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Steel price index early warning report

The current domestic situation of supply and demand of double weak in hong kong-listed whole, on the one hand, near the Spring Festival, site shutdown, end demand weakening trend is obvious; On the other hand, steel mills for losses and money is tight, production enthusiasm is not high also, supply is low. After this week, fell back quickly, the early stage of the low-cost resources basic digestion, starting next week, the market will gradually turn into marketable no market situation, the domestic steel prices are expected to stabilize finishing moves. Based on this, the market remains neutral evaluation – blue warning next week。
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Red wine is bad for you, Britain say experts

Red wine is bad for your health, experts reveal in a new report.
In a u-turn, Government experts have dismissed the supposed health benefits of wine and are set to rewrite the rule book on the nation’s alcohol consumption, according to reports.
A landmark report by Chief Medical Officer Dame Sally Davies will destroy the long-held belief that red wine can cut the risk of cancer, heart disease and memory loss when drunk in moderation, the Sun reported.
In the first overhaul of alcohol guidelines for two decades, doctors will reportedly warn that there is no “safe” level of alcohol consumption and drinking just a small amount may in fact increase the risk of some cancers.
A source said: “The report will send a clear signal that the dangers of drinking are far more than previously thought.”
The review was launched in 2012 and its findings are expected to reflect the latest research that links even occasional alcohol consumption to health problems in later life.
The Government currently advises men do not drink more than three to four units per day – up to 21 units or less per week – while women should drink no more than two to three units a day, or 14 units per week.
Under the new guidelines the gender difference will be thrown out and drinkers will be to keep off the booze for at least two days a week in order to allow their livers to recover.
A recent study by University College London found patients who gave up for four weeks saw benefits for their liver function, blood pressure and cholesterol levels and were also at lower risk of developing diabetes and liver disease.
And a report by the National Institute for Health and Clinical Excellence (Nice) advised middle-aged people there is “no safe level of alcohol consumption”.
It says the same health benefits can be more easily achieved with exercise and healthy eating.

So now don’t buy Red Wine.  Buy Steel is better from OTAI SPECIAL STEEL.  😀

High-speed-tool-steel-SKH59-ROUND-BAR

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2015 China Steel Market Review & 2016 China Steel Market Forecast

Now Chinese Steel industry are in the period of transformation.  2015 Most Chinese Steel company and Factory were Huge losses. More than 30% Small Steel produce manufacture company close down.

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Happy new year! Happy 2016!

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SKD11/ Cr12MoV/ D2 steel plate stock bottom price sale

SKD11/ Cr12MoV/ D2 steel plate stock bottom price sale

125×510 1pcs
130×510 1pcs
135×510 1pcs
140×510 1pcs
150×510 1pcs
165×510 1pcs
175×510 1pcs
190×510 1pcs
200×510 1pcs
210×510 1pcs
230×510 1pcs
250×510 1pcs
length about 3500mm
by SEP 1921 -84 C/c ultrasonic inspection
if you have any needs, pls tell me as soon as possible. because this is bottom price sale

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Otai special steel 2015-12-04 stock list.

Otai special steel 2015-12-04 stock list.
AISI P20 , 1.2312, 1.2311,Nak80 steel stock list as photos. any interested, pls contact to johnlong@otaisteel.com

