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Alloy Steel Pipe Manufacturer in China

Home|Alloy Steel Pipe

Supplier of Low Alloy Steel Seamless Pipe in China, With Several Grades

Alloy Steel Pipe

Manufacturer of AS Pipe & ASTM A335 Alloy Steel Seamless Pipe in Wenzhou, used for high-temperature applications, Refer Specification.

Alloy Steel Pipe Specification

pipe size icon

Alloy Steel moly pipe Sizes

  • OD: 1/8” – 30”" NPS
  • WT:2.77 – 12.7mm
  • Wall thickness: 1- 15mm
welded pipe size icon

Chrome Seamless Pipe Length

  • 12 meters
  • 6 meters
  • Single random Length: 4 – 8 meters
pipe manufacturing process

chromoly pipe Manufacturing Process

  • ERW
  • Seamless
  • Fabricated
Pipe Surface Finish

ASTM A335 alloy steel pipe Surface Finish

  • Polished
  • Annealing
  • Mirror
Pipe Testing

Alloy Steel Boiler Pipe Testing

  • Ultrasonic
  • Chemical
  • Mechanical
  • PMI
Standards

Seamless alloy steel pipe Standards

  • GB, SUS, AISI,ASME
  • ASTM A691 | ASME SA 691
  • DIN, API, EN, UNS
Applications

chromoly steel pipe Applications

  • Nuclear reactors
  • Power generation applications
  • Spacecraft
  • High Pressure environment
Documentation

Chrome Alloy Steel Pipes Documentation

  • NABL Approved Lab Reports
  • Raw Material Test Reports
Origins

Alloy Steel chromoly pipe Origins

  • American
  • Russia, India
  • China
  • Janpanese
pipe Types

Types of Low Alloy Steel Pipe

  • Rectangle
  • Square
  • Hex
  • Round
Packaging

ASTM A335 alloy steel pipe Packaging

  • Bubble Wraps
  • Bundled
  • Wooden Box
Advantages

Seamless alloy steel pipe Advantages

  • Exceptional Durability
  • Low Maintenance Needs
  • Corrosion Resistance
Measurement

Measurement of Low Alloy Steel Pipe

  • Straightness, Ovality
  • Outer diameter
  • Inner diameter
  • Thickness, Length
Disadvantages

IBR Alloy Steel Pipe Disadvantages

  • high melting point
  • cost
  • maintenance or repair
  • limited flexibility
End Types

SS pipe End Types

  • Coupled, Bevel end
  • Cut groove, Threaded
  • Plain end, Roll groove
Features

Features of Incoloy Alloy 825 Ball Valve

  • Wear resistance
  • Cost-effective
  • Heat resistance

Types of Alloy Steel Boiler Pipe


Alloy Steel Pipe Supplier in China Offers a Large Range of Commonly Used Pipe Types.


