ASTM A106 Grade B Pipe

ASTM A106 Grade B is a mild steel pipe material usually used in industrial plants, power plants, power plants, refineries, and chemical plants. ASTM A106 GR. B Carbon Steel Seamless pipes must be solution annealed according to the heat treatment part to restore the ferrite.

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The ASTM A106 pipe of Grade B is a seamless carbon steel specification that works in high temperature services. ASTM A106 Grade B pipe is designed with a chemical composition of chromium, nickel, molybdenum, and other constituting alloys. The A106 pipe has excellent corrosion resistance properties and works well across different oxidative environments.

The ASTM A106 Gr.B Material is designed having excellent mechanical properties. This material has a minimum tensile strength of 60,000psi with a minimum yield strength of 35,000psi. The A106 Gr B pipe of this specification is well suited for bending, flanging, and different forging operation. The A106 pipe suppliers can supply the pipes in seamless, welded, and erw specifications.

An A106 gr.b grade pipe is designed in sizes of NPS 1/8 to NPS 48. The pipe is designed in schedules of SCH 20 through XXH. The SA 106 Gr B works well in higher temperatures and can be either hot or cold rolled. The pipes have plain, bevelled, and threaded ends.

ASTM A106 Grade B is a mild steel pipe material usually used in industrial plants, power plants, power plants, refineries, and chemical plants. ASTM A106 GR. B Carbon Steel Seamless pipes must be solution annealed according to the heat treatment part to restore the ferrite.

A106 pipe has three grades: Grade A and Grade B and C, where in most circumstances used for Grade B.

ASTM A106 pipe (also covered in ASME specifications as S/A 106) is the standard specification for seamless carbon steel pipe for high-temperature service. Most common uses are in refineries and plants when gasses or fluids are transported at high temperatures and pressures.

Chemical composition (%) of ASTM A106

ASTM A106 GradeA0.250.27-0.930.0350.0350.
ASTM A106 GradeB0.30.29-1.060.0350.0350.
ASTM A106 GradeC0.350.29-1.060.0350.0350.
For each reduction of 0.01% for maximum carbon element, an increase of 0.06% manganese above the specified value shall be permitted, and up to maximum of 1.35%. Elements Cr, Cu, Mo, Ni, V combined shall not exceed 1%.

Mechanical properties of ASTM A106

GradeRm Mpa Tensile StrengthYield Point (Mpa)ElongationDelivery Condition
ASTM A106 GradeA≥330≥20520Annealed
ASTM A106 GradeB≥415≥24020Annealed
ASTM A106 GradeC≥485≥27520Annealed
JIS G3456STPT370CASTM A106GrAC3602HFS360C17175St35.8CA49-211TU37bC2604-02-01 00:00:00TS5CC004
(STPT38)"CFS360C17177St37.8CA49-213TU37cC2604-03-01 00:00:00TW9HC
STPT410CASTM A106GrBC3602HFS410C17175St45.8CA49-211TU42bC2604-02-01 00:00:00TS9HC
STPT480CASTM A106GrCC3602HFS460CA49-211TU48bC2604-02-01 00:00:00TS14C

Lengths required shall be specified on order. No “jointers” permitted unless otherwise specified. If no definite lengths required, following practice applies: Single Random — 17′ ~ 24′ lengths Double Random — 36′ ~ 44′ lengths

Required Markings on Each Length
(On Tags attached to each Bundle in case of Bundled Pipe) Rolled, Stamped, or Stenciled (Mfrs. Option) Manufacturer’s name or brand. Length of pipe. A106 A, A 106 B, A 106 C. ANSI schedule number. Hydrostatic test pressures and/or NDE; Weight per foot (NPS 4 and larger) or NH if neither is specified. Additional “S” if tested supplementary requirements.

Referenced Documents

  • ASTM A 530/A 530M Specification for General Requirements for Specialized Carbon and Alloy Steel Pipe
  • ASTM E 213 Practice for Ultrasonic Examination of Metal Pipe and Tubing
  • ASTM E 309 Practice for Eddy-Current Examination of Steel Tubular Products Using Magnetic Saturation
  • ASTM E 381 Method of Macroetch testing Steel Bars, Billets, Blooms, and Forgings
  • ASTM E 570 Practice for Flux Leakage Examination of Ferromagnetic Steel Tubular Products
  • ASME B36.10M Welded and Seamless Wrought Steel Pipe

What is the difference between A106 Gr B Pipe lining and coating?

