Xenith Steel
Xenith Steel
For light structural framing requiring efficient channel sections, the U beam (C-shaped channel per JIS G3192) delivers optimal section modulus for its weight in purlin and girt applications. Unlike I beams with symmetrical flanges optimized for bending about both axes, U channels concentrate material in the web and one flange face — making them ideal for secondary structural members where load direction is predictable. Available in JIS G3192 §6-tolerance (depth 50-400mm, flange width 30-150mm), EN 10025 S235JR/S355J2, GB/T 706 Q235B/Q355B, and ASTM A36/A572 Gr50 grades, Xenith Steel supplies U beams with full MTC per EN 10204 3.1. Our Cangzhou hot rolling line produces to JIS G3192 §6.1 dimension tolerances (±2mm depth for ≤ 75mm), verified by SGS or BV third-party inspection.

Welded Steel Pipe

Seamless Steel Pipe

OCTG

Structural Steel Section

Stainless Steel Pipe

Coating Steel Pipe

Steel Metal

Pipe Fittings

Special Products

Hot rolled U channel beam structural steel section JIS G3192
U beam C-shaped profile web and flange detail
U channel beam bundle steel strapped for export shipping
Hot rolled steel channel U beam inventory in stockyard

U Beam

  • Products details
  • Tolerance table
  • Chemical composition
  • Specification

-

A36, St37, S235J0, S235J2, St52, 16mn, S355JOQ195, Q215, Q235B, Q345B, S235JR, S355JR, S355, SS440, SM400A, SM400BA572, GR50, GR60, SS540

Dimensions

50* 37* 4.5-400* 104* 14.575* 40* 3.8* 7-152* 76* 6.4* 9140* 60* 7* 10-200* 75* 8.5* 11.5

Length

6m, 9m, 12m or as customer requirement

Technology

Hot rolled

Standard

ASTM,JIS,BS, DIN,EN

Surface

Galvanized, paint;or as your request

Certification

ISO, SGS,BV


Application of Steel U Beam:

Tracks & sliders for machines, doorways, etc.

Posts and supports for building corners, walls & railings.

Protective edges for walls.

Decorative elements for constructions like ceiling channel system.

Frames or framing material for construction, machines.

  • Process

  • Tests

A load is applied at the center of a beam using weights, and the resulting midspan deflection is measured. The elastic stiffness of the beam is determined and compared to published values for various beam materials and cross sectional shapes.

  • Packing & Delivery



Frequently Asked Questions

1. What dimensional tolerances apply to U channel beams per JIS G3192?

JIS G3192:2009 §6 specifies channel section tolerances: depth ±2mm for ≤ 75mm, ±2.5mm for 75-150mm, ±3mm for > 150mm. Flange width ±2mm for ≤ 75mm, ±2.5mm for > 75mm. Web thickness +0.60/-0.40mm for ≤ 6mm, +0.70/-0.50mm for > 6mm per §6.2. Mass tolerance ±3% per §7. Length tolerance +40/-0mm for standard 6-12m. EN 10034:1993 Table 2 specifies depth ±2mm (≤ 180mm), ±3mm (180-400mm). GB/T 706-2016 §5.2.1: depth ±2mm (≤ 200mm), ±2.5mm (200-400mm). Straightness: 0.15% of length per EN 10034 §8.4.

2. What are the mechanical property differences between A36, SS400, and Q355B U beams?

ASTM A36/A36M-19 §5: yield ≥ 250 MPa (t ≤ 200mm), tensile 400-550 MPa, elongation ≥ 20% in 200mm. JIS G3101:2015 SS400: tensile 400-510 MPa, yield ≥ 245 MPa (t ≤ 16mm), ≥ 235 MPa (16-40mm) per §4. GB/T 1591-2018 Q355B: yield ≥ 355 MPa (t ≤ 16mm), ≥ 345 MPa (16-40mm), tensile 470-630 MPa, elongation ≥ 21%. Charpy V-notch at 20°C ≥ 27 J per Q355B §6.3. A572 Gr50 per ASTM A572/A572M-21: yield ≥ 345 MPa (t ≤ 100mm), tensile ≥ 450 MPa. CEV per IIW formula ≤ 0.45% for weldability per EN 10025-1 §7.4.

3. How does the hot-rolling process achieve U channel shape and consistent mechanical properties?

U channels are hot-rolled using a universal mill with horizontal rolls forming the web and vertical rolls shaping the flanges. Reheating temperature 1150-1250°C per EN 10025-1 §6.2, finishing at 950-1050°C. The C-shaped profile is formed in multiple passes: breakdown, roughing, and finishing stands. Per GB/T 706-2016 §5.3, the inner radius between web and flange is 8-15mm depending on section size. Controlled cooling on cooling bed achieves ferrite-pearlite microstructure per ASTM E112 grain size 7 or finer. TMCP per EN 10025-4 optional for fine-grain grades. Normalizing rolling achieves minimum elongation of 20% in 200mm.