Otai Special steel Co,.Ltd
Address: NO.3 XianSha Industial Zone ,GaoBu town,DongGuan City, GuangDong Province, China.
Tel:+86-0769-88704912/88705839 FAX: +86-0769-88705839
Email: jack@otaisteel.com
 Stock  List
Grade AISI 4140,Hot rolled , Black surface.normalizing
Chemical Composition
(For reference only)
C Si Mn Cr Mo Ni P≤ S≤ Others
0.38~
0.43
0.15~
0.35
0.75~
1.00
0.80~
1.10
0.15~
0.25
/ 0.035 0.04 /
14×185 25×195 26×180 30×170
30×180 35×180 40×290 65×155
80×160 90×250
Grade DIN 1.2311,Hot rolled , Black surface.normalizing
Chemical Composition
(For reference only)
C Si Mn Cr Mo Ni P≤ S≤ Others
 0.35~0.45  0.20~0.40 1.30~1.60  1.80~2.10 0.15~0.25 / 0.035 0.035 /
36x315x1130 56x590x400 86x180x1040 86x730x1050
860x610x850 86x710x605 100x510x1370 100x510x840
125x310x720 125x310x760 135x450x610 135x460x600
135x460x610 245x805x910 240x800x910 245x480x960
Grade DIN 1.2312,Hot rolled , Black surface.normalizing
Chemical Composition
(For reference only)
C Si Mn Cr Mo Ni P≤ S≤ Others
 0.35~0.45 0.30~0.50 1.40~1.60 1.80~2.00 0.15~0.25 / 0.03  0.05~
0.10
/
16x225x3000~4000mm 16x230x3000~4000mm 25x225x3000~4000mm 25x250x3000~4000mm
Grade AISI P20,Hot rolled , Black surface.normalizing
Chemical Composition
(For reference only)
C Si Mn Cr Mo Ni P≤ S≤ Others
0.28~0.40 0.20~0.80  0.60~1.00 1.40~2.00 0.30~0.55 / 0.03 0.03 /
46x160x1060 56x600x1130 56x610x940 80x610x1470
86x410x820 86x570x420 41x410x1100 46x410x1700
61x410x1410 100x410x1050
Grade Pre-hard NAK80,Hot rolled , Black surface.Q+T, 38~42HRC
41x250x340 46x300x435 46x310x1900 155x495x1430
Grade Pre-hard,738H,Hot rolled , Black surface.Q+T,23~37HRC
Chemical Composition
(For reference only)
C Si Mn Cr Mo Ni P≤ S≤ Others
0.35~0.45 0.20~0.40 1.30~1.60  1.80~2.10 0.15~0.25 0.90~1.20 0.035 0.035 /
135x655x1130 140x655x1040
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P20 tool steel stock list

P20 tool steel stock list,  any interested, pls contact to jack@otaisteel.com; 

Date: 2015-12-03

 Stock promotion List
Grade AISI P20,Hot rolled , Black surface.HRC 28-32
Chemical Composition
(For reference only)
C Si Mn Cr Mo Ni P≤ S≤ Others
0.28~0.40 0.20~0.80  0.60~1.00 1.40~2.00 0.30~0.55 / 0.03 0.03 /
13x520x2200 20x520x2200 25x540x2200 26x530x2200
31x750x2200 31x520x2200 35x480x2200 35x840x2200
36x750x2200 36x310x2200 360x430x2200 45x620x2200
45x420x2200 70x430x2200 76x630x2200
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China Steel market news-2015-11-20-Cold rolled steel price rising about USD 4.5 Per Ton

China Steel market news-2015-11-20

Shanghai market volume manufacture price move now, the anshan iron and steel resources generally rise 4.5 USD/ton, benxi steel posco resources fell USD 1.2/ton, clinch a deal the overall weak still. Throughout the entire market, cold-rolled resource is still in the relatively normal level, inventory pressure. Demand side, has entered the off-season, and money is tight, insufficient utilization industries such as cars, home appliances and shutdown phenomenon is relatively common, shrinking consumer demand for cold rolling, so as to make the inventory consumption is slow, sales businesses face high pressure. Entering late, means that a new round of order cycle, and merchants to steel mill order, will take cash price model, which to a large extent can aggravate the decline in the price.

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What is DF2 Steel?

1, What is DF2 steel?

DF2 steel is a quenching oil cold work tool steel. 

