ASTM A105 Round Bar
ASTM A105 Round Bar Manufacturer & Stockist in India
ASTM A105 round bar is a carbon steel forging grade material that is widely used in high pressure piping systems, flanges, valves, and fittings in oil and gas, petrochemical and power generation industries. A105 bar or SA 105 round bar, also known as A105 bar or SA 105 round bar, is a material specified under ASTM A105 / ASME SA105 standards and offers good weldability, machinability and mechanical properties over ambient to high temperature service.
Stellar Alloys Steel Pipes and Tubes is a top manufacturer and ASTM A105 round bar A105 supplier in India with high quality carbon steel A105 round bars that can meet international standards and project requirements. Being a reputed supplier of ASME SA105 round bar, the company guarantees on-time delivery and good performance.
Carbon Steel A105 bars are found in various forms like ASTM A105 hex bar, ASTM A105 square bar, ASTM A105 flat bar, and ASTM A105 rod including bright and black finish options. Heat treatment of these bars can be done using such processes as annealing, normalizing, quenching, and tempering to improve the mechanical properties and performance.
ASTM A105 forged bars have a wide usage in the pressure systems which are subjected to the ambient temperature as well as the high-temperature conditions. They are good machinable, corrosion-resistant and long-lasting, thus suitable in industries like power generation, petrochemical, oil and gas and refineries.
Application ASME SA105 flat bars are regularly used in fabrication applications such as railings, plant equipment, gates, windows and structural elements. There are A105 square and hex bars, in bright, polished and black finish, to suit various industrial needs.
In Stellar Alloys Steel Pipes and Tubes, the standard lengths of the ASTM A105 rods are 1 meter to 6 meters, although custom sizes can be ordered. These bars are characterized by good oxidation resistance, high strength as well as durability. The melting point of the material is around 1425 C.
Table of Contents
- Specification of ASTM A350 LF2 Round Bar
- Types of ASTM A350 LF2 Round Bar
- Chemical Composition of ASTM A350 LF2 Round Bar
- Mechanical Properties of ASTM A350 LF2 Round Bar
- Equivalent Grades of ASTM A350 LF2 Round Bar
- Round Bar Sizes of ASTM A350 LF2 Round Bar
- Round Bar Price List of ASTM A350 LF2 Round Bar
- Weight Chart of ASTM A350 LF2 Round Bar
- Applications & Uses of ASTM A350 LF2 Round Bar
- Qualities of ASTM A350 LF2 Round Bar
- Manufacturing & Heat Treatment of ASTM A350 LF2 Round Bar
- Dimensional Tolerances of ASTM A350 LF2 Round Bar (as per ASTM A484)
- Related Products
- FAQs About ASTM A350 LF2 Round Bars
Astm a105 Round Bar Specifications
Parameter | Details |
Standard | ASTM A105 / ASME SA105 |
Thickness Range (Flat Bar) | 2 mm to 150 mm |
Width Availability | 1/2″ to 10″ |
Surface Finish | Bright, Cold Drawn, Hot Rolled Pickled, Hairline, Polished, Sand Blasted |
Dimensional Standards | ASTM, ASME, AISI, EN, DIN, BS, JIS |
Delivery Condition | Annealed, Hardened, Tempered |
Types of ASTM A105 Round Bar
ASME SA105 Half Round Bar
ASTM A105 Carbon Steel Round Bars, Length_ 3 & 6 meter
ASTM A105 Carbon Steel Threaded Bars
ASTM A105 CS Hexagonal Rod
ASTM A105 Hot Rolled_Cold Drawn Carbon Steel Round Bar
