Project Description

Commitment to You

We are committed to integrate steel resources in china and serve the global steel market. We have 15+ years of experience in steel researching, production, managing and sales.

Our ability to purchase materials directly from leading mills will give you the competitive edge. Any Questions Just Call +86-731-89903933

Application：

  1. Parts requiring excellent fatigue resistance eg. shafts, gears.
  2. Various safety-critical mechanical parts.

Standard:

EN10297 Seamless Circular Steel Tubes for Mechanical and General Engineering Purposes

Steel Grades:

EN10297: 1.1127 38Mn6

Competitive Advantage:

  1. High strength.
  2. High tenacity.
  3. Good hardenability.
  4. High resistance to thermal properties.
  5. Competitive price.
  6. Fast production leadtime.

Sizes Range:

OD:40mm-810mm, WT:2mm-100mm

Chemical Composition(%):

Grades C Si Mn P S
40Mn2 0.37-0.44 0.17-0.37 1.40-1.80 0.025 max 0.025 max
38Mn6 0.34-0.42 0.15-0.35 1.40-1.65 0.035 max 0.035 max

Outer Diameter Tolerances

+/-1%, or +/-0.5mm (Chose the bigger one)

Wall Thickness Tolerances

Scope of Outer Diameter Ratio of Wall Thickness and Outer Diameter (WT/OD) Tolerance
102mm max / +/12.5% or +/-0.4mm (Chose the bigger one)
102mm min 0.05 max +/15% or +/-0.4mm (Chose the bigger one)
102mm min 0.05-0.10 +/12.5% or +/-0.4mm (Chose the bigger one)
102mm min 0.10 min (-10%, +12.5%)

Delivery Conditions

  1. Hot Rolled only.
  2. Stress Relieved.
  3. Annealed.
  4. Normalized.
  5. Quenched and Tempered.
  6. Surfaces Conditions
  7. Black surface with oxygen skin.
  8. Grinded for external or internal surface, or external and internal surface.
  9. Peeled for external or internal surface, or external and internal surface.

Mechanical Properties (Quenched and Tempered) (T=20°C if not differently stated)

Wall Thickness (mm) Tensile Strength (Mpa) Yield Strength(Mpa) Elongation (Longitudinal) (%) Elongation (Transverse) (%)
16 max 670 max 400 min 14 min 12 min
16-40 620 max 380 min 15 min 13 min
40-80 570 max 360 min 16 min 14 min

Recommended Heat Treatment Temperatures

Heat Treatment Temperatures (°C)
Annealing 650-700
Normalizing 850-880
Austenitizing 820-850
Tempering 540-680

Tube ends:

The hollow bar comes with square cut and deburred ends.

Certification:

The hollow bar is supplied with 3.1.B inspection certificate,according to the standards EN 10204 and ISO 10474.

Identification and Marking:

The hollow bar is marked in indelible ink, the details being repeated along the entire length of each tube and on a label, as follows:
Manufacturer’s trademark – manufacturing standard – dimensions -steel grade – supply condition – cast no. – item number.

Packaging:

The hollow bar comes in strapped bundles. The minimum weight of each bundle is 2000kg; the maximum bundle weight being 5000kg, with a minimum of 4 pieces.

Experienced 15+ Years

Our ability to purchase materials directly from leading mills at the best possible price will give you the competitive edge. This coupled with a skilled workforce dedicated to embracing the demands of the markets.

We Can Supply Follows Products with High Quality:

  1. Cold Rolled Steel Tube
  2. Cold Drawn Steel Tube
  3. Hollow Bar
  4. Honed Tube
  5. Plated Tube
  6. Plated Bar
  7. Boiler Tube

All Products According Quality Standard Strictly:

  1. ASTM: ASTM A519, ASTM A513.
  2. JIS:JIS G3441, JIS G3445, JIS G3466, JIS G3459.
  3. DIN: DIN1626, DIN1629, DIN2391, DIN2393, DIN2448, DIN2458.
  4. EN: EN10305.
  5. BS: BS6323.

Wide Range of Pipes to Fit Your Industry:

  1. OD from 5mm to 820mm.
  2. Wall Thickness from 0.1 to 100mm.
  3. Length up to 50mtr per pc.

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