Alloy Steel moly pipe

Alloy Steel moly pipe

Chrome Seamless Pipe

Chrome Seamless Pipe

Low Alloy Steel Pipe

Low Alloy Steel Pipe

chromoly pipe

chromoly pipe

chromoly steel pipe

chromoly steel pipe

ASTM A335 alloy steel pipe

ASTM A335 alloy steel pipe

Alloy Steel chromoly pipe

Alloy Steel chromoly pipe

Alloy Steel Boiler Pipe

Alloy Steel Boiler Pipe

Seamless alloy steel pipe

Seamless alloy steel pipe


Weight Chart of chromoly steel pipe

SIZE NPS PIPE I.D. WALL THICK PIPE O.D. STANDARD TO XXHY WEIGHT PER FOOT GALLON CAPACITY PER LINEAR FOOT SCHEDULE PIPE # SECTION MODULUS
2 2.157 0.109 2.375   2.64 .1898 10 .4205
  1.503 0.436   XXHY 9.04 .0922   1.1043
  2.067 0.154   STD 3.66 .1743 40 .5606
  1.687 0.344     7.47 .1161 160 .9806
  1.939 0.218   XHY 5.03 .1534 80 .7309
  1.813 0.281     6.29 .1344   .8666
  1.875 0.250     5.68 .1434   .8045
6 6.407 0.109 6.625   7.59 1.6748 5 3.5769
  4.375 1.125     66.14 .7809   23.1237
  6.357 0.134     9.30 1.6488 10 4.3475
  6.001 0.312     21.06 1.4688   9.3416
  6.313 0.156     10.79 1.6260   5.0107
  4.625 1.000     60.13 .8727   21.7719
  4.897 0.864   XXHY 53.21 .9784   20.025
  6.249 0.188     12.94 1.5937   5.9351
  5.187 0.719     45.39 1.0977 160 17.8243
  5.375 0.625     40.09 1.1787   16.1821
  6.219 0.203     13.94 1.5780   6.3804
  5.501 0.562     36.43 1.2346 120 14.9806
  6.187 0.219     15.00 1.5620   6.8261
  5.761 0.432   XHY 28.60 1.3541 80 12.224
  5.875 0.375     25.05 1.4082   10.893
  5.625 0.500     32.74 1.2909   13.711
  6.125 0.250     17.04 1.5306   7.6905
  5.937 0.344     23.10 1.4391   10.111
  6.065 0.280   STD. 18.99 1.5008 40 8.4958
1/2 0.622 0.109 0.84 STD 0.85 .0158 40 .0407
  0.252 0.294   XXHY 1.72 .0026   .0577
  0.464 0.188     1.31 .0088 160 .0528
  0.546 0.147   XHY 1.09 .0122 80 .0478
5 5.187 0.188 5.563   10.80 1.0979   4.1161
  4.063 0.750   XXHY 38.59 .6734   12.0954
  5.125 0.219     12.51 1.0716   4.7279
  4.313 0.625     32.99 .7590 160 10.7976
  4.875 0.344     19.19 .9696   6.9358
  5.047 0.258   STD. 14.63 1.0391 40 5.4500
  4.563 0.500     27.06 .8495 120 9.2534
  5.001 0.281     15.87 1.0204   5.8644
  4.813 0.375   XHY 20.80 .9449 80 7.4300
  4.939 0.312     17.51 .99647   6.4074
3/4 0.824 0.113 1.05 STD 1.13 .0277 40 .0705
  0.434 0.308   XXHY 2.44 .0077   .1103
  0.612 0.219     1.95 .0153 160 .1006
  0.742 0.154   XHY 1.48 .0225 80 .0853
2 1/2 2.635 0.120 2.875   3.53 .2833 10 .6870
  2.375 0.250     7.02 .2301   1.2468
  1.771 0.552   XXXHY 13.71 .1280   1.9971
  2.469 0.203   STD. 5.80 .2487 40 1.0640
  2.125 0.375     10.02 .1842 160 1.6371
  2.443 0.216     6.14 .2435   1.1169
  2.323 0.276   XHY 7.67 .2202 80 1.3386
4 4.260 0.120 4.5   5.62 .7404 10 1.7612
  3.152 0.674   XXHY 27.57 .4054   6.7927
  4.188 0.156     7.24 .7156   2.2354
  3.438 0.531     22.53 .4822 160 5.8997
  4.124 0.188     8.67 .6942   2.6296
  3.938 0.281     12.67 .6326 60 3.7021
  3.624 0.438     19.02 .5361 120 5.1790
  4.094 0.203     9.32 .6838   2.8173
  3.826 0.337   XHY 15.00 .5972 80 4.2713
  4.062 0.219     10.02 .6725   3.0184
  4.000 0.250     11.36 .6528   3.3611
  3.876 0.312     13.97 .6126   4.0273
  4.026 0.237   STD. 10.80 .6613 40 3.2145
1 1.049 0.133 1.315 STD 1.68 .0449 40 .1328
  0.599 0.358   XXHY 3.66 .0146   .2136
  0.815 0.250     2.85 .0271 160 .1904
  0.957 0.179   XHY 2.17 .0374 80 .1606
3 1/2 3.760 0.120 4.0   4.98 .5768 10 1.3776
  3.438 0.281     11.17 .4821   2.8562
  3.548 0.226   STD. 9.12 .5136 140 2.3939
  3.364 0.318   XHY 12.52 .4617 80 3.1400
  2..728 0.636   XXHY 22.87 .3085   4.8795
  3.500 0.250     10.02 .4998   2.6001
1 1/4 1.380 0.140 1.66 STD 2.27 .0777 40 .2346
  0.896 0.382     5.22 .0328   .4110
  1.160 0.250     3.77 .0549 160 .3421
  1.278 0.191   XHY 3.00 .0666 80 .2913
3 3.260 0.120 3.50   4.34 .4336   1.0411
  3.124 0.188     6.66 .3984   1.5342
  2.624 0.438     14.34 .2811 160 2.8774
  3.068 0.216   STD. 7.58 .3840 40 1.7241
  2.300 0.600   XXHY 18.6 .2158   3.4243
  2.938 0.281     9.67 .3521   2.1207
  3.188 0.156     5.58 .4147   1.3122
  3.000 0.250     8.69 .3672   1.9372
  3.156 0.172     6.12 .4064   1.4265
1 1/2 1.610 0.145 1.90 STD 2.72 .1058 40 .3262
  1.100 0.400     6.41 .0494   .5977
  1.338 0.281     4.86 .0730 160 .5079
  1.500 0.200   XHY 3.63 .0918 80 .4118

