Mild Steel Seamless Square Pipe

Mild steel seamless square pipe manufacturer in India
ISO Certified Manufacturer

Mild Steel Seamless Pipe

Mild steel seamless pipe is a seamless steel pipe manufactured from low-carbon steel and produced without a longitudinal welded seam. It is commonly used in industrial, engineering, construction, water, process, and general piping applications where the selected material grade and pipe specification meet the service requirements.

Mild steel is generally characterized by relatively low carbon content compared with higher-carbon steels, which can contribute to good weldability and fabrication characteristics. Seamless construction is achieved through processes such as billet piercing and subsequent rolling or sizing.

The correct mild steel seamless pipe should be selected based on pipe dimensions, material grade, pressure, temperature, application, corrosion environment, applicable standards, testing requirements, and installation conditions.

Spark Steel can support project-specific requirements for mild steel and carbon steel pipe products, subject to technical and commercial confirmation.

20+
Years of Experience
50+
Grades in Stock
1/8"–2–4"
Size Range
100%
Quality Tested

MS square pipe specification

MS square pipe specification

SPECIFICATIONDETAILS
MS square pipe length6 meters, 12 meters
Wall thickness1.2 mm to 6.0 mm
Sizes20×20, 30×30, 40×40, 25×25, 50×50, 75×75, 60×60, 100×100
Yield strength235 MPa
Tensile strength360–510 MPa
Temperatureup to about 60°C
Manufacturing processHot Rolled, Cold Rolled
CoatingGalvanized, Paint, Powder Coating
StandardsASTM A500, IS 4923, EN 1021
Mild steel seamless square pipe

Mild steel seamless square pipe

MS square pipe

MS square pipe

MS hollow square pipe

MS hollow square pipe

Mild steel square pipe

Mild steel square pipe

MS square seamless pipe

MS square seamless pipe

MS ERW Square Pipes

MS ERW Square Pipes

Mild steel square pipe weight chart

Mild steel square pipe weight chart

Size Thickness in milimeter Weight (Approx)
15*15 1.2 0
15*15 1.4 0
15*15 1.6 0
15*15 1.8 0
20*20 1.2 4.4
20*20 1.4 0
20*20 1.6 5.6
20*20 1.8 0
20*20 2.0 7
25*25 1.2 5.55
25*25 1.4 0
25*25 1.6 7.2
25*25 2.0 8.16
25*25 2.6 10.14
25*25 3.2 11.88
32*32 1.2 0
32*32 1.4 0
32*32 1.6 9.6
32*32 2.0 10.8
32*32 2.6 13.56
32*32 3.2 16.14
38*38 1.2 8.6
38*38 1.4 0
38*38 1.6 11.6
38*38 2.0 14
38*38 2.6 16.5
38*38 3.2 19.74
38*38 4.0 23.7
40*40 1.2 0
40*40 1.4 0
40*40 1.6 0
40*40 2.6 17.52
40*40 2.9 19.26
40*40 3.2 20.94
40*40 4.0 25.2
50*50 1.2 11.25
50*50 1.4 0
50*50 1.6 15
50*50 2.0 19
50*50 2.6 22.14
50*50 2.9 24.42
50*50 3.6 29.58
50*50 4.5 35.7
60*60 1.2 0
60*60 1.4 0
60*60 1.6 18
60*60 2.0 23
60*60 2.6 27.3
60*60 2.9 30.18
60*60 3.2 33
60*60 4.0 40.26
60*60 4.8 47.1
72*72 1.6 21
72*72 2.0 25
72*72 2.6 34
72*72 3.2 40.26
72*72 4.0 49.32
72*72 4.8 57.96
80*80 1.6 0
80*80 2.0 30
80*80 2.6 38
80*80 3.2 45.06
80*80 4.0 55.32
80*80 4.8 65.22
91.5*91.5 3.0 50
91.5*91.5 3.6 58.02
91.5*91.5 4.5 71.28
91.5*91.5 5.4 84.06
100*100 2.0 0
100*100 3.0 55
100*100 4.0 70.38
100*100 5.0 86.46
100*100 6.0 101.88
113.5*113.5 4.8 95.52
113.5*113.5 5.4 106.44
132*132 1.6 0
132*132 2 0
132*132 4.8 100.26
132*132 5.4 125.28
150*150 4.0 108.06
150*150 5.0 133.56
150*150 6.0 158.4
150*150 7.0 182.64
150*150 8.0 266.28
180*180 4.0 130.68
180*180 5.0 161.82
180*180 6.0 192.3
180*180 7.0 198.18
180*180 8.0 251.46
220*220 4.0 159.66
220*220 5.0 199.5
220*220 6.0 237.54
220*220 7.0 274.98
220*220 8.0 311.76
250*250 4.0 183.42
250*250 5.0 227.76
250*250 6.0 271.44
250*250 7.0 314.52
250*250 8.0 357

