Duplex 31803 Nuts are extensively used in many harsh applications like chemical industries, petrochemical industry, power plant generation, food processing, oil and gas industry, paper and pulp, pollution control, etc. Duplex Steel Grade has excellent corrosion resistance and resistance to cracking and pitting properties. The content of chromium, molybdenum, nickel and nitrogen in the alloy of the Duplex 31803 nuts enhances its mechanical properties.
Duplex 31803 Nuts are easily wieldable. Duplex 31803 Nuts is not uncommon to see the metal used as a practical solution to chloride-induced stress cracking, which is the heel of stainless steel. Duplex 31803 Nuts has a similar thermal expansion to carbon steels, making it possible to combine the two in the same application. These nuts are offered in various grade, finish, and dimensions per demand.
Dalloyed Works is a pioneer manufacturer, supplier, and exporter of Duplex 31803 (F51) Nuts. Dalloyed Works maintains, develops, and continuously improves the quality management systems according to the requirement of standards and provides products of the highest possible quality to the customer. We also offer appropriate labelling on the Duplex F51 Nuts packs to make all the specifications easy to understand.
Next Nuts Products : Duplex Steel S32205 (F60)
Duplex Steel S31803 Nuts Specifications | ASTM A479 A182, ASME SA479, SA182 |
Standard of Duplex Steel S31803 Nuts | DIN, ASTM, BS and all International Standards |
S31803 Duplex Steel Nuts Length | 3 mm to 200 mm |
Duplex S31803 Nut Size | M3 - M56 | 3/6" to 2" | Custom Sizes |
Duplex Steel Grades | Duplex S31803 |
Duplex Steel S31803 Nuts Type | Hex Nut, Heavy Hex Nut, Lock Nut, Nylock Nut, Weld Nut, Dome Nut, Flange Nut, Square Nut, Eye Nut etc. |
STANDARD | UNS | WERKSTOFF NR. |
---|---|---|
ASTM A479/ A182 F51 | S31803 | 1.4462 |
ASME B18.2.2 | Square and Hex Nuts | ASME B18.10 | Track Nuts |
ASME B18.6.3 | Machine Screws Nuts | ASME B18.17 | Wing Nuts |
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
---|---|---|---|---|---|---|---|---|---|---|
S31803 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 22.0 – 23.0 | 3.0 – 3.5 | 4.50 – 6.50 | 0.14 – 0.20 | 63.72 min |
Grade | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
---|---|---|---|---|---|
S31803 | 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 116000 , MPa – 800 | Psi – 80000 , MPa – 550 | 15 % |
Nut Size
(mm) |
Diameter*
(mm) |
Height
(mm) |
||
Hex Nut
|
Jam Nut
|
Nylock Nut
|
||
2
|
4
|
1.6
|
1.2
|
|
2.5
|
5
|
2
|
1.6
|
|
3
|
5.5
|
2.4
|
1.8
|
4
|
4
|
7
|
3.2
|
2.2
|
5
|
5
|
8
|
4
|
2.7
|
5
|
6
|
10
|
5
|
3.2
|
6
|
7
|
11
|
5.5
|
3.5
|
|
8
|
13
|
6.5
|
4
|
8
|
10
|
17
|
8
|
5
|
10
|
12
|
19
|
10
|
6
|
12
|
14
|
22
|
11
|
7
|
14
|
16
|
24
|
13
|
8
|
16
|
18
|
27
|
15
|
9
|
18.5
|
20
|
30
|
16
|
10
|
20
|
Nominal Size or Basic Major Thread Diameter
|
F
|
G
|
H
|
||||||
Width
Across Flats |
Width
Across Corners |
Thickness
|
|||||||
Basic
|
Max
|
Min
|
Max
|
Min
|
Basic
|
Max
|
Min
|
||
1/4
|
.2500
|
7/16
|
.438
|
.428
|
.505
|
.488
|
7/32
|
.226
|
.212
|
5/16
|
.3125
|
1/2
|
.500
|
.489
|
.577
|
.557
|
17/64
|
.273
|
.258
|
3/8
|
.3750
|
9/16
|
.562
|
.551
|
.650
|
.628
|
21/64
|
.337
|
.479
|
7/16
|
.4375
|
11/16
|
.688
|
.675
|
.794
|
.768
|
3/8
|
.385
|
.365
|
1/2
|
.5000
|
3/4
|
.750
|
.736
|
.866
|
.840
|
7/16
|
.448
|
.427
|
9/16
|
.5625
|
7/8
|
.875
|
.861
|
1.010
|
.982
|
31/64
|
.496
|
.473
|
5/8
|
.6250
|
15/16
|
.938
|
.922
|
1.083
|
1.051
|
35/64
|
.559
|
.535
|
3/4
|
.7500
|
1-1/8
|
1.125
|
1.088
|
1.299
|
1.240
|
41/64
|
.665
|
.617
|
7/8
|
.8750
|
1-5/16
|
1.312
|
1.269
|
1.516
|
1.447
|
3/4
|
.776
|
.724
|
1
|
1.0000
|
1-1/2
|
1.500
|
1.450
|
1.732
|
1.653
|
55/64
|
.887
|
.831
|
1-1/8
|
1.1250
|
1-11/16
|
1.688
|
1.631
|
1.949
|
1.859
|
31/32
|
.999
|
.939
|
1-3/8
|
1.3750
|
2-1/16
|
2.062
|
1.994
|
2.382
|
2.273
|
1-11/64
|
1.206
|
1.138
|
1-1/2
|
1.500
|
2-1/4
|
2.250
|
2.175
|
2.598
|
2.480
|
1-9/32
|
1.ASTM A194 GR. 8
|
1.245
|
1-5/8
|
1.6250
|
2-7/16
|
2.438
|
2.356
|
2.815
|
2.686
|
1-25/64
|
1.429
|
1.353
|
1-3/4
|
1.7500
|
2-5/8
|
2.625
|
2.538
|
3.031
|
2.893
|
1-1/2
|
1.540
|
1.460
|
2
|
2.0000
|
3
|
3.000
|
2.900
|
3.464
|
3.306
|
1-23/32
|
1.763
|
1.675
|
2-1/4
|
2.2500
|
3-3/8
|
3.375
|
3.263
|
3.897
|
3.719
|
1-15/16
|
1.986
|
1.890
|
2-1/2
|
2.5000
|
3-3/4
|
3.750
|
3.625
|
4.330
|
4.133
|
2-5/32
|
2.209
|
2.105
|
2-3/4
|
2.7500
|
4-1/8
|
4.125
|
3.988
|
4.763
|
4.546
|
2-3/8
|
2.431
|
2.319
|
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