Lining and coating on the A106 Steel pipe is done to protect the surface of the pipe against corrosion and different affluents. The coated A106b pipe helps in coating the outer surface of the material. They prevent contaminants from entering the piping structures. A lined SA 106 gr b pipe covers the interior surface of a pipe or other structures. The lining is performed in structures that transport volatile liquids and gases.

What is A106 galvanized pipe?

The A106 galvanized pipe is dipped into a protective zinc coating to prevent the formation of corrosion and rust. The galvanized A106 carbon steel pipe offers complete protection and is easy to clean and inspect.

Weight Chart of A106 Carbon Steel Pipe

ize Other Diameter WT Pipe I.D. Gallon Standard to XXHY Section Modulus Weight Schedule
Pipe #
3/4 1.05 0.113 0.824 .0277 STD .0705 1.13 40
0.219 0.612 .0153 .1006 1.95 160
0.154 0.742 .0225 XHY .0853 1.48 80
1/2 0.84 0.109 0.622 .0158 STD .0407 0.85 40
0.188 0.464 .0088 .0528 1.31 160
0.147 0.546 .0122 XHY .0478 1.09 80
1 1/4 1.66 0.140 1.380 .0777 STD .2346 2.27 40
0.250 1.160 .0549 .3421 3.77 160
0.191 1.278 .0666 XHY .2913 3.00 80
1 1.315 0.133 1.049 .0449 STD .1328 1.68 40
0.250 0.815 .0271 .1904 2.85 160
0.179 0.957 .0374 XHY .1606 2.17 80
2 2.375 0.109 2.157 .1898 .4205 2.64 10
0.154 2.067 .1743 STD .5606 3.66 40
0.344 1.687 .1161 .9806 7.47 160
0.281 1.813 .1344 .8666 6.29
0.218 1.939 .1534 XHY .7309 5.03 80
0.250 1.875 .1434 .8045 5.68
1 1/2 1.90 0.145 1.610 .1058 STD .3262 2.72 40
0.281 1.338 .0730 .5079 4.86 160
0.200 1.500 .0918 XHY .4118 3.63 80
3 3.50 0.120 3.260 .4336 1.0411 4.34
0.156 3.188 .4147 1.3122 5.58
0.188 3.124 .3984 1.5342 6.66
0.438 2.624 .2811 2.8774 14.34 160
0.172 3.156 .4064 1.4265 6.12
0.300 2.900 .3431 XHY 2.2253 10.26 80
0.216 3.068 .3840 STD. 1.7241 7.58 40
0.250 3.000 .3672 1.9372 8.69
0.281 2.938 .3521 2.1207 9.67
2 1/2 2.875 0.120 2.635 .2833 .6870 3.53 10
0.250 2.375 .2301 1.2468 7.02
0.203 2.469 .2487 STD. 1.0640 5.80 40
0.216 2.443 .2435 1.1169 6.14
0.276 2.323 .2202 XHY 1.3386 7.67 80
0.375 2.125 .1842 1.6371 10.02 160
3 1/2 4.0 0.120 3.760 .5768 1.3776 4.98 10
0.318 3.364 .4617 XHY 3.1400 12.52 80
0.226 3.548 .5136 STD. 2.3939 9.12 140
0.250 3.500 .4998 2.6001 10.02
0.281 3.438 .4821 2.8562 11.17

What is the difference between ASTM A53 and ASTM A106?

A53 pipe is best suited for transport of air, water, steam and oil in low- and medium pressure applications across the industrial spectrum. It’s also commonly used as structural steel. A106 pipe is formulated specifically for high-temperature and high-pressure service, usually in power generation applications.


The production of our seamless pipes is tightly regulated and all of the pipes we stock have been fully tested to international standards to ensure we only supply the highest quality products.


