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Duplex Stainless Steel UNS S31803 Round Bars

Duplex Steel UNS S31803 Round Bars and Wires

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The Duplex S31803 Round Bar is made from a premium duplex stainless steel alloy that contains a balanced microstructure of austenite & ferrite giving it exceptional mechanical properties. Offering double the yield strength compared to conventional austenitic stainless steel grades. Duplex Steel UNS S31803 Round Bar offers excellent resistance to stress corrosion cracking, pitting & crevice corrosion & used for harsh environments such as marine, offshore, oil & gas & chemical processing industries. These bars conform to ASTM A276 standards and are widely used in structural components, shafts, fasteners, heat exchangers & pressure vessels. They have high strength, corrosion resistance & superior weldability to easily fabricated for custom applications. Whether you are sourcing for construction, petrochemical, shipbuilding, or food processing equipment, our Duplex S31803 Round Bars are built to perform reliably even under extreme conditions.

Duplex S31803 Round Bars & Wire Manufacturer

Kalpataru Piping Solutions is a leading duplex stainless steel manufacturer & trusted supplier of duplex S31803 round bars to Indian & international markets. Designed with precision & manufactured from high-grade raw materials, our duplex steel UNS S31803 round bars are known for their superior mechanical strength, excellent corrosion resistance & long term durability across diverse industrial applications.

Our product range includes hot rolled & cold drawn duplex UNS S31803 steel wire which are available in various diameters & surface finishes to be used in marine, oil & gas, construction & chemical processing industries. We also offer duplex steel bar UNS S31803 in custom sizes, shapes & cut lengths to match project specific needs & fabrication standards.

With a perfect mixture of ferritic and austenitic microstructure, S31803 round bars deliver twice the yield strength of standard austenitic stainless steel grades. These bars offer exceptional resistance to stress corrosion cracking, pitting & crevice corrosion & are used for aggressive environments including high chloride and offshore conditions. We also offer Duplex UNS S31803 Steel Wire and Duplex Steel Bar UNS S31803 in a range of sizes, diameters & finishes like hot rolled, cold drawn & polished, all are customized to meet client-specific requirements. 

As duplex steel UNS S31803 round bar manufacturers, we ensure every batch meets international standards like ASTM A276 and ASTM A479. Our in-house testing, prompt delivery system & global supply network allow us to serve clients in India, South Africa, the Middle East & beyond. Choose Kalpataru Piping Solutions for high-performance duplex UNS S31803 round bars, precision duplex S31803 steel wire, and reliable service from a trusted global supplier.

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Specification of Duplex Stainless Steel UNS S31803 Round Bars

Review detailed specifications of Duplex Steel S31803 round bars covering ASTM standards, tolerance, finish type & applicable lengths for precision manufacturing needs.

Size : ASTM A276, ASME SA276
Standard : ANSI Round Bars and Wires, ASME Round Bars and Wires, BS Round Bars and Wires, DIN Round Bars and Wires, EN Round Bars and Wires, etc.
Designation : EN, DIN, JIS, ASTM, BS, ASME, AISI
Size : 6 mm to 120 mm.
Diameter : 6mm to 350mm Diameter
Thickness : 100 to 6000 mm Length
Finish : Chemical Composition of Duplex Steel UNS S32205 Round Bars and Duplex Steel UNS S32205 Wires
Length : 1 to 6 Meters, Custom Cut Lengths
Form : Round, Square, Hex (A/F), Rectangle, Billet, Ingot, Forging Etc.

Duplex Steel S31803 Round Bars Equivalent Grades

Explore the equivalent materials of UNS S31803 duplex steel, including WNR 1.4462 and other global standards that ensure material compatibility for various industrial applications.

STANDARD WERKSTOFF NR. UNS
Duplex 1803 1.4462 S31803

Duplex Steel UNS S31803 Round Bars Chemical Composition

Check the exact chemical makeup of S31803 duplex round bars featuring balanced chromium, nickel, and molybdenum content that enhances corrosion and stress resistance.

