ASME SA105
ASME SA105 Carbon Steel Forging
ASME SA105 is a widely used Carbon Steel forging grade designed for high-temperature and high-pressure applications. It is commonly used in piping systems to manufacture flanges, valve components, fittings, and pressure-containing parts for thermal power plants, oil & gas refineries, petrochemical industries, and boiler systems.
SA105 offers excellent strength, weldability, and durability. It is suitable for both elevated and ambient temperature services, making it highly reliable in steam lines, heat-exchangers, and pressure vessels.
Key Features
High strength and durability
Excellent machinability & weldability
Suitable for high-temperature & high-pressure service
Good corrosion resistance in mild media
Cost-effective forging material for industrial applications
Widely accepted global standard for flanges & fittings
ASME SA105 Specifications
| Standard | ASME SA105 |
|---|---|
| Material | Carbon Steel Forgings |
| Delivery Condition | Normalized / Heat-Treated / Annealed |
| Manufacturing | Forged / Rolled / Machined |
| Applications | Flanges, Fittings, Valves, Piping Components |
ASME SA105 Equivalent Grades
| Standard | Grade |
|---|---|
| ASTM | A105 |
| EN | C22.8 / 1.0460 |
| DIN | St35.8 / St45.8 |
| JIS | JPI-7S-15 |
| Indian Standard | IS 2002 Gr. II |
Available Sizes
| Product | Size Range |
|---|---|
| Flanges | ½” – 48″ NB |
| Forged Fittings | ½” – 4″ NB |
| Forged Bars / Blocks | Custom Sizes |
| Valve Components | Custom Forgings |
Chemical Composition
| Element | % |
|---|---|
| Carbon (C) | 0.35 Max |
| Manganese (Mn) | 0.60 – 1.05 |
| Phosphorus (P) | 0.035 Max |
| Sulfur (S) | 0.040 Max |
| Silicon (Si) | 0.10 – 0.35 |
| Copper (Cu) | 0.40 Max |
| Nickel (Ni) | 0.40 Max |
| Chromium (Cr) | 0.30 Max |
| Molybdenum (Mo) | 0.12 Max |
| Vanadium (V) | 0.08 Max |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 485 MPa Min |
| Yield Strength | 250 MPa Min |
| Elongation | 30% Min |
| Reduction of Area | 30% Min |
| Hardness | 187 HBW Max |
Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | ~1425 – 1540°C |
| Thermal Conductivity | 45 W/m-K |
| Modulus of Elasticity | 190 – 210 GPa |
Type of ASME SA105 Flanges
Corrosion Resistance
SA105 provides good resistance to:
Mild atmospheric conditions
Steam & water media
Petroleum products
For aggressive chemical or salty environments, a protective coating or alloy steel alternative is recommended.
Heat Resistance
SA105 performs well at elevated temperatures, suitable up to ~450–550°C, depending on service conditions and pressure.
Heat Treatment
Normalizing
Annealing
Stress Relief
Quenching & Tempering (if required)
Heat treatment improves toughness, grain structure, and mechanical performance.
Welding
Excellent weldability using standard welding methods: SMAW, TIG, MIG
Pre-heating recommended for thick sections
Post-weld heat treatment may be required depending on thickness & service condition
Fabrication
Easily machinable & forgeable
Can be hot-worked or cold-worked
Suitable for precision machining for flanges & valve bodies
Applications
Oil & Gas Pipelines
Thermal & Nuclear Power Plants
Petrochemical & Refining Plants
Boiler & Pressure Vessels
Heat Exchangers
Steam & Water Lines
Valve & Pump Components
Pressure Piping Systems