ASTM A358 Cl1 Stainless Steel Pipes

Seamless Pipe Suppliers for UNS S31803, ASTM A790 UNS S31803, UNS S31803 Duplex Steel Seamless Pipe.

The main advantage of using duplex stainless steel alloys is that they have superior corrosion resistance properties amongst the other classes. Especially in industries that process both sulfur and chloride ions, the duplex S31803 seamless pipe is advantageous because of its stress-related corrosion cracking properties. Conventional steel pipes have very little resistance to such corrosive ions, so they tend to crack when sulfide or chloride ions are deposited on their walls.

To prevent stress corrosion cracking, ASTM A790 UNS S31803 Seamless Pipe (Welded and Seamless) has been developed. Besides being suitable for these conditions, UNS S31803 pipe suppliers recommend it also for the following conditions: pitting and crevice corrosion solutions. As a matter of fact, seamless S31803 pipes will exhibit exceptional resistance to pitting and crevice corrosion even in highly oxidizing and acidic solutions.

This alloy has a higher pitting resistance equivalent value than alloys like 304 or 316 stainless steel. With excellent impact toughness even at low temperatures, UNS S31803 Duplex Steel Seamless Pipe is a competitive alternative to austenitic stainless steel grades 316 and 317 in terms of price. The alloy is two times stronger than both grades, so the walls of the A790 UNS S31803 pipe can be thinner. In addition to resulting in a lighter-weight S31803 welded pipe, this also results in lower costs.

Pipes made from A790 UNS S31803, seamless S31803 pipe, and welded S31803 pipe

The ASTM A790 seamless pipe specification is UNS S31803

Standard Specification	It conforms to ASTM A 312, ASME SA 312, A790, SA790, ASTM A928 and EN 10216-5.
Size	11” to 6” NB Sch 10s, 40s, 80s, & 160s
Wall Thickness	0.01 to 60 mm
SS Seamless Pipe Length	A single random length of 5 to 7 meters A double random length of 10-12 meters
Seamless SS Pipe Surface Finish	A cold finish, a bright finish, a polished finish, annealing, pickling, or as required by the client
Standard	In addition to JIS, AISI, ASME, ASTM, AMS, GB, DIN, EN, GOST, etc.
Manufacturing types	A seamless joint, a welded joint, an ERW joint, an EFW joint
Manufacturing Shapes	There are four basic shapes: round, square, rectangle, and box
Manufacturing Technology	Formed by heat or cold
Other Grades	446 of the Social Security Act
Inspection, Test Reports	EN In accordance with Section 10204 3.1, Mill Test Certificates are required, along with PMI Test Reports, Chemical Reports, Mechanical Reports, NABL-approved lab reports, and third-party inspection reports.
Technique	Hot Rolled and Cold Rolled

Type of ASTM A790 Pipe

ASTM A790 Seamless Pipe

ASTM A790 Welded Pipe

ASTM A790 Hot Rolled Pipe

ASTM A790 ERW Pipe

Contact Ratna Exports today for a best offer & competitive quotation Of ASTM A790 Seamless Pipe

The UNS S31803 pipe chemical composition

Grade		C	Mn	Si	P	S	Cr	Mo	Ni	N
2205 (UNS S31803)	Min Max	– 0.030	– 2.00	– 1.00	– 0.030	– 0.020	21.0 23.0	2.5 3.5	4.5 6.5	0.08 0.20

The mechanical composition of Duplex S31803 stainless steel pipes

Grade

Tensile Strength

(MPa) min

Yield Strength

0.2% Proof

(MPa) min

Elongation

(% in 50mm) min

Hardness

Rockwell C (HR C)

Brinell (HB)

UNS S31803 / 2205

621

448

31 max

293 max

The equivalent ASTM grade of UNS S31803 pipe

Grade

ASTM

UNS

Old British

Euronorm

Swedish SS

Japanese JIS

Name

2205

ASTM A790

ASTM A789

ASTM A928

UNS S31803

318S13

–

1.4462

X2CrNiMoN22-5-3

2377

SUS 329J3L

Physical properties of ASME SA790 UNS S31803 pipe

Grade 2205

Density

(kg/m3)

Elastic

Modulus(GPa)

Mean Coeff of Thermal

Expansion (μm/m/°C)

Thermal

Conductivity (W/m.K)

Specific

Heat

0-100°C( J/kg.K)

Electrical

Resistivity

(nΩ.m)

0-100°C

0-315°C

0-538°C

at 100°C

at 500°C

UNS S31803

782

190

13.7

14.2

–

418

850

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ASTM A790 SS Welded Pipe Dimensions