UNS S31803 Ni Cr Mo Mn Si C N S P Fe
min 4.5 22.0 3.0 – – – 0.14 – – –
max 6.5 23.0 3.5 2.0 1.0 0.03 0.2 0.02 0.03 Balance

Duplex Stainless Steel UNS S31803 Round Bars Mechanical Properties

Get the complete mechanical profile of UNS S31803 round bars, including yield strength, tensile strength, elongation, and hardness for high-stress industrial applications.

Grade S31803
Density (g/cm 3) 7.805
Density (lb/in 3) 0.285
Melting Point (°C) 1420 – 1465
Melting Point (°F) 2588 – 2669;

Size Chart of Duplex Steel S31803 Flat Bar

Browse the available sizes and thickness options in our Duplex Steel S31803 flat bar chart to match your specific fabrication and structural design requirements.

sizes(mm) Size(inch) Thickness(mm) Thickness (Inches)
25 1 5 to 20 3/16 – 4/5
22 7/8 17 & 18 2/3 – 5/7
30 1-3/16 5 to 20 3/16 – 4/5
35 1-3/8 5 to 20 3/16 – 3/16
40 1-4/7 5 to 25 3/16 – 1
32 1-1/4 6 to 20 1/4 – 4/5
50 2 5 to 32 3/16 – 1-1/4
55 2-1/16 5 to 25 3/16 – 1
45 1-7/9 5 to 25 3/16 – 1
47 1-6/7 17,25 & 32 2/3, 1 & 1-1/4
57 2-1/4 32 1-1/4
63 2-1/2 10 to 30 3/8 – 1-3/16
60 2-3/8 5 to 35 3/16 – 1-3/8
65 2-5/9 10 to 30 & 35 3/8 – 1-3/16, & 1-3/8
75 3 8 to 25 5/16 – 1
80 3-1/8 8 to 20 5/16 – 4/5
70 2-3/4 6 to 25 & 40 1/4 – 1, & 1-4/7
100 4 8, 10, 12 5/16, 3/8, 1/2
90 3-1/2 8 to 20 5/16- 4/5

Tolerance Standards for Manufacturing Duplex Steel S31803 Flat Bars

Understand tolerance standards for Duplex S31803 flat bars ensuring precision dimension control and consistency for machining and structural applications.

Duplex 2205 Round Bar Tolerance ISO “H” Series in MM
NOMINAL SIZE h5 h6 h7 h8 h9 H10 H11 h12
DIAMETER mm
~ to 3 +0.004/0 +0.006/0 +0.01/0 +0.014/0 +0.025/0 +0.04/0 +0.06/0 +0.1/0
over 6 to 10 +0.006/0 +0.009/0 +0.015/0 +0.022/0 +0.036/0 +0.058/0 +0.09/0 +0.15/0
over 3 to 6 +0.005/0 +0.008/0 +0.012/0 +0.018/0 +0.03/0 +0.048/0 +0.075/0 +0.12/0
over 10 to 18 +0.008/0 +0.011/0 +0.018/0 +0.027/0 +0.043/0 +0.07/0 +0.11/0 +0.18/0
over 30 to 50 +0.011/0 +0.016/0 +0.025/0 +0.039/0 +0.062/0 +0.1/0 +0.16/0 +0.25/0
over 18 to 30 +0.009/0 +0.013/0 +0.021/0 +0.033/0 +0.052/0 +0.084/0 +0.13/0 +0.21/0
over 50 to 80 +0.013/0 +0.019/0 +0.03/0 +0.046/0 +0.074/0 +0.12/0 +0.19/0 +0.3/0
over 120 to 180 +0.018/0 +0.025/0 +0.04/0 +0.063/0 +0.1/0 +0.16/0 +0.25/0 +0.4/0
over 80 to 120 +0.015/0 +0.022/0 +0.035/0 +0.054/0 +0.087/0 +0.14/0 +0.22/0 +0.35/0
over 180 to 250 +0.02/0 +0.029/0 +0.046/0 +0.072/0 +0.115/0 +0.185/0 +0.29/0 +0.46/0

Physical Properties of Duplex Stainless Steel UNS S31803 Round Bars

Learn about key physical properties like density, thermal conductivity & melting range that make S31803 duplex stainless steel ideal for demanding environments.

