OEM/ODM Manufacturer AISI304| SUS304| EN1.4948 Manufacturer in Dominica

OEM/ODM Manufacturer
 AISI304| SUS304| EN1.4948 Manufacturer in Dominica

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Chemical Composition of Stainless Steel 304 Table 1. Chemical composition for 304 stainless steel alloys % 304 304L 304H C 0.0 – 0.07 0.0 – 0.03 0.04 – 0.08 Mn 0.0 – 2.0 0.0 – 2.00 0.0 – 2.0 Si 0.0 – 1.00 0.0 – 1.00 0.0 – 1.0 P 0.0 – 0.05 0.0 – 0.05 0.0 – 0.04 S 0.0 – 0.03 0.0 – 0.02 0.0 – 0.02 Cr 17.50 – 19.50 17.50 – 19.50 ...


  • Length: 3-5.8mm or Customization
  • Surface: black, peeled, or rough turned
  • Heat treatment: air-cooling, normalized, annealed, Q&T
  • Smelting process: EAF+LF+VD
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    Chemical Composition of Stainless Steel 304

    Table 1. Chemical composition for 304 stainless steel alloys

    %

    304

    304L

    304H

    C

    0.0 – 0.07

    0.0 – 0.03

    0.04 – 0.08

    Mn

    0.0 – 2.0

    0.0 – 2.00

    0.0 – 2.0

    Si

    0.0 – 1.00

    0.0 – 1.00

    0.0 – 1.0

    P

    0.0 – 0.05

    0.0 – 0.05

    0.0 – 0.04

    S

    0.0 – 0.03

    0.0 – 0.02

    0.0 – 0.02

    Cr

    17.50 – 19.50

    17.50 – 19.50

    17.00 – 19.00

    Ni

    8.00 – 10.50

    8.00 – 10.50

    8.00 – 11.00

    Fe

    Balance

    Balance

    Balance

    N

    0.0-0.11

    0.0-0.11

    0.0 – 0.10

    Properties of Stainless Steel 304

    Mechanical Properties of Stainless Steel 304

    Table 2a. Mechanical properties for 304 stainless steel alloys – sheet up to 8 mm thick

    Grade

    304

    304L

    304H

    Tensile Strength (MPa)

    540 – 750

    520 – 700

    -

    Proof Stress (MPa)

    230 Min

    220 Min

    -

    Elongation A50 mm

    45 Min %

    45 Min %

    -


    Table 2b. Mechanical properties for 304 stainless steel alloys – plate from 8 – 75 mm thick

    Grade

    304

    304L

    304H

    Tensile Strength (MPa)

    520 – 720

    500 – 700

    -

    Proof Stress (MPa)

    210 Min

    200 Min

    -

    Elongation A5

    45 Min %

    45 Min %

    -


    Table 2c. Mechanical properties for 304 stainless steel alloys – bar and section up to 160 mm diameter / thickness

    Grade

    304

    304L

    304H

    Tensile Strength (MPa)

    500 – 700

    500 – 700

    500 – 700

    Proof Stress (MPa)

    190

    175 Min

    185 Min

    Elongation A50 mm

    45 Min %

    45 Min %

    40 Min %

    Hardness Brinell

    215 Max HB

    215 Max HB

    -

    Physical Properties of Stainless Steel 304

    Table 3. Physical properties for 304 stainless steel alloys

    Property

    Value

    Density

    8.00 g/cm3

    Melting Point

    1450 °C

    Modulus of Elasticity

    193 GPa

    Electrical Resistivity

    0.072 x 10-6 Ω.m

    Thermal Conductivity

    16.2 W/m.K

    Thermal Expansion

    17.2 x 10-6 /K

    Alloy Designations

    Stainless steel 304 also corresponds to the following standard designations and specifications:

    Euronorm

    UNS

    BS

    En

    Grade

    1.4301

    S30400

    304S15

    304S16

    304S31

    58E

    304

    1.4306

    S30403

    304S11

    -

    304L

    1.4307

    -

    304S11

    -

    304L

    1.4311

    -

    304S11

    -

    304L

    1.4948

    S30409

    304S51

    -

    304H

    Corrosion Resistance of Stainless Steel 304

    Stainless steel 304
    has excellent corrosion resistance in a wide variety of environments
    and when in contact with different corrosive media. Pitting and crevice
    corrosion can occur in environments containing chlorides. Stress
    corrosion cracking can occur at temperatures over 60°C.