DF2 steel ‘s Chemical composition as below:

 

C Cr Mn W V
0.95 0.6 1.2 0.6 0.1
 

2,  Equivalent of DF2 steel

it is equivalent with AISI O1, GB 9CrWMn, JIS SKS3, DIN 100MnCrW4, W-Nr 1.2510 oil steel.

3, Delvery condition of DF2: 

① Soft annealed to max. 230 HB.

② Colour code:Colour code

4,Applications of DF2 steel

① For make Tool: BLANKING, CUTTING, FORMING AND OTHER APPLICATIONS

5, PHYSICAL PROPERTIES

When Hardened and tempered to 62 HRC. DF2 physical properties as below:

Temperature 20 C° 200°C 400°C
Density
kg/m³
7 850 7 750 7 700
Modulus of elasticity
MPa
190 000 185 000 170 000
Coefficient of
thermal expansion
 per °C from 20°C
12.6 x  10-6 13.1 x 10-6
Thermal conductivity
 W/m °C
32 33 34
Thermal conductivity
 W/m °C
460

 

6,Heat treatment of DF2 steel

① SOFT ANNEALING

Protect the steel and heat through to 780°C. Cool in the furnace at 15°C per hour to 650°C, then freely in air

② STRESS RELIEVING

After rough machining, the tool should be heated through to 650°C, holding time 2 hours. Cool slowly to 500°C, then freely in air.

③ HARDENING

Preheating temperature: 600 – 700°C Austenitising temperature: 790 – 850°C

④ QUENCHING MEDIA

in the Warm oil,about 80°C;

Martempering bath or fluidised bed at 180 – 225°C, then cooling in air;

Pls Note: On Temper the tool as soon as its temperature reaches 50 – 70°C.

7, Welding of DF2 Steel

Normal we do not advice make the welding for tool steel. but if needs. Must be take some proper precautions with regards to joint preparation, filler
material selection, pre-heating, welding procedure and postweld heat treatment to ensure good welding results. If the tool is to be polished or photo-etched, it is necessary to work with an electrode type of matching composition.

8, Equivalent material Chemical composition compare of DF2 steel

Grade NO. C Mn Cr W V
AIS O1 0.85~1.00 1.00~1.40 0.40~0.60 0.40~0.60 ≤0.30
WN-r 1.2510
/Din 100MnCrW4
0.90~1.05 1.00~1.20 0.50~0.70 0.50~0.70 0.05~0.15
JIS SKS 3 0.90~1.00 0.90~1.20 0.50~1.00 0.50~1.00
GB 9CrWmN 0.85~0.95 0.90~1.20 0.50~0.80 0.50~0.80

 

China Otai Special Steel is China special steel stockholders and suppliers. Otai Special Steel are suppliers of DF2 tool steel on steel round bar, diameters round bar and plate, and also can cut to your requirements products size and shape. and we also provide the steel surface machining, milling. bandsaw cutting, flame cut steel, Ground bar, plasma cutsteel, precision-ground-plate, Lumsden Ground Plate.

Contact us

If have any help and inquiry, pls feel free contact us by email or telphone or FAX.

Email (English): jack@otaisteel.com
Email (Español): jack@otaisteel.com

TEL: 0086-769-33232622

FAX: 0086-769-88705839

 

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About AISI 4340 steel is a Q+T alloy Structural steel usage | Application

About 4340 steel

AISI 4340 steel is a Q+T alloy Structural steel.

 

4340 is used for engineering structural,  Used as require good toughness, high strength, as well as the important conditioning of large size, heavy machinery such as high load of axial, turbine shaft, larger than 250 mm in diameter of helicopter rotor shaft, turbojet engine turbine shaft, blade, high load of transmission parts, fasteners of the crankshaft. Gear, etc.; Can also be used for operating temperature over 400 ℃ of rotor shaft and blade, etc.; And after nitriding processing can also be used to make. Any steel problem and enquiry, pls feel free contact us.

Email: jack@otaisteel.com
www.otaisteel.com

4340-steel

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