ASTM A283 Grade C SSAW Pipe

ASTM A283 Grade C SSAW Pipe: Properties and Equivalent Materials

Detailed material data for ASTM A283 Grade C steel used in spiral submerged arc welded (SSAW) pipes, including chemistry, mechanical and thermal properties, international equivalents, and application guidance.

Hot rolling (as-rolled, normalized), cold forming, spiral forming and submerged arc welding for pipe production

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ASTM A283 Grade C SSAW Pipe Introduction

ASTM A283 Grade C is a low-carbon structural steel plate grade widely used for general fabrication and welded structures. When supplied as coiled strip and formed into Spiral Submerged Arc Welded (SSAW) pipes, it offers good weldability, adequate strength, and cost-effective performance for moderately loaded applications such as water transmission lines, piling, and low-pressure pipelines. The material exhibits a minimum yield point of 205 MPa and tensile strength between 380 and 515 MPa. Its low carbon content ensures easy forming and welding, while controlled manganese provides improved toughness. Key features:

Designated for structural and pressure applications in as-rolled or normalized condition
Manufactured into SSAW pipes via continuous forming and submerged arc welding
Available in a wide range of thicknesses and diameters
Generally supplied with test certificates indicating heat analysis and mechanical properties

ASTM A283 Grade C SSAW Pipe Chemical Composition

Chemical requirements according to ASTM A283 Grade C. Values represent ladle analysis; product analysis may have slightly wider tolerances. Note: Elements like silicon may be present but are not specified unless required for specific applications. Copper is specified only when copper-bearing steel is ordered.

Element	Standard Value (max, unless range)	Remarks
Carbon (C)	≤0.24	Heat analysis
Manganese (Mn)	≤0.90	For plates £1 in. (25 mm); for thicker plates, Mn 0.60-0.90% by agreement
Phosphorus (P)	≤0.035	Heat analysis
Sulfur (S)	≤0.040	Heat analysis
Silicon (Si)	—	Not specified; may be present as residual
Copper (Cu)	≥0.20 (when specified)	For copper-bearing steel (optional)

ASTM A283 Grade C SSAW Pipe Thermal and Electrical Physical Properties

Physical properties for low‑carbon steel representative of ASTM A283 Grade C. Note: These values are typical for general carbon steels at ambient temperature and are not specified in ASTM A283. They may vary slightly depending on exact chemistry, processing, and temperature.

Property	Typical Value	Unit	Test Condition / Remarks
Density (ρ)	7.85	g/cm³	Ambient temperature (20°C)
Modulus of elasticity (E)	200	GPa	Ambient temperature
Shear modulus (G)	80	GPa	Typical for carbon steel
Poisson's ratio (ν)	0.3	—	Typical
Thermal expansion coefficient (α)	12.0	10⁻⁶/K	20°C to 100°C
Thermal conductivity (λ)	50 – 55	W/(m·K)	At 20°C
Specific heat capacity	480	J/(kg·K)	At 20°C
Electrical resistivity (ρ_e)	0.15 – 0.20	μΩ·m	At 20°C

ASTM A283 Grade C SSAW Pipe Mechanical Properties

Tensile properties as per ASTM A283 Grade C for plates and SSAW pipe base metal. Testing conditions: Room temperature, transverse or longitudinal as specified in standard. Elongation measured on 200 mm (8 in.) and 50 mm (2 in.) gauge lengths. No impact or bend test requirement in basic specification unless supplementary requirements apply.

Property	Standard Required Value	Unit	Test Condition / Remarks
Yield point (ReH)	≥205	MPa	All thicknesses; 0.2% offset method may be used if yield point is not pronounced
Tensile strength (Rm)	380 – 515	MPa	All thicknesses
Elongation (200 mm gauge)	≥22	%	In 8 in. (200 mm) gauge length
Elongation (50 mm gauge)	≥25	%	In 2 in. (50 mm) gauge length

ASTM A283 Grade C SSAW Pipe Exact Equivalent Standards and Replaceable Grades

Country/Region	Standard	Grade	Remarks

ASTM A283 Grade C SSAW Pipe Application Introduction

ASTM A283 Grade C, especially in SSAW pipe form, serves a broad range of structural and conveying applications where moderate strength and good weldability are sufficient. Common usage:

Water transmission and distribution pipelines
Low-pressure oil and gas gathering lines
Structural pipe piles for foundations and marine structures
General structural members in buildings and bridges
Conveyor tubes, sign poles, and mechanical tubing

Product Applications: Spiral submerged arc welded (SSAW) steel pipes, Hot-rolled plates and coils, Structural hollow sections, Welded beams and columns, Tank and vessel shells

Processed into products: Pipe piles for foundations, Water mains and penstocks, Conveyor rollers and casing pipes, Bridge and building structural bracings, Low-pressure fluid transport pipelines

Application industries: Civil and infrastructure construction, Water and wastewater management, Oil and gas (low-pressure, non-critical), Marine and piling, General manufacturing and fabrication

ASTM A283 Grade C SSAW Pipe Similar / Approximate Alternative Materials

Country/Region	Standard	Grade	Remarks
China	GB/T 700	Q235B	Min. yield 235 MPa, tensile 370-500 MPa; C ≤0.20%; commonly used for structural pipes, not fully identical
Europe	EN 10025-2	S235JR	Min. yield 235 MPa, tensile 360-510 MPa; chemistry differs slightly; widely substituted for A283 Gr.C
Japan	JIS G3101	SS400	Tensile 400-510 MPa, yield ≥245 MPa; chemistry not specified by JIS; general structural grade
International	ISO 630-2	S235B	Tensile 360-510 MPa, yield ≥235 MPa; comparable low-carbon structural steel

Notes:
Additional information:
For SSAW pipe production, the steel is usually supplied as hot‑rolled coil with thicknesses from approx. 4 mm upwards.
Excellent weldability due to low carbon equivalent; no preheating normally required for moderate thicknesses.
Supplementary requirements (impact toughness, ultrasonic testing, tighter chemistry limits) may be specified when ordering per ASTM A283 or other standards.
Corrosion protection (coating, lining) is recommended for buried or immersed applications.