MS steel square pipe sizes

MS steel square pipe sizes

Size (mm) Thickness (mm)
mm inch 1.20 1.40 1.60 1.80 2.00 2.30 2.60 2.90 3.20 3.60 4.00 4.30 4.50 4.80 5.00 5.40
72x72 2¾x2¾ 16.06 18.70 21.32 23.93 26.53 30.41 34.26 38.08 41.88 46.90 51.88 55.58 58.03 61.69 64.11 68.92
80x80 3x3 17.90 20.84 23.77 26.69 29.59 33.93 38.24 42.52 46.78 52.42 58.00 62.16 64.92 69.04 71.76 77.19
91x91 3½x3½ 20.49 23.86 27.23 30.58 33.91 38.90 43.86 48.79 53.69 60.19 66.65 71.45 74.64 79.41 82.57 88.85
100x100 4x4 22.41 26.10 29.78 33.45 37.11 42.58 48.01 53.42 58.81 65.95 73.04 78.32 81.83 87.08 90.56 97.48
113x113 4½x4½ 25.46 29.66 33.86 38.03 42.20 48.43 54.63 60.80 66.95 75.11 83.22 89.27 93.29 99.29 103.28 111.23
19x19 ¾x¾ 4.08 4.72 5.35 5.97 6.57 7.45 8.31 9.14 9.94 10.97 11.96 12.66 13.12 13.78 14.21 15.02
25x25 1x1 5.45 6.32 7.17 8.02 8.85 10.07 11.27 12.44 13.59 15.08 16.51 17.56 18.24 19.25 19.90 21.17
30x30 1¼x1¼ 6.58 7.63 8.68 9.71 10.73 12.23 13.72 15.17 16.60 18.46 20.27 21.60 22.47 23.76 24.60 26.25
32x32 1¼x1¼ 7.03 8.16 9.28 10.39 11.48 13.10 14.70 16.26 17.80 19.82 21.78 23.22 24.17 25.57 26.49 28.29
38x38 1½x1½ 8.38 9.74 11.08 12.41 13.73 15.69 17.62 19.52 21.40 23.86 26.28 28.06 29.23 30.97 32.11 34.36
50x50 2x2 11.10 12.91 14.70 16.49 18.26 20.90 23.51 26.09 28.65 32.01 35.33 37.79 39.42 41.83 43.43 46.58
60x60 2¼x2¼ 13.35 15.54 17.71 19.87 22.02 25.22 28.39 31.54 34.66 38.78 42.85 45.87 47.88 50.85 52.82 56.73
132x132 5x5 29.65 34.55 39.44 44.32 49.18 56.46 63.71 70.93 78.13 87.68 97.19 104.28 109.00 116.06 120.74 130.08
150x150 6x6 33.72 39.30 44.86 50.42 55.96 64.25 72.52 80.76 88.97 99.88 110.74 118.85 124.25 132.32 137.69 148.38
180x180 7x7 40.50 47.21 53.91 60.59 67.27 77.25 87.22 97.15 107.06 120.23 133.35 143.16 149.69 159.45 165.95 178.90

