SM400 C-Channel Steel Beam

Gnee Steel (Tianjin) Co., Ltd. is one of the most professional sm400 c-channel steel beam manufacturers and suppliers in China, also supports customized service. If you're going to buy sm400 c-channel steel beam made in China, welcome to get free sample from our factory. Quality products and low price are available.

SM400 channel steel is a structural steel that falls under Japanese Industrial Standard (JIS) G3106, which specifies rolled steels for welded structures. The "SM" in SM400 stands for "steel for mechanical structures," while the "400" indicates that it has a minimum tensile strength of 400 MPa.

SM400 channel c steel is available in three grades:

SM400A c channel steel: basic grade with no specific requirements for impact toughness.

SM400B channel steel beam: impact tested at 0°C, offers improved toughness compared to SM400A.

SM400C steel channel section: impact tested at -20°C, offers enhanced low-temperature performance.

Chemical composition of SM400 c section steel:

Carbon (C): ≤0.23%
Silicon (Si): ≤0.35%
Manganese (Mn): ≤1.60%
Phosphorus (P): ≤0.035%
Sulfur (S): ≤0.035%

The exact composition may vary depending on the thickness and specific grade of steel, SM400B structural channel and SM400C channel beam have stricter control over impurities to improve weldability and toughness.

Mechanical properties of SM400 channel steel:

Tensile strength: 400–510 MPa
Yield strength:
≥ 245 MPa (thickness ≤ 16 mm)
≥ 235 MPa (thickness 16–40 mm)
≥ 215 MPa (thickness > 40 mm)
Elongation:
≥ 17% (thickness ≤ 16 mm)
≥ 21% (thickness 16–40 mm)
≥ 23% (thickness > 50 mm)
Impact toughness (Charpy V-notch test):
SM400A: Not specified
SM400B: ≥ 27 J at 0°C
SM400C: ≥ 27 J at -20°C

Physical properties of SM400 c channel bar

Shape: SM400 channel has a C-shaped cross section with two flanges connected by a web, providing excellent structural support and bending resistance.

Density: Approximately 7850 kg/m³ (typical density of carbon steel).

Dimensions: Available in a variety of sizes, typically from 75x40 mm to 200x90 mm (height x width), GNEE can customize to customer requirements.

Comparison of SM400 c channel beam

SS400 (JIS G3101): SS400 structural steel channel is another common Japanese structural steel with similar tensile strength (400-510 MPa), designed for general use and not specifically for welded structures. SM400 has better weldability and toughness, especially in grades B and C.

ASTM A36 (USA): SM400 structural c channel is comparable to ASTM A36, with similar strength and weldability.

S235 (EN standard): European S235 steel has a lower yield strength (235 MPa) but has similar applications and weldability to SM400A.

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