ASTM A105 Precision Ground Bar
ASTM A105 UNS K03504 Bright Bar
ASTM A105 Hot Rolled_Cold Drawn Carbon Steel Round Bar
Carbon Steel Grade A105 T-Bar
Cold Drawn A105 Steel Hollow Bar
CS ASTM A105 Billet
Hydraulic A105 Ground Steel Piston Rod
ASTM A105 Round Bar Size Range (Various Forms)
Product Type | Size Range |
Round Bar | 3 mm to 300 mm diameter |
Hollow Bar | 32 mm OD × 16 mm ID to 250 mm OD × 200 mm ID |
Square Bar | 2 mm to 25.4 mm (AF range) |
Hex Bar | 5.8 mm to 17 mm (AF) |
Section Bar Thickness | 3 mm to 12 mm |
Angle Bar | 20 × 20 × 3 mm to 100 × 100 × 12 mm |
Channel Bar | 80 × 40 mm to 150 × 75 mm (5–6 mm thickness) |
Billet Size | 12 mm to 495 mm diameter |
Rectangular Bar | 6.35 × 12.7 mm to 12.7 × 25.4 mm |
ASTM A105 Round Bar Tolerance & Forms
Parameter | Details |
Tolerance Standards | H8, H9, H10, H11, H12, H13, K9, K10, K11, K12 or custom |
Available Forms | Round, Flat, Square, Hex, Billet, Ingot, Forged, Hollow, Threaded, Profiles, T Bar, Channel, Blocks |
ASTM A105 Bar Weight Calculation
Shape | Formula |
Round Bar | D² × 2.67 |
Square Bar | D² × 3.40 |
Flat Bar | Thickness × Width × 3.40 |
Hex Bar | D² × 2.945 |
ASTM A105 Equivalent Material
Standard | UNS | Werkstoff No. |
ASTM A105 | K03504 | — |
Our stainless steel round bars serve mission-critical applications across multiple industries due to their exceptional strength, corrosion resistance, and reliability in harsh environments:
Common applications include:
- Oil and Gas Industry – Downhole pump shafts, valve stems, instrumentation components, and wellhead equipment
- Chemical Processing Plants – Reactor vessel shafts, agitator components, pump impellers, and corrosion-resistant fasteners
- Marine and Offshore Structures – Propeller shafts, deck equipment, rigging hardware, and saltwater-resistant fittings
- Automotive and Mechanical Engineering – Engine components, transmission shafts, precision machined parts, and suspension elements
- Pump and Valve Manufacturing – Valve stems, pump shafts, piston rods, and high-pressure fittings
- Construction and Structural Frameworks – Architectural supports, railing systems, and load-bearing structural members
- Food Processing Equipment – Mixer shafts, conveyor components, sanitary fittings, and hygienic processing machinery
- Aerospace Components – Landing gear parts, high-strength fasteners, precision machined aircraft components
ASTM A105 Round Bar Chemical Composition
Element
Composition
Carbon (C)
≤ 0.35
Manganese (Mn)
0.60 – 1.05
Phosphorus (P)
≤ 0.035
Sulfur (S)
≤ 0.040
Silicon (Si)
0.10 – 0.35
Copper (Cu)
≤ 0.40
Nickel (Ni)
≤ 0.40
Chromium (Cr)
≤ 0.30
Molybdenum (Mo)
≤ 0.12
Vanadium (V)
≤ 0.08
Niobium (Nb)
≤ 0.02
Tolerance of Carbon Steel A105 Flat Bar
Size Range (mm)
Permissible Variation (mm)
≥ 6 to ≤ 18
+0 / -0.070
> 18 to ≤ 30
+0 / -0.085
> 30 to ≤ 50
+0 / -0.100
> 50 to ≤ 80
+0 / -0.120
> 80 to ≤ 120
+0 / -0.140
> 120 to ≤ 180
+0 / -0.160
> 180 to ≤ 250
+0 / -0.185
> 250 to ≤ 315
+0 / -0.210
> 315 to ≤ 400
+0 / -0.230
> 400
+0 / -0.250
ASTM A105N Forged Bar Testing Methods
Non-Destructive & Destructive Tests
Radiographic Testing (RT)
Eddy Current Testing
Positive Material Identification (PMI)
Chemical Composition Analysis
Pitting Corrosion Testing
Buckling and Crushing Test