4. What quality control tests are performed during U beam manufacturing?

QC per ASTM A6/A6M-22 §19 and EN 10204:2004. Six checks per lot:

(1) Dimensional inspection per §12 — depth, flange width, web thickness, flange squareness, camber, sweep using calibrated gauges per ISO 6508-1.

(2) Tensile testing per ASTM A370 §7 — yield, tensile, elongation on longitudinal specimens.

(3) Chemical analysis per ASTM E415 — C ≤ 0.23%, CEV ≤ 0.45% per IIW formula (EN 10025-1 §7.4).

(4) Bend test per ASTM A6 §20.3 — 180° around 1.5t mandrel.

(5) Surface inspection per §11 — no laps or seams exceeding 0.5mm depth.

(6) Ultrasonic testing per ASTM A435 optional. MTC per EN 10204 3.1 includes all results.

5. What are the allowable load design values for U channels per AISC and Eurocode?

Per AISC 360-22 §F3: for channels bending about major axis, nominal flexural strength Mn = Mp = Fy × Zx ≤ 1.6Fy × Sx for compact sections. ASD: Fb = 0.66Fy for compact (Table F2-1). Shear per §G3: Vn = 0.6Fy × Aw × Cv, φv = 0.9. Per Eurocode 3 EN 1993-1-1:2005 §6.2.5, bending moment resistance Mc,Rd = Wpl × fy / γM0 for Class 1-2 sections. γM0 = 1.0. Deflection per AISC §L3: L/360 live load for roofs. Biaxial bending per §H1: (Mrx/Mcx) + (Mry/Mcy) ≤ 1.0.

6. What third-party inspection and certification options are available for U beam orders?

Third-party inspection by SGS, BV, ABS, or Lloyds per ISO 2859-1 AQL 4.0. MTC per EN 10204 3.1 (inspection certificate 3.1) or 3.2 (certificate with third-party witness). Custom lengths 1-18m ±2mm per EN 10034 §9. Packaging per ASTM A6 §16: multi-beam bundles, steel straps at 2m intervals with edge protectors, VCI paper + PE film for sea shipments per ISO 9227. Container loading: 20ft 18-22 tons, 40ft 26-28 tons with dunnage per IMO/ILO guidelines. Storage on sleepers with 300mm ground clearance per ISO 8501-1 C grade.

  • Tolerance table

The dimensions do not exceed the acceptable tolerance of±6 mm in either of the primary axes

  • Chemical composition

Designation

Grade

Chemical Composition(%)

C

Si

Mn

P

S

Nb

V

CE


ASTM A36

A36

0.26max

0.40max

-

0.040max

0.050max

-

.

.

-

ASTMA572

Grade 42

0.21 max

0.40mac

1.35max

0.040max

0.050max

0.005-0.050

0.010*0,15

-

-


Grade 50

0.23max

0.40max

1.35max

0.040max

0.050max

0 005-0.050

0.010-0.15

-

,

ASTMA36 /A572G50

A36/

A57250

0.22(nax

0.40max

0.50-1.35

0.040max

0.050max

0.005-0.050

0.010-0.15

-

.

JIS G 3101

SS400


-

.

0.050max

0.050max



,

-

0.18max

0.55max

1.60max

0.035max

0.035max


*

-

-


SM490YA

0.20max

0.55max

1.60max

0.035max

0.035max


-

*

*


SM490YB

0.20(nax

0.55max

1.60max

0.035max

0.035max


*

*

-


SM520B

0.20max

0.55max

1.60max

0.035max

0.035max


-

-

-

EN 10025

S235JRG2

0.17(nax

-

1.40max

0.045max

0.045max


-

0.35max

90max


S275JR

0.21(nax

.

1.50max

0.045max

0.045max


-

0.40max

90max


S275JO

0.18max

-

1.50max

0.040max

0.040max


*

0.40max

90max


S355JR

0.24max

0.55max

1.60max

0.045max

0.045max


-

0.45max

90max


S355JO

0.20(nax

0.55max

1.60max

0.040max

0.040max


-

0.45max

90max

DIN 17100

RST37-2

0.17(nax

.

.

0.050max

0.050max


*

-

90max


ST44-2

0.21 max

-

-

0.050max

0.050max


*

-

90max

BS 4360

40B

0.20max

0.50max

1.50max

0.050max

0.050max


-

-



40C

0.18max

0.50max

1.50max

0.050max

0.050max


-

-

*


43A

0.25max

0.50max

1.60max

0.050max

0.050fnax


-

-

-


43B

0.22(nax

0.50max

1.50max

0.050max

0.050max

*

-

-

-


43C

0.18max

0.50max

1.50max

0.050max

0.050max



-



50A

0.23max

0.50max

1 60max

0.050max

0.050max

0.0034).1

0.003-0.1

-

-


50B

0.20max

0.50max

1.50max

0.050max

0.050max

0.0034),1

0.003-01

-

-


50C

0.20max

0.50max

1.50max

0.050max

0.050max

0.0034).1

0.003-0.1

-

*

  • Inquiry