April 14 Lanzhou Steel Market Price Quotes

April 13, 2021

The product name specification material steel factory/origin price (yuan/ton) is Φ6.5mm higher than that of last month than last week. General line Φ6.5mm Q235 8 steel 5030 30 130 230 High line Φ6.5-10mm Q235 Eight steel 5080 30 80 260 High line Φ6 .5-10mm Q235 Wine Steel 5080 30 80 260 Rebar Φ12-14mm HRB335 Eight Steel 5360 0 40 360 Rebar Φ12-14mm HRB335 Wine Steel 5360 0 40 360 Rebar Φ12-14mm HRB335 Longsteel 5320 0 40 350 Thread Steel Φ16 -25mm HRB335 Eight Steel 5050 10 70 300 Rebar Φ16-25mm HRB335 Wine Steel 5050 10 70 300 Rebar Φ16-25mm HRB335 Dragon Steel 5010 10 90 280 Hot Roll 2.75*1250*C Q235 Taigang 5700 50 100 280 Hot Roll 3.0 *1250*C Q235 TISCO 5600 50 50 230 Hot Roll 3.0*1250*C Q235 Clad Steel 5150 50 50 200 Hot Roll 3.0*1250*C Q235 Jiu Steel 5200 50 50 250 Hot Roll 3.75-5.5*1500*C Q235 Wine Steel 5400 50 50 280 Hot Roll 3.5-5.5*1500*C Q235 Wine Steel 5400 50 50 280 Hot Roll 3.5-5.5*1500*C Q235 Steel 5400 50 50 280 Cold Plate 0.5*1000*2000 08KP Steel Card 6750 0 0 0 Cold plate 1.0*1000*2000 08KP Steel plate 6600 0 0 Cold plate 1.0*1000*C SPCC Eight steel 6450 0 0 0 Cold plate 1.0*1000*C SPCC Steel plate 6450 0 0 Plate 8mm Q235B Wine and steel 6600 0 0 450 Plate 10mm Q235B Wine Steel 6300 0 0 400 Plate 12mm Q235B Wine Steel 6250 0 0 350 Plate 14-20mm Q235B Wine Steel 6150 0 0 350 Plate 14-20mm Q235B Jinan Steel 6150 0 0 350 Medium Thick plate 12mm Q235B Lin steel 6150 0 0 350 Plate 14-20mm Q235B Lin steel 6130 0 0 350 Low alloy plate 14-20mm Q345B Wine steel 6350 0 0 350 Welded pipe 1.5 inch Q235 Clad steel 5250 0 0 0 Welded pipe 3 inch Q235 Baotou Steel 5600 0 0 0 Welded pipe 4 inch Q235 Clad steel 5650 0 0 0 Seamless pipe Φ108*4.5mm 20# Anshan 6600 0 0 0 seamless pipe Φ219*7mm 20# Angang 6550 0 50 50 Seamless pipe Φ159*6mm 20 # Baotou Steel 6550 0 50 50 Seamless Pipe Φ436*11mm 20# Clad Steel 7600 0 0 0 Angle Steel 50*5# Q235 Anyang 5450 0 50 200 Angle Steel 140*12mm Q235 Tang Steel 5350 0 50 250 Channel Steel 16# Q235 A Steel 5450 0 50 200 Channel 25# Q235 Laiwu Steel 5480 0 50 200 I-beam 16# Q235 Anshan Baode 6100 0 150 150 I-beam 20# Q235 Anshan Baode 6100 0 150 150

"Gravity Die Casting. A permanent mould casting process, where the molten metal is poured from a vessle of ladle into the mould, and cavity fills with no force other than gravity, in a similar manner to the production of sand castings, although filling cn be controlled by tilting the die."

Gravity Die Casting

Sometimes referred to as Permanent Mould, GDC is a repeatable casting process used for non-ferrous alloy parts, typically aluminium, Zinc and Copper Base alloys.

The process differs from HPDC in that Gravity- rather than high pressure- is used to fill the mould with the liquid alloy.

GDC is suited to medium to high volumes products and typically parts are of a heavier sections than HPDC, but thinner sections than sand casting.

There are three key stages in the process.

  1. The heated mould [Die or Tool] is coated with a die release agent. The release agent spray also has a secondary function in that it aids cooling of the mould face after the previous part has been removed from the die.
  2. Molten metal is poured into channels in the tool to allow the material to fill all the extremities of the mould cavity. The metal is either hand poured using steel ladles or dosed using mechanical methods. Typically, there is a mould [down sprue" that allows the alloy to enter the mould cavity from the lower part of the die, reducing the formation of turbulence and subsequent porosity and inclusions in the finished part.
  3. Once the part has cooled sufficiently, the die is opened, either manually or utilising mechanical methods.

Advantages

  • Good dimensional accuracy
  • Smoother cast surface finish than sand casting
  • Improved mechanical properties compared to sand casting
  • Thinner walls can be cast compared to sand casting
  • Reverse draft internal pockets and forms can be cast in using preformed sand core inserts
  • Steel pins and inserts can be cast in to the part
  • Faster production times compared to other processes.
  • Once the tolling is proven, the product quality is very repeatable.
  • Outsourced Tooling setup costs can be lower than sand casting.

Gravity Casting Parts

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