Wall Thickness Chart Of Alloy Steel Seamless Pipe

NPS [DN] DESIGNATOR TOLERANCE, % FROM SPECIFIED
Under Over
Above 2 1/2  [65], t/D > 5% 12.5% 15.0%
Above 2 1/2  [65], t/D < or = 5% 12.5% 22.5%
1/8 to 2 1/2 [6 to 65] incl., all t/D ratios 12.5% 20.0%
(t = SPECIFIED WALL THICK; D = SPECIFIED OUTSIDE DIA)


Applications Of Chrome Alloy Steel Pipes

Applications Of Chrome Alloy Steel Pipes

Applications

  • Construction
  • Water and Wastewater Treatment
  • Oil and Gas Industry
  • Food Industry
  • Power Plants
  • Biotechnology
  • Chemical Processing
  • Medical Equipment




Pressure Rating of Alloy Steel Pipe

MAX ALLOWABLE PRESSURE (PSI)
OD NPS SCHEDULE
(IN) (IN) 30 20 10 STD 160 40 120 XS 100 80 140 60 XXS
2.875 2 1/2 3460 6391 3460 4704 4704 9408
34 34 901 721 450 540 992
0.54 1/4 7985 7985 10798 10798
4 3 1/2 2769 2769 3896 3896
22 22 1114 835 557 835 4733 3619 1114 3063 2506 4176 1949
6.625 6 2071 5318 2071 4157 3195 3195 6390
0.675 3/8 6606 6606 9147 9147
2.375 2 3177 7097 3177 4498 4498 8995
0.84 1/2 6358 10908 6358 8575 8575 17150
8.625 8 1574 1420 1829 5147 1829 4085 2841 3375 2841 4613 2307 4971
1.05 3/4 5273 10220 5273 7187 7187 14373
1.315 1 4956 9316 4956 6670 6670 13340
30 30 1021 817 510 613 817
1.66 1 1/4 4133 7380 4133 5638 5638 11276
42 42 729 583 438 875
12.75 12 1268 961 1441 5042 1560 3843 1922 3244 2644 4324 2160 3843
18 18 1192 849 681 1021 4848 1530 3743 1361 3147 2553 4252 2042
1.9 1 1/2 3739 7247 3739 5158 5158 10316
20 20 1225 919 613 919 4824 1455 3675 1225 3138 2526 4288 1989
3.5 3 3024 6132 3024 4200 4200 8400
16 16 1148 956 766 1148 4882 1531 3733 1531 3157 2585 4404 2009
4.5 4 2581 5782 2581 4769 3670 3670 7339
32 32 957 766 478 574 1054
5.563 5 2273 5505 2273 4404 3303 3303 6606
36 36 851 681 425 510 1021
14 14 1313 1092 875 1313 4921 1533 3829 1750 3283 2625 4375 2079
24 24 1147 766 510 766 4786 1405 3700 1021 3126 2489 4210 1978
10.75 10 1399 1140 1664 5128 1664 3847 2279 3277 2708 4558 2279 4558