PIPE SIZE	OD IN INCHES	A.S.A. Pipe Schedules
PIPE SIZE	OD IN INCHES	5s	5	10s	10	20	30	40s & Std.	40	60	80s & E.H.	80	100	120	140	160	DBL E.H.
1/8	.405	.035 .1383	.049 .1863	.049 .1863	.068 .2447	068 .2447	0.95 .3145	0.95 .3145
1/4	.540	.049 .2570	.065 .3297	.065 .3297	.088 .4248	088 .4248	.119 .5351	.119 .5351
3/8	.675	.049 .3276	.065 .4235	.065 .4235	.091 .5676	.091 .5676	.126 .7338	.126 .7338
1/2	.840	.065 .5383	.065 .5383	.083 .6710	.083 .6710	.109 .8510	.109 .8510	.147 1.088	.147 1.088	.187 1.304	.294 1.714
3/4	1.050	.065 .6838	.065 .6838	.083 .8572	.083 .8572	.113 1.131	.113 1.131	.154 1.474	.154 1.474	.218 1.937	.308 2.441
1	1.315	.065 .8678	.065 .8678	.109 1.404	.109 1.404	.133 1.679	.133 1.679	.179 2.172	.179 2.172	.250 2.844	.358 3.659
1-1/4	1.660	.065 1.107	.065 1.107	.109 1.806	.109 1.806	.140 2.273	.140 2.273	.191 2.997	.191 2.997	.250 3.765	.382 5.214
1-1/2	1.900	.065 1.274	.065 1.274	.109 2.085	.109 2.085	.145 2.718	.145 2.718	.200 3.631	.200 3.631	.281 4.859	.400 6.408
2	2.375	.065 1.604	.065 1.604	.109 2.638	.109 2.638	.154 3.653	.154 3.653	.218 5.022	.218 5.022	.343 7.444	.436 9.029
2-1/2	2.875	.083 2.475	.083 2.475	.120 3.531	.120 3.531	.203 5.793	.203 5.793	.276 7.661	.276 7.661	.375 10.01	.552 13.70
3	3.500	.083 3.029	.083 3.029	.120 4.332	.120 4.332	.216 7.576	.216 7.576	.300 10.25	.300 10.25	.437 14.32	.600 18.58
3-1/2	4.000	.083 3.472	.083 3.472	.120 4.973	.120 4.973	.226 9.109	.226 9.109	.318 12.51	.318 12.51	.636 22.85
4	4.500	.083 3.915	.083 3.915	.120 5.613	.120 5.613	.237 10.79	.237 10.79	.281 12.66	.337 14.98	.337 14.98	.437 19.01	.531 22.51	.674 27.54
4-1/2	5.000	.247 12.53	.355 17.61	.710 32.53
5	5.563	.109 6.349	.109 6.349	.134 7.770	.134 7.770	.258 14.62	.258 14.62	.375 20.78	.375 20.78	.500 27.04	.625 32.96	.750 38.55
6	6.625	.109 7.585	.109 7.585	.134 9.290	.134 9.290	.280 18.97	.280 18.97	.432 28.57	.432 28.57	.562 36.39	.718 45.30	.864 53.16
7	7.625	.301 23.57	.500 38.05	.875 63.08
Medium Type = Wall thickness in inches Bold Type = Steel weight per foot in pounds

Stainless Steel ASTM A790 Welded Pipe Sizes

NPS	OD	SCH 5S	SCH 10S	SCH 40S	SCH 80S
1/4	13.72	–	1.65	2.24	3.02
3/8	17.15	–	1.65	2.31	3.2
1/2	21.34	1.65	2.11	2.77	3.73
3/4	26.67	1.65	2.11	2.87	3.91
1	33.4	1.65	2.77	3.38	4.55
1.25	42.16	1.65	2.77	3.56	4.85
1.5	48.26	1.65	2.77	3.68	5.08
2	60.33	1.65	2.77	3.91	5.54
2.5	73.03	2.11	3.05	5.16	7.01
3	88.9	2.11	3.05	5.49	7.62
3.5	101.6	2.11	3.05	5.74	8.08
4	114.3	2.11	3.05	6.02	8.56
5	141.3	2.77	3.4	6.55	9.53
6	168.28	2.77	3.4	7.11	10.97
8	219.08	2.77	3.76	8.18	12.7
10	273.05	3.4	4.19	9.27	12.7
12	323.85	3.96	4.57	9.53	12.7
14	355.6	3.96	4.78	9.53	12.7
16	406.4	4.19	4.78	9.53	12.7
18	457.2	4.19	4.78	9.53	12.7
20	508	4.78	5.54	9.53	12.7
22	558.8	4.78	5.54	–	–
24	609.6	5.54	6.35	9.53	12.7
26	660.4	–	–	–	–
28	711.2	–	–	–	–
30	762	6.35	7.92	–	–

ASTM A790 Welded Steel Pipe Inventory

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