Carbon & alloy steel
ASTM A53 Grade B covers seamless and welded carbon-steel pipe for mechanical and pressure applications and ordinary steam, water, gas and air lines.
- Spec ASTM A53 (Type S / E, Grade B)
- Density 7.85 g/cm³
Also known as / equivalents
| System | Designation |
|---|---|
| Also known as | A53, A53 Gr B |
Chemical composition
| Element | Min % | Max % |
|---|---|---|
| C | — | 0.30 |
| Mn | — | 1.20 |
| P | — | 0.05 |
| S | — | 0.045 |
| Cu | — | 0.40 |
| Ni | — | 0.40 |
| Cr | — | 0.40 |
| Mo | — | 0.15 |
| V | — | 0.08 |
| Fe | Bal. | — |
Mechanical properties
| Property | Value |
|---|---|
| Tensile strength (min) | 415 MPa (60.2 ksi) |
| Yield strength, 0.2% offset (min) | 240 MPa (34.8 ksi) |
Physical properties
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cm³ | 0.284 lb/in³ |
| Magnetic response | Magnetic | — |
Available forms & specifications
| Form | Specification | Size range |
|---|---|---|
| Pipe | ASTM A106, A53 | 1/8" – 24" NB |
| Flanges & forgings | ASTM A105 | 1/2" – 48" NB (larger on request) |
| Buttweld fittings | ASTM A234 | 1/2" – 48" NB |
| Bars | BS 970 (EN8) | 3 mm – 500 mm |
Corrosion & temperature resistance
Carbon steels have no inherent corrosion resistance; they are painted, galvanised or lined for corrosive service. A106 and A105 are rated for elevated-temperature pressure service.
Applications
ASTM A53 Grade B: Water, gas, air and structural piping. Process and utility piping, pressure-system flanges and fittings, shafts and general engineering.
ASTM A53 Grade B vs ASTM A106 Grade B
| ASTM A53 Grade B | ASTM A106 Grade B | |
|---|---|---|
| UNS | — | — |
| Key property | General-purpose pipe | Seamless high-temperature pipe |
| Typical use | Water, gas, air and structural piping | Process, steam and refinery piping |
| Cr (wt %) | ≤ 0.40 | ≤ 0.40 |
| Ni (wt %) | ≤ 0.40 | ≤ 0.40 |
| Mo (wt %) | ≤ 0.15 | ≤ 0.15 |
| C (wt %) | ≤ 0.30 | ≤ 0.30 |
| Tensile / yield (min, MPa) | 415 / 240 | 415 / 240 |
Frequently asked questions
What is ASTM A53 Grade B used for?
General-purpose pipe. Typical uses: water, gas, air and structural piping.
Is ASTM A53 Grade B magnetic?
Magnetic.
In which forms can I buy ASTM A53 Grade B from Rajkamal Metals?
Sheets & Plates, Pipes & Tubes, Round Bars & Rods, Structural Sections, Flanges, Buttweld Fittings, Socket Weld & Threaded Fittings, Fasteners, Dish Ends, Custom Orders. Sizes as per standard; other sizes on request.
Do you supply a Mill Test Certificate with ASTM A53 Grade B?
Yes. Actual values are given in the Mill Test Certificate (EN 10204 3.1) supplied with each order.
What is the difference between ASTM A53 Grade B and ASTM A106 Grade B?
ASTM A53 Grade B: general-purpose pipe. ASTM A106 Grade B: seamless high-temperature pipe. See the comparison table on this page.
Last updated: 30 October 2026. Grade names identify the supply range; designations are not engineering equivalents. Availability, make, origin and documentation are confirmed at quotation.
Request a quote
Need ASTM A53 Grade B?
Send the grade, form, size, quantity and destination. Price on request — every offer is prepared against your specification.