Thermal Expansion at 20-100°C Modulus of Elasticity Thermal Conductivity (W.m-¹.°C) Density

Thermal

Capacity
13.0×10-6 200 GPa 16 7.80 Kg/m³ 500 J.Kg-¹.K-¹

Dimensions of Duplex S31803 Round Bar

Find standard diameter ranges, cross-sectional shapes and dimensional tolerances available for Duplex Steel S31803 round bars suited for global industries.

Duplex S31803 Round Bar Size Dimensions
Metric US Bar ASTM/ Canadian Japanese
Bar Size Diam. (mm) Bar Size Diam. (Inch) Bar Size Diam. (mm2) Bar Size Diam. (mm)
5 5 #2 0.250 10M 100 6 6
5.5 5.5 #3 0.375 15M 200 10 10
6 6 #4 0.500 20M 300 13 13
7 7 #5 0.625 25M 500 16 16
8 8 #6 0.750 30M 700 19 19
9 9 #7 0.875 35M 1000 22 22
10 10 #8 1.000 45M 1500 25 25
11 11 #9 1.125 55M 2500 29 29
12 12 #10 1.250     32 32
14 14 #11 1.375     35 35
16 16 #12 1.500     38 38
18 18 #13 1.625     41 41
20 20 #14 1.750     44 44
22 22 #15 1.875     48 48
25 25 #16 2.000     51 51
28 28 #18 2.250     57 57
32 32            
36 36            
40 40            
44 44            
50 50      

Sizes of ASTM A276 Duplex Steel S31803 Rods

Discover the available sizes and specifications of ASTM A276 Duplex Steel S31803 rods designed to make use of properties of high strength and corrosion resistance in demanding industrial applications.

Size Chucked true to OD Chucked true to ID
OD,

mm

 ID,

mm

 Max. OD,

mm<

 Min. ID,

mm

 Max. OD,

in.

 Min. ID,

in.

 Max. OD,

mm

 Min. ID,

mm

 Max. OD,

in.

