Clean Stock 904L Stainless Steel Pipe of Bottom Price Buy Now

Type: Seamless Material: Stainless Steel Usage: Pipeline Transport, Boiler Pipe, Oil/Gas Drilling, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose Trademark: Bao Steel Specification: diameter 10 to 200mm HS Code: 7304419000 Technique: Cold Rolled Surface Treatment: Polished Section Shape: Round Transport Package: Fumigated Wooden Box Origin: China Clean Stock 904L Stainless Steel Pipe of Bottom Price Buy Now Product Description

Introduction

904L is a non-stabilised low carbon high alloy austenitic stainless steel. The addition of copper to this grade gives it greatly improved resistance to strong reducing acids, particularly sulphuric acid. It is also highly resistant to chloride attack - both pitting / crevice corrosion and stress corrosion cracking. This grade is non-magnetic in all conditions and has excellent weldability and formability. The austenitic structure also gives this grade excellent toughness, even down to cryogenic temperatures. 904L does have very substantial contents of the high cost ingredients nickel and molybdenum. Many of the applications in which this grade has previously performed well can now be fulfilled at lower cost by duplex stainless steel 2205 (S31803 or S32205), so it is used less commonly than in the past. Key Properties These properties are specified for flat rolled product (plate, sheet and coil) in ASTM B625. Similar but not necessarily identical properties are specified for other products such as pipe, tube and bar in their respective specifications.

  Composition Table 1. Composition ranges for 904L grade of stainless steels.

Grade		C	Mn	Si	P	S	Cr	Mo	Ni	Cu
904L	min. max.	- 0.020	- 2.00	- 1.00	- 0.045	- 0.035	19.0 23.0	4.0 5.0	23.0 28.0	1.0 2.0

Mechanical Properties Table 2. Mechanical properties of 904L grade stainless steels.

Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Hardness
				Rockwell B (HR B)	Brinell (HB)
904L	490	220	35	70-90 typical	-
Rockwell Hardness value range is typical only; other values are specified limits.

Physical Properties Table 3. Typical physical properties for 904L grade stainless steels.

Grade	Density (kg/m3)	Elastic Modulus (GPa)	Mean Co-eff of Thermal Expansion (µm/m/°C)			Thermal Conductivity (W/m.K)		Specific Heat 0-100°C (J/kg.K)	Elec Resistivity (nΩ.m)
			0-100°C	0-315°C	0-538°C	At 20°C	At 500°C
904L	8000	200	15	-	-	13	-	500	850

Grade Specification Comparison Table 4. Grade specifications for 904L grade stainless steels.

Grade	UNS No	Old British		Euronorm		Swedish SS	Japanese JIS
		BS	En	No	Name
904L	N08904	904S13	-	1.4539	X1NiCrMoCuN25-20-5	2562	-
These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted.

Possible Alternative Grades Table 5. Possible alternative grades to 904L stainless steel.

Grade	Why it might be chosen instead of 904L
316L	A lower cost alternative, but with much lower corrosion resistance.
6Mo	A higher resistance to pitting and crevice corrosion resistance is needed.
2205	A very similar corrosion resistance, with the 2205 having higher mechanical strength, and at a lower cost to 904L. (2205 not suitable for temperatures above 300°C.)
Super duplex	Higher corrosion resistance is needed, together with a higher strength than 904L.

Corrosion Resistance Although originally developed for its resistance to sulphuric acid it also has a very high resistance to a wide range of environments. A PRE of 35 indicates that the material has good resistance to warm sea water and other high chloride environments. High nickel content results in a much better resistance to stress corrosion cracking than the standard austenitic grades. Copper adds resistance to sulphuric and other reducing acids, particularly in the very aggressive "mid concentration" range. In most environments 904L has a corrosion performance intermediate between the standard austenitic grade 316L and the very highly alloyed 6% molybdenum and similar "super austenitic" grades. In aggressive nitric acid 904L has less resistance than molybdenum-free grades such as 304L and 310L. For maximum stress corrosion cracking resistance in critical environments the steel should be solution treated after cold work. Heat Resistance Good resistance to oxidation, but like other highly alloyed grades suffers from structural instability (precipitation of brittle phases such as sigma) at elevated temperatures. 904L should not be used above about 400°C. Heat Treatment Solution Treatment (Annealing) - heat to 1090-1175°C and cool rapidly. This grade cannot be hardened by thermal treatment. Welding 904L can be successfully welded by all standard methods. Care needs to be taken as this grade solidifies fully austenitic, so is susceptible to hot cracking, particularly in constrained weldments. No pre-heat should be used and in most cases post weld heat treatment is also not required. AS 1554.6 pre-qualifies Grade 904L rods and electrodes for welding of 904L. Fabrication 904L is a high purity, low sulphur grade, and as such will not machine well. Despite this the grade can be machined using standard techniques. Bending to a small radius is readily carried out. In most cases this is performed cold. Subsequent annealing is generally not required, although it should be considered if the fabrication is to be used in an environment where severe stress corrosion cracking conditions are anticipated. Applications Typical applications include: •         Processing plant for sulphuric, phosphoric and acetic acids •         Pulp and paper processing •         Components in gas scrubbing plants •         Seawater cooling equipment •         Oil refinery components •         Wires in electrostatic precipitators

Packaging & Shipping

PackagingDetails:	Products are well packed and clear labeled according to the regulations and customer's requests.
Delivery Detail:	7-15days after receiving deposit

Our Services 1.Our Service For You Pre-sale Service 1. Sample can be offered with sample charge and courier fee by buyer's side. 2. We have full stock,and can deliver within short time.Many styles  for your choices.  3. OEM and ODM order are accepted, Any kind of logo printing or design are available. 4. Good Quality + Factory Price + Quick Response + Reliable Service, is what we are trying best to offer you 5. All of our products are produce by our professional workman and we have our high-work-effect foreign trade team, you can totally believe our service.   6. We have 8 year experience of design, manufacture and sell lingerie, we cherish every order from our honor.  After you choose 1. We will count cheapest shipping cost and make invoice to you at once. 2. Check quality again, then send out to you at 1-2 working day after your payment, 3. Email you the tracking no, and help to chase the parcels until it arrive you. After-sale choose 1. We are very glad that customer give us some suggestion for price and products. 2. If any question,please contact with us freely by E-mail or Telephone. Photo for factory   FAQ  1. If we travel to China to checking your facility, are you welcome? Of course, why not? we will provide the whole accompany from you landing in China.  Only Give us a call before your arrive.   We will pick up you from the airport, living in our company's hotel, and driving by car take you visiting our company. Warm Welcome!   2. How many sales person in your team? present 8 sales, but more hands help in work, total team is 20+ workers. So do not worry, not the one person company.   3. How Many Years of your company working in this industry? We are 20+ years, from last century. Expanding the market, and cultivate our techniques, two ways all in work together.   4. Could you show me some photos of your producing working? here, following is our working plant, all is same when you come to China to audit.  Contact us Name:Lucy Cui Phone:021-67896311

 

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