Carbon & alloy steel
ASTM A105 covers forged carbon-steel piping components — flanges, fittings and valve parts — for ambient and higher-temperature pressure systems.
- Spec ASTM A105
- Density 7.85 g/cm³
Also known as / equivalents
| System | Designation |
|---|---|
| Also known as | A105, SA105 |
Chemical composition
| Element | Min % | Max % |
|---|---|---|
| C | — | 0.35 |
| Mn | 0.60 | 1.05 |
| P | — | 0.035 |
| S | — | 0.040 |
| Si | 0.10 | 0.35 |
| Cu | — | 0.40 |
| Ni | — | 0.40 |
| Cr | — | 0.30 |
| Mo | — | 0.12 |
| V | — | 0.08 |
| Fe | Bal. | — |
Mechanical properties
| Property | Value |
|---|---|
| Tensile strength (min) | 485 MPa (70.3 ksi) |
| Yield strength, 0.2% offset (min) | 250 MPa (36.3 ksi) |
| Hardness | 187 HB max |
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 A105: Pressure flanges, fittings, valves. Process and utility piping, pressure-system flanges and fittings, shafts and general engineering.
Frequently asked questions
What is ASTM A105 used for?
Forged flanges and fittings. Typical uses: pressure flanges, fittings, valves.
Is ASTM A105 magnetic?
Magnetic.
In which forms can I buy ASTM A105 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 A105?
Yes. Actual values are given in the Mill Test Certificate (EN 10204 3.1) supplied with each order.
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.
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