American Society for Testing and Materials(ASTM), American Society of Mechanical Engineers (ASME)
Product nameExecutive standardDimension (mm)Steel code/ Steel grade
Black and Hot-dipped Zinc-coated Steel Pipes SeamlessASTM A530.3-1200 x 1.0-150GR.A, GR.B, GR.C
Seamless Carbon Steel for High Temperature ServiceASTM A10610.3-1200 x 1.0-150GR.B, GR.C
Seamless Cold-drawn Low-Carbon Steel Heat-Exchanger and Condenser TubesASTM A17910.3-426 x 1.0-36Low Carbon Steel
Seamless Carbon Steel Boiler Tubes for High PressureASTM A19210.3-426 x 1.0-36Low Carbon Steel
Seamless Cold-drawn Intermediate Alloy Steel Heat-exchanger and Condenser TubesASTM A19910.3-426 x 1.0-36T5, T22
Seamless Medium-carbon Steel Boiler and Superheater TubesASTM A21010.3-426 x 1.0-36A1, C
Seamless Ferritic and Austenitic Alloy Steel Boiler, Superheater and Heat-exchanger TubesASTM A21310.3-426 x 1.0-36T5, T5b, T9 , T11, T22 ,T91
Seamless Carbon and Alloy Steel for Mechanical TubingASTM A3331/4"-42" x SCH20-XXSGrade1 Gr. 3,Gr..6, Gr.8 , Gr. 9
Seamless Cold-drawn Carbon Steel Feedwater Heater TubesASTM A55610.3-426 x 1.0-36A2, B2
Round and shaped steel cold formed welded and seamless carbon steel structural pipe.ASTM A500OD :10.3-820 x 0.8- 75Grade A, B, C, D
Carbon and alloy steel mechanical tubing, either hot-finished or cold-finishedASTM A51910.3-426 x 1.0-361020, 1025, 4130, 4140
For seamless ferritic alloy-steel pipe for high-temperature serviceASTM A3351/4"-42" x SCH20-XXSA/SA 335 P1, P2, P11, P12, P15, P22, P91, P92, P122



Cold drawn seamless steel tube deformed process

Cold Drawn Seamless Mechanical Tubing (CDS) is a cold drawn 1018/1026 steel tube which offers uniform tolerances, enhanced machinability and increased strength and tolerances compared to hot-rolled products.

Cold drawn seamless steel tubes process

Cold drawn steel tube is with hot-rolled steel coil as raw material, and tandem cold rolling pickled to remove oxide scale, its finished rolling hard roll, rolling hard volumes due to the continuous cold deformation caused by cold hardening strength, hardness increased indicators declined tough plastic, stamping performance will deteriorate, which can only be used for simple deformation of the parts.

Rolling hard roll can be used as the raw material of the hot-dip galvanizing plant, hot dip galvanizing line set annealing line. Rolling hard roll weight is generally 6 to 13.5 tons, the coil diameter of 610mm.

Hot rolled seamless steel pipe deformed process

Hot-rolled seamless steel pipe production base deformation process can be summarized as three stages: perforation, extension and finishing.

Hot rolled seamless steel pipe deformed process

The main purpose of the perforation process is to become a solid round billet piercing hollow shell. Capillary in the specifications, accuracy and surface quality can not meet the requirements of the finished product, further improvements are needed to deform the metal through. The main purpose of the stretching machine is further reduced sectional view (main compression wall) for a larger axial extension, so that the capillary improved dimensional accuracy, surface quality and organizational performance.

After stretching machine rolled steel pipe shortage collectively need further molding mill in order to achieve the requirements of the finished pipe. Rolled steel due to pass in the method widely used in the production of seamless steel tubes.

So far, due to the method pass rolling steel can be divided into two categories: core pension without rolling rolling (hollow body rolling), and with the mandrel. Sizing machines, reducing mill and stretch reducing mill belonging to the hole without mandrel type continuous rolling mills are generally coffin. Its main purpose is to reduce the diameter of the deformation process or sizing get finished steel, the wall thickness of process control, can make thinning, thickening or nearly unchanged.

All the traditional hole-type rolling machine with mandrel belong to extend machine. The main purpose is to reduce the deformation process perforated capillary wall thickness and outer diameter roll passes in the deformation zone and the mandrel posed, for a larger axial extension. At the same time a certain improvement in the organization, performance, accuracy, surface quality.