Mild steel square pipe price list

Mild steel square pipe price list

Description Price in USD Price in Kilogram (INR)
2.5x2.5 inches MS Square Pipe $ 0.70 ₹ 60
Black MS Seamless Square Pipes, Thickness: 2.77 To 50.8 $ 0.76 ₹ 65
Ms Square Pipe 72 x 72 x 3.2 MM $ 0.63 ₹ 54
MS Square Pipe, 2x2 Inch $ 689.18 ₹ 59,000/Ton

Features of mild steel square pipe

  • High levels of formability
  • Excellent weldability
  • Accurate drift expansion
  • Excellent bending strength
  • Dimensional consistency
  • High tensile strength
  • Enable lighter structures

MS square pipe tolerance chart

MS square pipe tolerance chart

OD Thickness Weight Corner Radius Squareness Length
±1% (±0.5mm min.) ±10% +10%,-8% 3t max. 90° ± 2° 6m to 11m

Manufacturing process of mild steel seamless square pipe

Manufacturing process of mild steel seamless square pipe

MS square pipe dimensions chart

MS square pipe dimensions chart

Size (mm × mm) Wall Thickness (mm) Weight (kg/m)
40 × 40 2.5 3.50
50 × 50 3.0 5.40
60 × 60 3.2 6.90
75 × 75 4.0 10.90
20 × 20 1.6 0.94
25 × 25 1.6 1.20
30 × 30 2.0 1.80
100 × 100 5.0 17.20

Thickness chart of mild steel square hollow section

Thickness chart of mild steel square hollow section

Size millimeter 25 x 25 40 x 40 120 x 120 160 X 160 60 x 60 75 x 75 90 X 90 200 x 200 300×300 400×400
1.5 Kilogram/meter 1.11 1.81
2 1.43 2.37 3.63
2.5 1.74 2.92
3 2.04 3.45 5.34 6.75 8.16
4 4.46 14.5 6.97 10.7
5 5.47 18 8.54 13.3 31.18
6 21.3 28.9 10.3 15.7 37.09 55.3
6.3 75.8
8 27.9 37.6 12.5 20.1 48 74.18 97.8
10 33.7 46.3 15.63 25.1 59.3 90.7 122
12.5 40.9 56.6 30.3 73 112 151
16 72 90.3 142 191
25 293

MS square pipe weight calculator

MS square pipe weight calculator

Mild steel seamless square pipe mechanical properties

Mild steel seamless square pipe mechanical properties

Grade YST min %Elongation (min) UTS min
MPa >25.4 mm <=25.4 mm MPa
Yst 240 240 15 10 410
Yst 310 310 10 8 450
Yst 210 210 20 12 330

Hsn code of MS hollow square pipe

  • 73066100

MS shs pipe advantages

  • Versatile applications
  • Easy to weld and fabricate
  • Uniform shape and size
  • Cost-effective
  • Strong and durable

Mid steel square tube weight chart

Mid steel square tube weight chart

Sizes mm kg/m
40 x 40 x 2.0 2.31
40 x 40 x 2.5 2.92
40 x 40 x 3.0 3.45
40 x 40 x 4.0 4.46
40 x 40 x 5.0 5.40
50 x 50 x 1.5 2.28
50 x 50 x 2.0 2.93
50 x 50 x 2.5 3.71
50 x 50 x 3.0 4.39
50 x 50 x 4.0 5.72
50 x 50 x 5.0 6.97
60 x 60 x 3.0 5.34
60 x 60 x 4.0 6.97
20 x 20 x 2.0 1.12
20 x 20 x 2.5 1.35
25 x 25 x 1.5 1.06
25 x 25 x 2.0 1.43
25 X 25 X 2.5 1.74
25 X 25 X 3.0 2.04
30 X 30 X 2.0 1.68
30 X 30 X 2.5 2.14
30 X 30 X 3.0 2.51
40 x 40 x 1.5 1.81
60 x 60 x 5.0 8.54
60 x 60 x 6.0 9.45
70 x 70 x 3.0 6.28
70 x 70 x 3.6 7.46
70 x 70 x 5.0 10.11
70 x 70 x 6.3 12.50
70 x 70 x 8 15.30