 Min. ID,

in.
32 20 31 21.9 1.220 0.862 30 21 1.185 0.827
32 16 31 18 1.220 0.709 30 17 1.181 0.669
36 25 35 26.9 1.378 1.059 34.1 26 1.343 1.024
36 20 35 22 1.378 0.866 34 21 1.339 0.827
36 16 35 18.1 1.378 0.713 33.9 17 1.335 0.669
40 28 39 29.9 1.535 1.177 38.1 29 1.500 1.142
40 25 39 27 1.535 1.063 38 26 1.496 1.024
40 20 39 22.1 1.535 0.870 37.9 21 1.492 0.827
45 32 44 33.9 1.732 1.335 43.1 33 1.697 1.299
45 28 44 30 1.732 1.181 43 29 1.693 1.
45 20 44 22.2 1.732 0.874 42.8 21 1.685 0.827
50 36 49 38 1.929 1.496 48 37 1.890 1.457
50 32 49 34.1 1.929 1.343 47.9 33 1.886 1.299
50 25 49 27.2 1.929 1.071 47.8 26 1.882 1.024
56 40 55 42 2.165 1.654 54 41 2.126 1.614
56 36 55 38.1 2.165 1.500 53.9 37 2.122 1.457
56 28 55 30.3 2.165 1.193 53.7 29 2.114 1.142
63 50 62 51.9 2.441 2.043 61.1 51 2.406 2.008
63 45 62 47 2.441 1.850 61 46 2.402 1.811
63 40 62 42.2 2.441 1.661 60.8 41 2.394 1.614
63 36 62 38.3 2.441 1.508 60.7 37 2.390 1.457
63 32 62 34.4 2.441 1.354 60.6 33 2.386 1.299
71 56 69.9 58 2.752 2.283 68.9 57 2.713 2.244
71 45 69.9 47.3 2.752 1.862 68.6 46 2.701 1.811
71 40 69.9 42.4 2.752 1.669 68.5 41 2.697 1.614
71 36 69.9 38.5 2.752 1.516 68.4 37 2.693 1.457
75 60 73.8 62 2.906 2.441 72.8 61 2.866 2.402
75 50 73.8 52.2 2.906 2.055 72.6 51 2.858 2.008
75 40 73.8 42.5 2.906 1.673 72.3 41 2.846 1.614
80 63 78.8 65 3.102 2.559 77.8 64 3.063 2.520
80 50 78.8 52.4 3.102 2.053 77.4 51 3.047 2.008
80 45 78.8 47.5 3.102 1.870 77.3 46 3.043 1.811
80 40 78.8 42.6 3.102 1.677 77.2 41 3.039 1.614
85 67 83.7 69.1 3.295 2.720 82.6 68 3.252 2.677
85 55 83.7 57.4 3.295 2.260 82.3 56.0 3.240 2.205
85 45 83.7 47.6 3.295 1.874 82.1 46.0 3.232 1.811
90 71 88.6 73.1 3.488 2.878 87.6 72.1 3.449 2.839
90 63 88.6 65.3 3.488 2.571 87.3 64.0 3.437 2.520
90 56 88.6 58.5 3.488 2.303 87.1 57.0 3.429 2.244
90 50 88.6 52.6 3.488 2.071 87.0 51.0 3.425 2.008
95 75 93.5 77.3 3.681 3.041 92.4 76.2 3.641 2.997
95 67 93.5 69.3 3.681 2.728 92.2 68.0 3.630 2.677
95 50 93.5 52.7 3.681 2.075 91.8 51.0 3.614 2.008
100 80 98.5 82.3 3.878 3.240 97.4 81.2 3.835 3.197
100 71 98.5 73.4 3.878 2.890 97.2 72.1 3.827 2.839
100 63 98.5 65.5 3.878 2.579 97.0 64.0 3.819 2.520
100 56 98.5 58.7 3.878 2.311 96.8 57.0 3.811 2.244
106 80 104.4 82.5 4.110 3.248 103.1 81.2 4.059 3.197
106 71 104.4 73.5 4.110 2.894 103.0 72.1 4.055 2.839
106 63 104.4 65.7 4.110 2.587 102.7 64.0 4.043 2.520
106 56 104.4 58.9 4.110 2.319 102.5 57.0 4.035 2.244
112 90 110.3 92.5 4.343 3.642 109.2 91.4 4.299 3.598
112 80 110.3 82.6 4.343 3.252 108.9 81.2 4.287 3.197
112 71 110.3 73.7 4.343 2.902 108.7 72.1 4.280 2.839
112 63 110.3 65.8 4.343 2.591 108.5 64.0 4.272 2.520
118 90 116.2 92.7 4.575 3.650 114.9 91.4 4.524 3.598
118 80 116.2 82.8 4.575 3.260 114.6 81.2 4.512 3.197
118 71 116.2 73.8 4.575 2.906 114.5 72.1 4.508 2.839
118 63 116.2 66.0 4.575 2.59 114.2 64.0 4.496 2.520
125 100 123.1 102.7 4.846 4.043 121.9 101.5 4.799 3.996
125 90 123.1 92.8 4.846 3.654 121.7 91.4 4.791 3.598
125 80 123.1 82.9 4.846 3.264 121.4 81.2 4.780 3.197
125 71 123.1 74.0 4.846 2.913 121.3 72.1 4.772 2.839
132 106 130.0 108.8 5.118 4.283 128.8 107.6 5.071 4.236
132 90 130.0 93.0 5.118 3.661 128.4 91.4 5.055 3.598