Cut to LengthASTM A210 seamless medium carbon steel boiler and superheater tubes

Before cutting pipe and tubing

No matter the material, measure the diameter of the pipe or tube to be cut to ensure that you use the right-size tube cutter for the job. When determining how to make a straight cut, use a tape measure and a pencil or other writing instrument to mark on the surface where you want to cut. If possible, mark around the circumference of a pipe, especially when cutting with a handsaw. Ensure that a cut is as straight as possible by securing the pipe with a vise, clamp, miter box or even duct tape to keep the length from shifting out of place while cutting.

After cutting pipe and tubing

  • Unless a cut is perfectly clean, you should expect to remove burrs from around the edge, especially after sawing.
  • Use a deburring tool to clean the edge after tube cutting.
  • You may opt to use a metal file on the cut of a metal pipe.


Size inspection

Geometrical inspection of steel pipes The outer diameter, wall thickness, bending and length of the steel pipe can be inspected on the inspection table with an outer caliper, a micrometer and a bending ruler, and a length tape measure.

Tolerances of pipes you should notice

Take seamless steel pipe as an example, there are some tolerances that affect quality. Noting this, and you will get a better pipe.

Weight tolerance
For pipe NPS 12 (DN300, 323.8mm) and under, the weight shall vary within -3.5% / +10%.

For pipe over NPS 12 (DN300, 323.8mm), the weight shall vary within -5% / +10%.

Pipe of NPS 4 (DN100, 114.3mm) and smaller may be weighed in convenient lots; pipe in sizes larger than NPS 4 shall be weighed separately.

Quantity tolerance
Normally mills take -10% to +10% tolerance, but TPMCSTEEL keeps ±3% variation.

Length tolerance
For Seamless pipe& tube, if definite cut lengths are ordered, the length shall vary within -0mm / +6mm.

Dimension tolerances of seamless steel pipe

Pipe typesPipe Szie(mm)Tolerances
Hot rolledOD<50±0.50mm
≥4-20+15%, -12.5%
Cold drawnOD6-10±0.20mm
>1-3+ 15%, – 10%
>3+ 12.5%, – 10%
StandardHot finished seamless tubeCold flnished seamless tube
Out diameter
ToleranceOut diameter
EN10216-1≤100 +/-0.75%
All +/-0.5%
EN10216-2(min. +/-0.30mm)
DIN17175>100 +/-0.90%
GB/T 3087≤460 +/-0.75%
 10-30  +/-0.40mm
>30-50 +/-0.45mm
>50 +/-1.0%
GB/T 5310
GB/T 9948
GB/T 6479
<57 +/-0.40mm≤30 +/-0.20mm 
 57-325  +/-0.75%>30-50  +/-0.30mm 
>325-460 +1%,-2mm>50 +/-0.8% 
JIS G 3461
JIS G 3461
≤101.6 +0.4, -0.8mm<25.4 +/-0.10mm
>25.4-38.1 +/-0.15mm
>38.1-50.8 +/-0.20mm 
101.6-190.5 +0.4, -1.2mm>50.8-63.5 +/-0.25mm
>63.5-76.2 +/-0.30mm 
>76.2 +/-0.38mm
≤48.3 +/-0.40mm ≤48.3 +/-0.40mm
 48.3-114.3 +/-0.79mm 
114.4-219.1 +1.59, -0.79mm 
219.2-323.9 +2.38, -0.79mm>48.3 +/-0.79mm 
>324 +/-1.0%

Tolerances on wall thickness

The wall thickness at any point shall be within the below tolerance table.
StandardHot finished seamless tubeCold flnished seamless tube
DIN17175Out diameter
Wall thickness
ToleranceOut diameter
Wall Thickness
≤130S≤2Sn +15%, -10%   --All +/-10%
(min. +/-0.2mm)
2Sn +12.5%, -10% 
S>4Sn +-/9%
>130S≤0.05da +17.5%, -12.5% 
0.05da +/-12.5% 
S>0.11da +/-10% 
EN 10216-1
EN 10216-2
 ≤219.1  -   +/-12.5%
 -- T/D≤0.025 +/-20% 
0.025 +/-15% 
0.05 +/-12.5% 
0.1 +/-10% 
GB/T 3087 -- ≤20 +15%,-12.5%
(min.+0.45, -0.35mm)
 --  1.0-3.0  +15%, -10% 
>20 +/-12.5%  -- >3 +12.5%, -10% 
GB/T 5310
GB/T 9948
GB/T 6479
 -- <4.0 +15%,-10%
(min.+0.48, -0.32mm)
 --  2-3  +12%,-10% 
 4-20  +12.5%,-10% >3 +/-10% 
>20 +/-10%
JIS G 3461
JIS G 3462
 --  2.41-3.8  +35%, -0% ≤38.1 --  +20%,-0% 
 3.8-4.6  +33%,-0% >38.1 -- 22%,-0% 
>4.6 +28%,-0%  --  --  -- 
 -- All +/12.5% All +/-10% 