Application of MS square hollow pipe

Application of MS square hollow pipe

Automotive Agriculture Furniture Production
Food Processing Marine & Shipbuilding Energy & Power Plants

Square MS pipe surface coating

  • PE/PVC/PP coated
  • Epoxy coating
  • Color coated
  • Black painted
  • Anti rust oiled
  • Anti rust varnished
  • Galvanized

Heat treatment of square MS black pipe

Heat treatment of square MS black pipe

Stress Relieving 677-927°C
Normalizing 899-954°C
Hardening 788-816°C
Carburizing 899-927°C
Annealing 843-871°C

MS square pipe standard

  • BS 5950
  • ASTM A500
  • IS 4923
  • EN 10219
  • JIS G3466

What Is Mild Steel Seamless Pipe?

A mild steel seamless pipe is a hollow cylindrical steel product manufactured without a longitudinal welded joint and generally made from low-carbon steel.

The term mild steel is commonly used in industry for relatively low-carbon steels. However, the exact chemical composition and mechanical properties depend on the applicable pipe specification and grade.

Main characteristics include:

  • Seamless construction
  • Relatively low-carbon steel composition
  • Good fabrication characteristics
  • Good weldability for suitable grades
  • Availability in different dimensions
  • Suitable for many general industrial applications
  • Availability according to various pipe specifications

The terms mild steel and carbon steel can overlap in commercial usage, but the exact grade and specification should always be confirmed for procurement.

How Is Mild Steel Seamless Pipe Manufactured?

A typical seamless pipe manufacturing process can include:

Steel Billet → Heating → Piercing → Rolling → Sizing → Heat Treatment → Straightening → Inspection → Testing → Marking → Packing

  1. Steel Billet Selection
    A suitable steel billet is selected according to the required material specification and grade.
  2. Billet Heating
    The billet is heated to the temperature required for the selected hot-working process.
  3. Piercing
    The heated billet is pierced to create a hollow cylindrical shell.
  4. Rolling and Elongation
    The hollow shell is processed through rolling or elongation operations to achieve the required dimensions.
  5. Sizing
    The pipe is sized to achieve the required outside diameter and wall thickness.
  6. Heat Treatment
    Heat treatment may be performed when required by the applicable product specification.
  7. Straightening
    The pipe is straightened to meet the required dimensional and straightness tolerances.
  8. Inspection and Testing
    The finished pipe undergoes applicable inspections and tests according to the product specification and purchase requirements.
  9. Marking
    Pipe identification, grade, specification, size, heat number, or other traceability information may be marked as required.
  10. Packing
    Finished pipes are bundled and packed according to transportation and customer requirements.

Key Features of Mild Steel Seamless Pipe

Seamless Construction
Mild steel seamless pipe is manufactured without a longitudinal weld seam.

Good Fabrication Characteristics
Suitable low-carbon steel grades can offer useful weldability and fabrication characteristics.

Strength
The strength of the pipe depends on the selected material grade and applicable specification.

Dimensional Availability
Seamless pipes can be supplied in different outside diameters, wall thicknesses, schedules, and lengths according to the applicable specification.

Versatile Industrial Use
Mild steel seamless pipes can be considered for a broad range of industrial and engineering applications.

Specification-Based Performance
Pressure, temperature, mechanical properties, and testing requirements depend on the specific grade and product specification.

Mild Steel Seamless Pipe Specifications

The exact specification should be established according to the application and project requirements.