132 80 130.0 83.1 5.118 3.272 128.1 81.2 5.043 3.197
132 71 130.0 74.2 5.118 2.921 121.2 72.1 5.035 2.839
140 112 137.9 115 5.429 4.528 136.6 113.7 5.378 4.476
140 100 137.9 103.1 5.429 4.059 136.3 101.5 5.366 3.996
140 90 137.9 93.2 5.429 3.669 136.1 91.4 5.358 3.598
140 80 137.9 83.3 5.429 3.280 135.8 81.2 5.346 3.197
150 125 147.7 128.1 5.81 5.043 146.5 126.9 5.768 4.996
150 106 147.7 109.3 5.815 4.303 146 107.6 5.748 4.236
150 95 x147.7 98.4 5.815 3.874 145.7 96.4 5.736 3.795
150 80 147.7 83.6 5.815 3.291 145.3 81.2 5.720 3.197
160 132 157.6 135.3 6.205 5.327 156.3 134 6.154 5.276
160 122 157.6 125.4 6.205 4.937 156 123.8 6.142 4.874
160 112 157.6 115.5 6.205 4.547 155.8 113.7 6.134 4.476
160 90 157.6 94.0 6.205 3.701 155.2 91.4 6.110 3.598
170 140 167.4 143.5 6.591 5.650 166 142.1 6.535 5.594
170 130 167.4 133.6 6.591 5.260 165.8 132 6.528 5.197
170 128 167.4 131.6 6.591 5.181 165.7 130 6.524 5.118
170 118 167.4 121.7 6.591 4.791 165.5 119.8 6.516 4.717
170 106 167.4 109.8 6.591 4.323 165.2< 107.6 6.504 4.236
170 100 167.4 103.9 6.591 4.091 165 101.5 6.496 3.996
180 150 177.3 153.6 6.980 6.047 176 152.3 6.929 5.996
180 140 177.3 143.7 6.980 5.657 175.7 142.1 6.917 5.594
180 125 177.3 128.9 6.980 5.075 175.3 126.9 6.902 4.996
180 100 177.3 104.1 6.980 4.098 174.7 101.5 6.878 3.996
190 160 187.1 163.8 7.366 6.449 185.7 162.4 7.311 6.394
190 150 187.1 153.9 7.366 6.059 185.5 152.3 7.303 5.996
190 132 187.1 136 7.366 5.354 185.1 134 7.287 5.276
200 170 197.0 173.9 7.756 6.846 195.6 172.6 7.701 6.795
200 160 197.0 164 7.756 6.457 195.4 162.4 7.693 6.394
200 150 197.0 154.1 7.756 6.067 195.2 152.3 7.685 5.996
200 140 197.0 144.2 7.756 5.677 194.9 142.1 7.673 5.594
212 170 208.8 174.2 8.220 6.858 207.2 172.6 8.157 6.795
212 150 208.8 154.4 8.220 6.079 206.6 152.3 8.133 5.997
212 130 208.8 134.6 8.220 5.299 206.2 132 8.118 5.197
224 180 220.6 184.4 8.685 7.260 218.9 182.7 8.618 7.193
224 140 220.6 144.8 8.685 5.701 217.9 142.1 8.579 5.594
236 190 232.4 194.6 9.150 7.661 230.7 192.9 9.083 7.594
236 150 232.4 155.0 9.150 6.102 229.7 152.3 9.043 5.996
250 200 246.2 204.9 9.693 8.067 244.3 203.0 9.618 7.992
275 200 268.9 205.4 10.587 8.087 266.5 203.0 10.492 7.992

Frequently Asked Questions About Duplex Steel S31803 Round Bars & Wires

What are the dimensions and sizes of Duplex S31803 Round Bars?
Duplex S31803 round bars are available in diameters ranging from 6 mm to 300 mm. They can be supplied in custom lengths & finishes as per project needs conforming to standards like ASTM A276 and ASTM A479.
What are Duplex S31803 Round Bars used for?
Duplex S31803 round bars are widely used in chemical processing, marine environments, oil & gas exploration & offshore structures due to their excellent corrosion resistance & high mechanical strength.
What are Duplex S31803 Round Bars?
Duplex S31803 round bars are solid cylindrical steel products made from Duplex stainless steel UNS S31803. They feature a balanced ferrite, austenite microstructure offering twice the strength of standard austenitic stainless steels & excellent resistance to pitting, crevice corrosion & stress corrosion cracking.

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