  1. The size in the table above is for the hot-rolled tubes.
  2. The size of the green area is the regular specification, we can accept orders directly, but the yellow area shall be subject to a technical evaluation.
  3. The Out side diameter (O.D) and wall thickness (W.T.) of the tube should be complied.

PMI test

Positive material identification (PMI) testing is the examination of a material, usually a metallic alloy, to confirm the material is consistent with the user’s request.


Steel pipe delivery status(condition)

Steel pipe delivery status(condition): cold / hard (BK), cold / soft (BKW), after cold stress relief annealing (BKS), annealing (GBK), normalized (NBK).

Condition on delivery of steel pipe

Cold-finished/hard (cold-finished as-drawn)BKNo heat treatment after the last cold-forming process. The tubes therefore have only low deformability.
Cold-finished/soft (lightly cold-worked)BKWAfter the last heat treatment there is a light finishing pass (cold drawing) With proper subsequent processing, the tube can be cold-formed (e.g. bent, expanded) within certain limits.
AnnealedGBKAfter the final cold-forming process the tubes are annealed in a controlled atmosphere or under vacuum.
NormalizedNBKThe tubes are annealed above the upper transformation point in a controlled atmosphere or under vacuum.
The general cold strip mills, volume should go through continuous annealing (CAPL unit) to eliminate cold hardening and rolling stress, or batch annealing reach the mechanical properties of the corresponding standard specifies. Cold rolled steel surface quality, appearance, dimensional accuracy better than hot-rolled plate, and right-rolled thin product thickness is about 0.18mm, so the majority of users favor.

Cold rolled steel coil substrate products deep processing of high value-added products. Such as electro-galvanized, hot dip galvanized, electro-galvanized fingerprint resistant, painted steel roll damping composite steel, PVC laminating steel plates, etc., so that the excellent quality of these products has a beautiful, high resistance to corrosion, has been widely used.

Cold rolled steel coil finishing after annealing, cut the head, tail, trimming, flattening, smooth, heavy volume, or longitudinal clipboard. Cold-rolled products are widely used in automobile manufacturing, household electrical appliances, instruments, switches, buildings, office furniture and other industries. Steel plate strapping package weight of 3 to 5 tons. Flat sub-volume typically 3 to 10 tons / volume. Coil diameter 6m.


There are probably hundreds of different methods for packing a pipe, and most of them have merit, but there are two principles that are vital for any method to work prevent rusting and Sea transportation security.

  • Plastic caps plugged at the two sides of pipe ends
  • Should be avoided by the steel strapping and transport damage
  • Bundled signs should be uniform and consistent
  • The same bundle(batch) of steel pipe should be came from the same furnace.
  • The steel pipe has the same furnace number, the same steel grade, the same specifications.

Our packing can meet any needs of the customers.


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Q: How long is your delivery time?
A: The delivery time of customized products is generally 25 35 days, and non customized products are generally shipped within 24 hours after payment.

Q: Do you provide samples? Is it free?
A: If the value of the sample is low, we will provide it for free, but the freight needs to be paid by the customer. But for some high value samples, we need to charge a fee.

Q: What are your payment terms?
A: T/T 30% as the deposit,The balance payment is paid in full before shipment

Q: What is the packaging and transportation form?
A: Non steaming wooden box and iron frame packaging. Special packaging is available according to customer needs. The transportation is mainly by sea.

Q: What is your minimum order quantity?
A: There is no minimum order quantity requirement. Customized products are tailor made according to the drawings provided by the customer.