Parameter Description
ProductMild Steel Seamless Pipe
ManufacturingSeamless
MaterialMild / Low-Carbon Steel
Pipe ShapeRound
Outside DiameterSpecification dependent
Wall ThicknessSpecification dependent
ScheduleWhere applicable
LengthFixed or random, as specified
GradeApplication dependent
Heat TreatmentAs required by specification
End TypePlain, beveled, or specified
SurfaceMill or specified finish
TestingSpecification dependent
InspectionProject dependent
CertificationMTC and other documents as required

Mild Steel vs Carbon Steel

"Mild steel" is commonly used as a commercial term for relatively low-carbon steel, while carbon steel is a broader material category.

Therefore, a mild steel pipe can fall within the broader carbon-steel family, but not every carbon steel grade should automatically be described as mild steel.

Feature Mild Steel Carbon Steel
MeaningCommon term for relatively low-carbon steelBroader steel classification
Carbon ContentGenerally relatively lowVaries by grade
WeldabilityGenerally good for suitable gradesGrade dependent
StrengthGrade dependentWide range
ApplicationsGeneral engineering, construction and industrial usesGeneral to demanding industrial applications
SpecificationMust be confirmedMust be confirmed

For procurement, always specify the exact grade and standard rather than relying only on the term "mild steel."

Mild Steel Seamless Pipe vs Welded Pipe

Feature Mild Steel Seamless Pipe Mild Steel Welded Pipe
ManufacturingProduced without a longitudinal weldProduced by forming and welding steel
Longitudinal WeldNoYes
Dimensional RangeDepends on manufacturing routeBroad range depending on welding process
Typical SelectionWhen seamless construction is specifiedGeneral and large-diameter applications
CostCan be higher depending on specificationCan be economical depending on size and specification
SelectionApplication and specification dependentApplication and specification dependent

The appropriate pipe construction should be determined by the applicable standard and project requirements.

Mild Steel Seamless Pipe vs Stainless Steel Seamless Pipe

Feature Mild Steel Seamless Pipe Stainless Steel Seamless Pipe
MaterialLow-carbon steelCorrosion-resistant alloy steel
Corrosion ResistanceGenerally lowerGenerally higher
CostOften economicalGenerally higher
FabricationGenerally good for suitable gradesGrade dependent
ApplicationsGeneral industrial, construction and utility applicationsChemical, food, pharmaceutical, marine and corrosive environments
SelectionGrade and environment dependentGrade and corrosion environment dependent

Mild steel may be suitable where corrosion conditions are manageable or additional corrosion protection is provided.

Chemical Composition of Mild Steel Seamless Pipe

Mild steel generally contains iron as the primary element with relatively low carbon content and controlled amounts of other elements.

Depending on the specification, the material can contain:

  • Carbon
  • Manganese
  • Silicon
  • Phosphorus
  • Sulfur
  • Other specified elements

Exact chemical limits vary by grade and standard.

For procurement, the chemical composition should be verified against the applicable product specification and Mill Test Certificate (MTC).

Applications of Mild Steel Seamless Pipe

Mild steel seamless pipe can be used in a range of engineering and industrial applications.

Industrial Piping

  • Process piping
  • Utility lines
  • General fluid transportation
  • Equipment connections

Construction

  • Structural applications
  • Mechanical systems
  • Fabrication projects

Water Systems

  • Water transportation
  • Utility piping
  • Infrastructure projects

Engineering

  • Machinery
  • Fabricated equipment
  • Industrial systems

Oil & Gas
Certain mild/carbon steel seamless pipe grades can be used in oil and gas-related applications where the specified material and pipe standard meet the project requirements.

Power and Process Industries
Suitable grades can be considered for selected process and utility applications depending on pressure and temperature requirements.

Quality Control for Mild Steel Seamless Pipe

Quality control should be aligned with the applicable product standard and project specification.

