304L 321 321H 904L Bright Polished Round Stainless Steel Rods Hot Rolled , ASTM Standard

304L 321 321H 904L Bright Polished Round Stainless Steel Rods Hot Rolled , ASTM Standard

Quick Detail:

StandardJIS,AISI,ASTM,GB,DIN,EN,SUS,ASME
Model NO.:904L
Diameter: 3.0mm-550mm
Length: 4000mm-7000mm, or as your order.
SurfaceBlack,Peeled,Polishing,Bright,Sand Blast,Hair Line
Certification:ISO,SGS,BV,DNV,LR
Perforated or Not:Not Perforated
Technique:Hot Rolled
Export Markets:North America, South America, Southeast Asia, Africa, Eastern Asia, Western Europe

Description:

1. Product Item No:008Rod-Cosco Steel

2. Standard: AISI, ASTM, EN, JIS, DIN, GB

3. Material: 201, 202, 301, 302, 304, 304L, 321, 321H, 316, 316L, 317, 317L, 309S, 310S, 347, 347H, 410, 420, 430, 904 etc

4. Diameter: 3.0mm-550mm

5. Length: 4000mm-7000mm, or as your order.

6. Quality: NO. 1

7. Surface: Black/Polished/Bright

8. Shipment: Within 15-20 working days after receipt of the down payment or Irrevocable L/C sight.

9. Certificate: ISO, SGS, and third part inspection.

10. Capacity: 500 metric tons per month.
    

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

Our advantage

1. Competitive price with good quality
2. Soonest delivery days
3. Good quality control system
4. Good after sales services
5. Good package