Mechanical Testing (Tensile Strength, Elongation, Reduction of Area)
Carbon Steel A105 Rod Tolerances
Round Bar Tolerance
Diameter (mm) | Permissible Variation (mm) |
≥ 6 to ≤ 18 | +0 / -0.070 |
> 18 to ≤ 30 | +0 / -0.085 |
> 30 to ≤ 50 | +0 / -0.100 |
> 50 to ≤ 80 | +0 / -0.120 |
> 80 to ≤ 100 | +0 / -0.140 |
Flat Bar Tolerance (Thickness)
Thickness (mm) | Permissible Variation (mm) |
< 18 | +0 / -0.110 |
> 18 to ≤ 30 | +0 / -0.130 |
> 30 to ≤ 50 | +0 / -0.250 |
> 50 to ≤ 80 | +0 / -0.350 |
Flat Bar Tolerance (Width)
Width (mm) | Permissible Variation (mm) |
< 18 | +0 / -0.110 |
> 18 to ≤ 30 | +0 / -0.130 |
> 30 to ≤ 50 | +0 / -0.160 |
> 50 to ≤ 80 | +0 / -0.190 |
> 80 to ≤ 100 | +0 / -0.220 |
> 100 to ≤ 130 | +0 / -0.350 |
> 130 to ≤ 160 | +0 / -1.00 |
> 160 to ≤ 320 | +1.00 / -1.00 |
Square & Hex Bar Tolerance
Size (mm) | Permissible Variation (mm) |
≥ 6 to ≤ 18 | +0 / -0.090 |
> 18 to ≤ 30 | +0 / -0.110 |
> 30 to ≤ 50 | +0 / -0.130 |
> 50 to ≤ 80 | +0 / -0.160 |
> 80 to ≤ 105 | +0 / -0.250 |
Carbon Steel A105 Hex Bar – Sizes & Schedule
Type | Size (Inches) | Size (mm) | ISO Tolerance |
Peeled & Polished | 1.50 – 6.00 | 40 – 150 mm | h11 (DIN 1013) |
Cold Drawn & Polished | 1/8 – 3.00 | 3 – 75 mm | h8, h9, h10, h11 |
Cold Drawn & Ground | 5/6 – 2.50 | 10 – 75 mm | h8, h9, h10, h11 |
Peeled & Ground | 3/4 – 2.00 | 20 – 50 mm | h9, h10, h11 |
ASTM A105 Carbon Steel Square Bar Tolerance
Cold Drawn Square Bar – ISO “H” Series Tolerances (mm)
Size Range (mm) | h5 | h6 | h7 | h8 | h9 | h10 | h11 | h12 |
Up to 3 | +0.004 / 0 | +0.006 / 0 | +0.010 / 0 | +0.014 / 0 | +0.025 / 0 | +0.040 / 0 | +0.060 / 0 | +0.100 / 0 |
> 3 to 6 | +0.005 / 0 | +0.008 / 0 | +0.012 / 0 | +0.018 / 0 | +0.030 / 0 | +0.048 / 0 | +0.075 / 0 | +0.120 / 0 |
> 6 to 10 | +0.006 / 0 | +0.009 / 0 | +0.015 / 0 | +0.022 / 0 | +0.036 / 0 | +0.058 / 0 | +0.090 / 0 | +0.150 / 0 |
> 10 to 18 | +0.008 / 0 | +0.011 / 0 | +0.018 / 0 | +0.027 / 0 | +0.043 / 0 | +0.070 / 0 | +0.110 / 0 | +0.180 / 0 |
> 18 to 30 | +0.009 / 0 | +0.013 / 0 | +0.021 / 0 | +0.033 / 0 | +0.052 / 0 | +0.084 / 0 | +0.130 / 0 | +0.210 / 0 |
> 30 to 50 | +0.011 / 0 | +0.016 / 0 | +0.025 / 0 | +0.039 / 0 | +0.062 / 0 | +0.100 / 0 | +0.160 / 0 | +0.250 / 0 |
> 50 to 80 | +0.013 / 0 | +0.019 / 0 | +0.030 / 0 | +0.046 / 0 | +0.074 / 0 | +0.120 / 0 | +0.190 / 0 | +0.300 / 0 |
> 80 to 120 | +0.015 / 0 | +0.022 / 0 | +0.035 / 0 | +0.054 / 0 | +0.087 / 0 | +0.140 / 0 | +0.220 / 0 | +0.350 / 0 |
> 120 to 180 | +0.018 / 0 | +0.025 / 0 | +0.040 / 0 | +0.063 / 0 | +0.100 / 0 | +0.160 / 0 | +0.250 / 0 | +0.400 / 0 |
> 180 to 250 | +0.020 / 0 | +0.029 / 0 | +0.046 / 0 | +0.072 / 0 | +0.115 / 0 | +0.185 / 0 | +0.290 / 0 | +0.460 / 0 |
Carbon Steel SA105 Hollow Bar – Mechanical Properties
| Property | Value |
| Tensile Strength (min) | 70,000 psi (485 MPa) |
| Yield Strength (min) | 36,000 psi (250 MPa) |
| Reduction of Area | ≥ 30% |
| Hardness (Max) | 187 HB |
ASTM A105 Steel Bar – Condition Codes
| Code | Description |
| ANN | Annealed |
| H&T | Hardened and Tempered |
| PH | Precipitation Hardened |
Physical Properties of ASTM A105 Hex Rod
| Property | Value |
| Melting Point | 1425°C (2600°F) |
| Density | 0.292 lb/in³ |
| Density | 8.08 g/cm³ |
ASME SA105 Bar – Size & Specification Overview
Parameter | Details |
Standards | ASTM A105, ASME SA105 |