Chemical Analysis
Chemical composition can be checked against the specified grade.

Mechanical Testing
Depending on the specification, testing may include:

  • Tensile testing
  • Yield strength
  • Elongation
  • Hardness
  • Impact testing where applicable

Dimensional Inspection
Important measurements include:

  • Outside diameter
  • Wall thickness
  • Length
  • Straightness
  • End dimensions

Visual Inspection
Pipe surfaces and ends can be inspected for unacceptable defects or damage.

Pressure Testing
Hydrostatic or other specified pressure testing may be required depending on the product standard.

Non-Destructive Testing
NDT may be specified depending on the pipe standard, grade, application, and purchase requirements.

Material Traceability
Heat numbers and product identification should be maintained according to the applicable quality system.

Mill Test Certificate
MTC documentation can provide relevant information regarding material chemistry, mechanical testing, heat number, specification, and other required inspection data.

How to Select Mild Steel Seamless Pipe

  1. Identify the Application
    Determine whether the pipe is intended for water, process, structural, utility, pressure, or another application.
  2. Select the Grade
    Choose a grade based on pressure, temperature, mechanical requirements, and service conditions.
  3. Confirm the Standard
    Specify the applicable ASTM, ASME, API, or project standard.
  4. Confirm Dimensions
    Provide:
    • NPS
    • Outside diameter
    • Wall thickness
    • Schedule
    • Length
  5. Evaluate Corrosion Conditions
    Mild steel may require additional corrosion-control measures depending on the environment.
  6. Confirm Testing
    Establish whether hydrostatic testing, NDT, impact testing, dimensional inspection, or other tests are required.
  7. Confirm Documentation
    Determine whether the project requires MTCs, inspection reports, third-party inspection, test certificates, or other documentation.

Why Choose Spark Steel?

Spark Steel operates in the steel products and industrial piping sector and can support project-specific requirements for carbon steel, mild steel, stainless steel, and alloy steel products.

The company states that it has 35+ years of industry experience, has supported 500+ projects, and maintains ISO 9001 and ISO 14001 certification.

For mild steel seamless pipe requirements, customers can submit their complete technical specification for evaluation.

Spark Steel can support requirements involving:

  • Mild steel pipes
  • Carbon steel pipes
  • Seamless steel pipes
  • Stainless steel pipes
  • Alloy steel pipes
  • Pipeline products
  • Industrial piping
  • Project-specific inspection requirements
  • Material documentation

Actual grade, specification, dimensions, testing, certification, quantity, and delivery requirements should be confirmed for each order.

Frequently Asked Questions About Mild Steel Seamless Pipe

A mild steel seamless pipe is a seamless pipe generally manufactured from relatively low-carbon steel and produced without a longitudinal welded joint.

It can be used for industrial piping, water systems, construction, engineering, utility lines, and other applications where the selected grade and specification are suitable.

Mild steel is generally considered a relatively low-carbon category within the broader carbon steel family, although terminology can vary commercially.

Mild steel is primarily a low-carbon steel, while stainless steel contains sufficient chromium and other alloying elements to provide enhanced corrosion resistance.

It is generally manufactured from a heated steel billet that is pierced to form a hollow shell and subsequently rolled, sized, heat treated where required, inspected, and tested.

The appropriate grades depend on the applicable specification. Carbon steel grades covered by specifications such as ASTM A106, ASTM A53, or ASTM A333 may be relevant to particular applications.

The terms can overlap because mild steel is generally a low-carbon category within carbon steels. The exact distinction should be based on the material grade and applicable specification.

Mild steel generally has limited inherent corrosion resistance compared with stainless steel. Coating, corrosion allowance, lining, material selection, and environmental controls may be required depending on the application.

Ready to place an order?

We supply premium quality steel products for every industrial application. Call us or send an enquiry and our team will respond within 24 hours.

Send Enquiry Call Now

WhatsApp Chat