Ductile Manhole Cover is made of ductile;
we make the manhole cover on BS EN124, Mainly our products are A15, B125, C250
and D400, sometimes also make it E600 and F900 in case of need. For A15, B125,
C250 and D400 ductile manhole covers to be used in Green belt, Pavement, Auxiliary
road, Main road and Express way. We make ductile manhole covers all by
producing line, the quality is very good, and we warmly welcome customers all
over the world to do business with us.
Ductile Manhole Cover,Ductile Iron Manhole Cover,Ductile Iron Cover And Frame,Ductile Iron Cover Zhoushan Runchun Import & Export Co., Ltd. , https://www.en124casting.com
Grade 440C stainless steel is a high carbon martensitic stainless steel. It has high strength, moderate corrosion resistance, and good hardness and wear resistance. Grade 440C is capable of attaining, after heat treatment, the highest strength, hardness and wear resistance of all the stainless alloys. Its very high carbon content is responsible for these characteristics, which make 440C particularly suited to such applications as ball bearings and valve parts.
Corrosion Resistance:
*Good resistance to the atmosphere, fresh water, foods, alkalies and mild acids. Best resistance in the hardened and tempered and passivated condition. A smooth polished surface also assists.
*The corrosion resistance of grade 440C approximates that of grade 304 in many environments.
Heat Resistance:
*Not recommended for use in temperatures above the relevant tempering temperature, because of reduction in mechanical properties by over-tempering.
Heat Treatment:
*Annealing - Full anneal - 850-900°C, slow furnace cool to about 600°C and then air cool. Sub-critical Annealing - 735-785°C and slow furnace cool.
H*ardening - Heat to 1010-1065°C, followed by quenching in warm oil or air. Oil quenching is necessary for heavy sections. Immediately temper at 150-370°C to obtain a wide variety of hardness values and mechanical properties as indicated in the accompanying table.
*Tempering in the range 425-565°C is to be avoided because of reduced impact resistance and corrosion resistance. Tempering in the range 590-675°C results in lower hardness (the product become machinable) and high impact resistance.
Welding:
*If welding is necessary pre-heat at 250°C and follow welding with a full anneal. Grade 420 filler will give a high hardness weld (although not as high as the 440C), but 309 or 310 will produce soft welds with higher ductility.
Machining:
*In the annealed condition this grade is relatively easily machined; approximately the same as for high speed steel. Chips are tough and stringy so chip breakers are important. If these grades are hardened machining becomes more difficult and probably impossible.
Other Grades:
201,202,21-4N,301,302,301L,303,303Se,304,304L,304H,304LN,304N,305,S38400,308,309,309S,310,310s,
316,316L,316H,316Ti,316N,316LN,317,317L,317LMN,317LN,321,321H,347,347H,S3100,S31803,S3205,
S32304,S31200,S31260,S32507,405,409,429,430,430F,434,444,403,410S,410,416,420,420F,431F,440A
440B,440C,440F,610,630,631,632,635,660,Alloy 200,Monel 400 ,Alloy K-500 ,Inconel 600 , Incconel 601,
Inconel 625 , Inconel 718 , Alloy 800 ,Alloy 800H,Alloy 800HT,Inconel 825,Alloy 276, Alloy 20, Alloy 59
2:Chemical Composition with different standards:
Tianjin Zhongyantiancheng Steel Co.,Ltd
Commodity
Stainless Steel Plate/Stainless Steel Sheet
Material
440C
Standard
GB
 JIS
ASTM/ASME
DIN
9Cr18/11Cr17
SUS 440C
440C
1.4125
Chemical Composition
C
Mn
P
S
0.95-1.20
≤1.00
≤0.040
≤0.03
Si
Cr
Mo
Â
≤1.00
16.0-18.0
≤0.75
Â
Thickness
0.3mm--16mm(cold rolled) 3mm--280mm(hot rolled)
Width
1000mm--2200mm
Length
1000mm-6000mm, as customers' request
Surface
BA/2B/NO.1/NO.3/NO.4/8K/HL/2D/1D
manufacture
Hot Rolled/Cold Rolled
Packing
Packed in bundles with standard export sea-worthy package
Delivery Time
Within 15 working days, according to customers' quantities
Quality
High Quality.SGS inspection is accepted if needed
Place of Origin
Tianjin
Productivity
500 MT/Month
Payment
T/T,L/C
MOQ
1 MT
Application
 High quality knife blades,Surgical instruments,Valve seats,Chisels
Note
We can also do other materials
3:Stainless Steel Plate Process:
4:Stainless Steel Plate Package:
5:About us:
Tianjin Zhongyantiancheng Steel Co.,Ltd(short for ZYTC ) is a professional manufacturer and exporter of steel products in China, located in Tianjin Beichen District, having the biggest port in North China.
With 20 years of development, the group has become the leader in steel, product variety, complete specifications and so on in North China market, large inventories more than 100,000 tons are maintained all the time.
ZYTC is specialized in steel products, especially Stainless steel pipe,Stainless steel bar,Stainless steel plate (TG,KSK,BG,Krupp), Round bar(SHOUGANG,DAYE), Spiral pipe(LIDA), Aluminum steel plate,Aluminum pipe ,Copper and so on .Â
ZYTC has cooperated with Tianjin Seamless Steel Tube Plant(TPCO), Baotou Steel Pipe Plant, Chengdu Steel Pipe Plant, Anshan Steel Pipe Plant,Baoshan Steel Pipe Plant and other steel pipe plants.Round bar cooperated with Beijing shougang goup,Tonggang steel group, Daye steel bar group ,Benxi bengang group an so on , Baotai titanium group,Baoji Lixing group,Stainless steel plate cooperated with Shanxi TAIGANG Steel Plate grouop,Baogang group,Shanghai Kelubo group ,and Puxiang steel group. all these corporations mentioned above are our shareholder partners.Â
ZYTC principle is: supplying the best products and service,being the best supplier.
The company can make steel product according to particular specifications and materials. ZYTC will perfect our quality management system and supply products of high quality to our customers.
We are all looking forward to establishing business relationships with customers all over the world!
6:Why choose us?
* More than 20 years experience in stainless and aluminum steel fields.
* Samples available.
* Specialist metallurgic advice and flexible service.
* High level of expertise, in-depth product knowledge.
* Competitive price, high quality,rich experiences and high reputation
* Delivered on time.
* Good after-sale service.
* Well recognized and trusted by customers.
7: Other productions:
Hot Rolled 440c Stainless Steel Plate for Making Knife
Model NO.: 440C 440A 440B
Thickness: 0.3mm to 280mm
Width: 1000mm to 2200mm
Length: Cut as Requirement
Mtc: En 10204/3.1
Surface: 2b, No.1, 1d, 2D, Hl, 8k, Ba, Sb
Edge: Mill Edge or Slit Edge
Trademark: TISCO, LISCO, ZPSS, KRUPP
Transport Package: as Customer′s Requirement
Origin: China
HS Code: 72192300
1:Brief Introduction Of 440C stainless steel: