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

20MnMoNi4-5 1.6311 Special Steel for Boiler and Pressure Vessel

1. 1.6311 Applications

  • Boiler installations in accordance with Technical Rules TRD 101, EN 12952 etc. for temperatures up to 375 °C.
    • Pressure vessel installations in accordance with the AD 2000-Merkblätter series W and HP for temperatures of – 10 °C to 375 °C.

2.All Grades Comparison

DIN EN
1.6311 20MnMoNi4-5

3.Quality Standard

EN 10028-2 Part 2: Non-alloy and alloy steels with specified elevated temperature properties

4. 1.6311 Chemical Composition(%)

C Mn Si P S Cr Ni Mo
0.17-0.23 1.00-1.50 0.40 max 0.035 max 0.035 max 0.50 max 0.40-0.80 0.45-0.60

 

5.Mechanical Properties(T=20°C if not differently stated)

Process Diameter(mm) Tensile Strength Rm (Mpa) Yield Strength Rp0.2 (Mpa) Elongation A5 (%) Impact Value Kv (J) Room Temperature
QUENCHED AND TEMPERED 40 max 590-750 470 min 18 min 35 min
QUENCHED AND TEMPERED 40-60 590-730 460 min 18 min 35 min
QUENCHED AND TEMPERED 60-100 570-710 450 min 18 min 35 min
QUENCHED AND TEMPERED 100-160 570-710 440 min 18 min 35 min
QUENCHED AND TEMPERED 160-330 550 min 390 min 17 min 39 min

6. 1.6311 HEAT TREATMENT:

  • Stress Relieving:Heat to 580 – 620°C. Generally the maximum stress relieving time shall be restricted to 150 min. If it exceeds 90 min or in case of repeated heat treatment the lower range of recommended temperatures shall apply.
  • Austenitizing + Quenchingg:Heat to 870 to 940 °C. After temperature achievement over the whole section cooling in water
  • Tempering:Heat to 610 to 690 °C. Holding 30 min time after temperature achievement over the whole section, cooling in still air

7.Forming properties and weldability:

1.6311 Special Steel can be hot or cold formed and can be welded and flame cut according to the general procedures. The guidelines
according to EN 1011 and VdTÜV-material data sheet 440/1 shall be observed. For the fabrication of pressure vessels in accordance with AD 2000 Merkblatt in the context of PED qualified welding consumables have to be applied.

 

8.Mill′s test certificate:

EN 10204/3.1 with all relevant data reg. chem. composition, mech. properties and results of testing.

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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