Diameter Tolerances Of Chrome Alloy Steel Pipes

Alloy Steel Pipes Over Under
NPS [DN] inch mm inch mm
Over 4 - 8 / DN 100 - 200 1/16 (0.062) 159 1/32 (0.031) 0.79
Over 8 - 12 / DN 200 -300 3/32 (0.093) 2.38 1/32 (0.031) 0.79
Over 11/2 - 4 / DN 40 - 100 1/32 (0.031) 0.79 1/32 (0.031) 0.79
1/8-11/2 / DN 6 -40 1/64 (0.015) 0.4 1/64 (0.015) 0.4
Over 12 / > DN 300 +/- 1% of the specified OD

Stock of Alloy Steel Pipe Grades

Our Ready Stocks


ASTM A335 alloy steel pipe Chemical Composition

Grade AISI 4140 P-9 P-22 P-5 P-91 P-11 AISI 4130
Molybdenum 0.15 - 0.25 0.90 - 1.10 0.87 - 1.13 0.45 -0.65 0.85 - 1.05 0.44 - 0.65 0.15-0.25
Carbon 0.380 - 0.430 0.15 max 0.05 - 0.15 0.15 max 0.08 - 0.12 0.05 - 0.15 0.28-0.33
Sulfur, max 0.040 0.025 0.025 0.025 0.010 0.025 0.025
Chromium 0.80 - 1.10 8.00 - 10.00 1.90 - 2.60 4.00 - 6.00 8.00 - 9.50 1.00 - 1.50 0.80-1.10
Manganese 0.75 - 1.0 0.30 - 0.60 0.30 - 0.60 0.30 - 0.60 0.30 - 0.60 0.30 - 0.60 0.40-0.60
Silicon 0.15 - 0.30 0.25 - 1.00 0.50 max 0.50 max 0.20 -0.50 0.50 - 1.00 0.15-0.35
Phosphorous, max 0.035 0.025 0.025 0.025 0.020 0.025 0.035

Alloy Steel Boiler Pipe Equivalent Chart

ASTM A335/ SA 335 Grade EN UNS
P22 EN 10216-2 10CrMo9-10 K21590
P5 EN 10216-2 13CrMo4-5 K41545
P9 EN 10216-2 10CrMo9-10 S50400
P91 EN 10216-2 X10CrMoVNb9-1 K91560
P11 EN 10216-2 13CrMo4-5 K11597
AISI 4130 - G41300
AISI 4140 - G41400

Alloy Steel moly pipe Mechanical Properties

GRADE ELONGATION (%) YIELD STRENGTH (MPA) TENSILE STRENGTH (MPA)
P5 ≥ 30 ≥ 205 415 - 585
P9 ≥ 30 ≥ 205 415 - 585
P11 ≥ 30 ≥ 205 415 - 585
P22 ≥ 30 ≥ 205 415 - 585
P91 ≥ 20 ≥ 415 585 - 760
AISI 4140 25.70% 415 MPa 655 MPa
AISI 4130 20 % 460 MPa 560 MPa

Hardness Chart Of ASTM A335 alloy steel pipe

Alloy steel grades Hardness (Brinell Hardness, HB)
P5 187-255
P9 179-217
P22 163-207
P11 163-207
P91 190-250
AISI 4130 90–96
AISI 4140 197-330

Chromoly Steel Pipe Manufacturing Process

Chromoly Steel Pipe Manufacturing Process

Manufacturing Process

  • Heating
  • Shaping
  • Rolling the Steel Into a Cylindrical Shape
  • Finishing process



What Makes Yaye Industrial Wenzhou Alloy Steel Pipe Superior to Others ?

  • Made by Adding Additional Elements Like Chromium
  • Nickel, Molybdenum, and Vanadium to the Base Steel
  • Higher strength-to-weight ratio
  • High-pressure and Demanding Applications

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