Project Description
Commitment to You
We are committed to integrate steel resources in china and serve the global steel market. We have 15+ years of experience in steel researching, production, managing and sales.
Our ability to purchase materials directly from leading mills will give you the competitive edge. Any Questions Just Call +86-731-89903933
AISI 444 is a low carbon, dual stabilised, molybdenum containing ferritic stainless steel with good ductility, toughness and resistance to sensitisation, even in the welds. With 18% chromium and 2% molybdenum, the steel has good pitting resistance and crevice corrosion resistance, similar to CS316 and good general corrosion resistance and oxidation resistance, similar to 316 in most environments. Being a ferritic stainless steel, AISI 444 is not susceptible to Stress Corrosion Cracking. Annealed AISI 444 is ductile and can be formed using a wide range of roll forming or mild stretch bending operations as well as the more common drawing and bending operations. AISI 444 does not harden excessively during cold working.
Characteristics
> Excellent resistance to chloride pitting and crevice corrosion cracking
> Immune to Chloride ion stress corrosion
> Maintains high strength at elevated temperatures
> Resistant to sea water, in both flowing and stagnant condition
>Heat resistant
Applications
> Marine engineering
> Furnaces a gas turbines
>Chemical processing plants
> Boiler a pressure vessels
> Nuclear power plants
Equivalent
Euronorm | Nom. | AISI / ASTM / UNS |
1.4521 | X2CrMoTi18-2 | 444 |
Chemical Composition
Type | C | Mn | Si | P | S | Cr | Mo | Ni | Nb | Ti |
444 | 0.025 max | 1.00 max | 1.00 max | 0.040 max | 0.030 max | 71.5-19.50 | 1.75-2.50 | 1 | 1 | 0.20+4(C+N) 0.80 |
Mechanical Properties
Type | Product Form | 0.2% Proof Stress (Mpa) | Tenstile Strength (Mpa) | Elongation (%) | Brinell Hardness |
444 | C | 275 min | 415 min | 20 min | 217 |
Delivery Condition
Stress Relieved Annealed
Bright Annealed
Normalized
Solution Treatment
Sizes
Hot Rolled Process – OD 30-500mm ; WT 3-60mm ; L 6-12meter
Cold Drawn Process – OD 10-200mm ; WT 0.5-20mm ; L 1-12meter
Cold Rolled Process – OD 6-200mm ; WT 0.1-20mm ; L 1-12meter
Surface
Acid pickling – pre-passivation process of treating stainless steel parts with an acid solution, typically hydrochloric or sulfuric acid, which can remove oxide scale and heat tint while dissolving steel flecks embedded in the part.
Polishing – P grade sandpaper: P150, P200, P250, P300, P400, P500, P600, P700, P800
Inspection
Chamical analysis / Tensile test at room temperature / flattening test / ring tensile test / drift expemdomg test / ring expanding test / leak tightness test / Tensile test at elevated temperature / impact test at room temperature / impact test at low temperature / eddy current test / ultrasonic test / magnetic flux leakage test
CORROSION RESISTANCE
Type 444 provides excellent corrosion resistance in moderately severe environments of many types that include chlorides and organic acids found in foods and beverages. It also provides satisfactory resistance to dilute sulfuric acid solutions and to highly concentrated sodium hydroxide.
FORMABILITY
Type 444 provides excellent formability and can be readily deep drawn and spin formed. Stretch forming, however, is limited in application for this material.
WELDABILITY
The ferritic class of stainless steels is generally considered to be weldable by the common fusion and resistance techniques.
Experienced 15+ Years
Our ability to purchase materials directly from leading mills at the best possible price will give you the competitive edge. This coupled with a skilled workforce dedicated to embracing the demands of the markets.
We Can Supply Follows Products with High Quality:
- Cold Rolled Steel Tube
- Cold Drawn Steel Tube
- Hollow Bar
- Honed Tube
- Plated Tube
- Plated Bar
- Boiler Tube
All Products According Quality Standard Strictly:
- ASTM: ASTM A519, ASTM A513.
- JIS:JIS G3441, JIS G3445, JIS G3466, JIS G3459.
- DIN: DIN1626, DIN1629, DIN2391, DIN2393, DIN2448, DIN2458.
- EN: EN10305.
- BS: BS6323.
Wide Range of Pipes to Fit Your Industry:
- OD from 5mm to 820mm.
- Wall Thickness from 0.1 to 100mm.
- Length up to 50mtr per pc.
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Direct from the Source and Deliver to You in a Very Fast and Efficient Timeframe.