Dimensional Standards | BS, EN, ASTM, ASME, AISI, DIN, JIS |
Round Bar Size | 3 mm to 300 mm diameter |
Rectangular Bar | 6.35 × 12.7 mm to 12.7 × 25.4 mm |
Hex Bar | 2 mm to 25.4 mm (AF range) |
Square Bar | 2 mm to 25.4 mm |
Flat Bar Thickness | 2 mm to 150 mm (1/2″ to 10″) |
Surface Finish | Bright, Polished, Black |
Length | 1 to 6 meters (custom sizes available) |
Forms | Round, Hex, Square, Billet, Ingot, Forged, Rectangle |
ASTM A105 Round Bar Price in India (Indicative)
Product | Price |
Carbon Steel ASTM A105 Hex Bar (1-1/4″ × 10 ft) | $13.99 / meter |
ASTM A105 Bright Round Bars (6m length) | $0.53 / kg |
ASTM A105 Flat Bar (75 × 8 mm × 3m) | $44.25 / kg |
ASTM A105 Rod (Ø 290 mm × 40 length) | $304.37 / piece |
Note: Prices are indicative and may vary based on size, finish, and quantity.
Surface Finish Codes for ASTM A105 Shaft
Code | Description | Code | Description |
CF | Cold Finished | CD | Cold Drawn |
ST | Smooth Turned | CG | Centreless Ground |
P&T | Peeled & Turned | P | Polished |
SRE | Slit Rolled Edge | BD | Bright Drawn |
RT | Rough Turned | PR | Peeled & Reeled |
HRAP | Hot Rolled Annealed & Pickled | HF | Hot Finished |
Processing Methods of ASTM A105 Hot Rolled Bars
Cold Working
Hot Working
Heat Treatment
Heat Resistance Processing
Machining
Fabrication
Welding
Carbon Steel A105 Square Bar – Weight Chart
Size (mm) | Weight (kg/m) | Weight (kg/ft) |
10 × 10 | 0.80 | 0.20 |
12 × 12 | 1.10 | 0.30 |
14 × 14 | 1.50 | 0.50 |
16 × 16 | 2.00 | 0.60 |
20 × 20 | 3.14 | 1.00 |
25 × 25 | 4.90 | 1.50 |
32 × 32 | 8.00 | 2.40 |
40 × 40 | 12.60 | 3.80 |
50 × 50 | 19.60 | 6.00 |
63 × 63 | 31.20 | 9.50 |
ASTM A105 Round Bar – Documentation & Packaging
Material Test Certificates (MTC)
Certificate of Origin
NABL Approved Test Reports
Heat Treatment Records
Quality Assurance Plan (QAP)
Commercial Invoice with HS Code
Carbon Steel A105 Hex Bar – Weight per Meter
Size (mm) | Weight (kg/m) | Size (inch) | Weight (kg/m) |
3 | 0.06 | 1/8″ | 0.06 |
4 | 0.10 | 3/16″ | 0.14 |
5 | 0.16 | 1/4″ | 0.25 |
6 | 0.22 | 5/16″ | 0.39 |
8 | 0.40 | 7/16″ | 0.77 |
10 | 0.62 | 1/2″ | 1.00 |
12 | 0.89 | 9/16″ | 1.22 |
14 | 1.22 | 5/8″ | 1.56 |
16 | 1.59 | 3/4″ | 2.25 |
18 | 2.01 | 7/8″ | 3.07 |
20 | 2.48 | 1″ | 4.03 |
24 | 3.57 | — | — |
25 | 3.88 | — | — |
Heat Treatment of ASTM A105 Round Bar
Explain both conditions clearly:
Normalizing
Heated above critical temperature (~900–950°C)
Air cooled
Results in refined grain structure
Improves toughness and uniform mechanical properties
Preferred for general pressure and piping applications
Annealing
Slow furnace cooling after heating
Reduces hardness and internal stress
Improves machinability
Used when extensive machining is required
ASTM A105 vs ASTM A350 LF2 vs ASTM A106
Property | ASTM A105 | ASTM A350 LF2 | ASTM A106 Grade B |
Material Type | Carbon Steel Forging | Low Temperature Carbon Steel | Seamless Carbon Steel Pipe |
Temperature Range | Ambient to moderate | -46°C low temperature service | High temperature service |
Toughness | Good | Excellent (cryogenic) | Moderate |
Typical Use | Flanges, fittings | Low-temp flanges, pressure parts | Piping systems |
Impact Resistance | Standard | High impact tested | Not impact tested (standard) |
Manufacturing Process of ASTM A105 Round Bar
Manufactured by means of hot forging, of carbon steel billets.
