temperature for 2507 ≤100℃.
l Need special welding material for duplex stainless steel.
l Heat input varies with the composition and thickness of duplex stainless steels.
Physical properties
(W/(m. ℃)) Thermal conductivity
|
Grade |
Temperature ℃ |
||||
|
20 |
100 |
200 |
300 |
400 |
|
|
TDS2101 |
15 |
16 |
18 |
19 |
20 |
|
S32304 |
16 |
17 |
18 |
19 |
20 |
|
S31803 |
19 |
19 |
21 |
23 |
24 |
|
S32750 |
16 |
17 |
19 |
20 |
22 |
Processing and molding
Hot process and heat treatment temperature (Celsius degree)
|
|
TDS2101 |
S32304 |
S31803 |
S32750 |
|
Hot process Temp. |
900-1100 |
900-1100 |
950-1150 |
1020-1200 |
|
Heat treatment Temp. |
1020-1080 |
1020-1080 |
1020-1100 |
1050-1120 |
The precipitated phase in duplex stainless steel may result in the embrittlement, which will influence the operation performance. The formation temperature range of Q intermetallic phases is within 600-950C. Forferritic stainless steel, the transformation temperature is among 350-520C (475C brittleness). For this reason, the application temperature for duplex stainless steel should be below 250C.
Without Mo, 2101 duplex stainless steel is not sensitive to intermetallic phases precipitation such as Q phase and so on.
Package
l Application of waterproof and damp-proof materials.
l Damage avoided with protecting plank and shim.
l Coil loosing and scratching prevented by means of vertical and horizontal tying up between coil layers.
l Heavy plate package with water-proof material, strengthened frame to prevent plate from deformation.
Service Promise
l To provide consumers with the personalized designs on composition, propertiesproperty, packing, coil weight and quality certificate.
l Technical support to customers in material selection fabrication.
l Accurate and prompt delivery
l Response to customer’s claim within 24 hours.
Contact Us
Alicia (Ms.) / Sales Manager
Tel: +86-769-85325956
Fax: +86-769-82380569
Mob:+86-159-99718496
Email:[email protected]
Skype:Alicia-steel
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