- Forging enhances the structure of the grains and directional strength.
- Followed by controlled cooling or heat treatment
Ensures:
- High tensile strength
- Improved fatigue resistance
- Better impact performance
Why it matters:
- Forging removes internal pores and enhances mechanical integrity than cast materials.
How to Select ASTM A105 Round Bar Size
DN15–DN50 (15-50 mm diameter bars): Small valves, fittings, instrumentation parts.
DN50-DN150 (50-150mm diameter bars): Flanges, medium pressure piping parts.
Over DN150 (>150 mm): Heavy-duty flanges, pressure vessels, structural components.
Also add:
Always take into account pressure rating (Class 1502500)
size of the match bars to machining allowance (510%)
Quality Assurance & Global Supply
At Stellar Alloys Steel Pipes and Tubes, every ASTM A105 carbon steel product is manufactured and supplied under strict quality control systems to ensure consistent performance, reliability, and compliance with international standards.
Quality Assurance Process
All materials undergo multi-stage inspection and testing to guarantee defect-free delivery:
- Raw material inspection before production
- Dimensional accuracy checks as per ASTM/ASME standards
- Mechanical testing including tensile strength, yield strength, and hardness
- Chemical composition verification through laboratory analysis
- Non-destructive testing (NDT) such as ultrasonic and radiographic testing
- Final visual and surface finish inspection before dispatch
Each batch is released only after meeting defined quality benchmarks.
Global Supply Capability
We supply ASTM A105 carbon steel round bars, hex bars, square bars, and flat bars to clients across global markets with efficient logistics support.
- Export-quality packaging for safe transportation
- On-time delivery across domestic and international destinations
- Custom size manufacturing based on project requirements
- Bulk supply capability for industrial and OEM applications
- Strong distribution network across Asia, Middle East, Europe, and Africa
Applications of ASTM A105 Carbon Steel Bars
ASTM A105 carbon steel bars are widely used in industries that require high strength, durability, and excellent performance under pressure and temperature conditions. Their versatility makes them suitable for both structural and engineering applications.
Key Applications
- Oil & Gas industry for pressure piping systems and components
- Petrochemical and chemical processing plants
- Power generation plants including thermal and nuclear sectors
- Pressure vessels, flanges, and valve components
- Refinery equipment and pipeline systems
- Structural fabrication such as frames, supports, and base plates
- Machinery parts requiring high strength and wear resistance
- Industrial plant equipment and maintenance components
- Construction of high-pressure handling systems
- General engineering and heavy-duty mechanical applications
Related Products
FAQs about ASTM A105 round bar
ASTM A105 round bar is a carbon steel bar manufactured as per ASTM A105 specification. It is widely used in pressure systems, piping components, and industrial applications due to its high strength and durability.
ASTM A105 and ASME SA105 refer to the same material specification. ASTM is the material standard, while ASME SA105 is the corresponding code used in pressure vessel and piping applications.
ASTM A105 contains carbon steel with elements such as carbon (max 0.35%), manganese (0.60–1.05%), silicon, phosphorus, sulfur, and small traces of nickel, chromium, and molybdenum.
The minimum tensile strength of ASTM A105 is approximately 70,000 psi (485 MPa), making it suitable for high-stress industrial applications.