    Heat Resistance of Stainless Steel 304

    Stainless steel 304 has
    good resistance to oxidation in intermittent service up to 870°C and in
    continuous service to 925°C. However, continuous use at 425-860°C is
    not recommended if corrosion resistance in water is required. In this
    instance 304L is recommended due to its resistance to carbide
    precipitation.

    Where high strength is required at temperatures above 500°C and up to
    800°C, grade 304H is recommended. This material will retain aqueous
    corrosion resistance.

    Fabrication of Stainless Steel 304

    Fabrication of all stainless steels should
    be done only with tools dedicated to stainless steel materials. Tooling
    and work surfaces must be thoroughly cleaned before use. These
    precautions are necessary to avoid cross contamination of stainless steel by easily corroded metals that may discolour the surface of the fabricated product.

    Cold Working of Stainless Steel 304

    Stainless steel 304 readily
    work hardens. Fabrication methods involving cold working may require an
    intermediate annealing stage to alleviate work hardening and avoid
    tearing or cracking. At the completion of fabrication a full annealing
    operation should be employed to reduce internal stresses and optimise
    corrosion resistance.

    Hot Working of Stainless Steel 304

    Fabrication methods, like forging, that involve hot working should
    occur after uniform heating to 1149-1260°C. The fabricated components
    should then be rapidly cooled to ensure maximum corrosion resistance.

    Heat Treatment of Stainless Steel 304

    Stainless steel 304 cannot be hardened by heat treatment.

    Solution treatment or annealing can be done by rapid cooling after heating to 1010-1120°C.

    Machinability

    Stainless steel 304 has good machinability. Machining can be enhanced by using the following rules:

    • Cutting edges must be kept sharp. Dull edges cause excess work hardening.

    • Cuts should be light but deep enough to prevent work hardening by riding on the surface of the material.

    • Chip breakers should be employed to assist in ensuring swarf remains clear of the work

    • Low thermal conductivity of austenitic alloys results in heat
      concentrating at the cutting edges. This means coolants and lubricants
      are necessary and must be used in large quantities.

    Welding of Stainless Steel 304

    Fusion welding performance for Stainless steel 304 is excellent both with and without fillers. Recommended filler rods and electrodes for stainless steel 304 is grade 308 stainless steel.
    For 304L the recommended filler is 308L. Heavy welded sections may
    require post-weld annealing. This step is not required for 304L. Grade
    321 may be used if post-weld heat treatment is not possible.

    Applications of Stainless Steel 304

    Stainless steel 304 is typically used in:

    • Sinks and splashbacks

    • Saucepans

    • Cutlery and flatware

    • Architectural panelling

    • Sanitaryware and troughs

    • Tubing

    • Brewery, dairy, food and pharmaceutical production equipment

    • Springs, nuts, bolts and screws

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  • Friday Sermon delivered by Hadhrat Mirza Masroor Ahmad, Head of the Ahmadiyya Muslim Community.
    Recorded on 28th October 2016.

    By grace of Allah, the trend to dedicate children in the Jama’at is rising. I receive letters from parents daily. On certain days, the count reaches twenty to twenty-five. In them, the parents request their yet to be born children to be included in Waqfe Nau. When Hazrat Khalifatul Masih IV(ra) started this movement, it was not permanent, but later, he made it permanent. And Jama’at, especially mothers in every country, said, “Here we are!” Twelve or thirteen years ago, due to Jama’at’s attention to this, the number of Waqfeene Nau was over 28 thousand. By grace of Allah this number has now neared 61 thousand. So, I want to convey to all such mothers and fathers that just the name of Waqfe Nau is not enough. Rather, Waqfe Nau is an important responsibility. It is the responsibility of the parents until Waqfe Nau becomes an adult and thereafter it becomes his own responsibility. Some boys and girls, who have got secular education, apparently show great enthusiasm and present their services. Later on, leave because they cannot survive with the allowance that the Jama’at pays them. When a larger objective is to be achieved, you have to sacrifice and bear hardship. Briefly, I want to draw the attention toward certain administrative matters and the line of action of Waqfeene Nau as well. Some people raise questions and some Waqfeene Nau have certain misconceptions in their minds that by joining Waqfe Nau they have got a new identity. No doubt the identity is made, but with that identity they will not receive an extraordinarily preferential treatment. Instead, they will have to raise their bars of sacrifice with that identity. Some people infuse into the minds of their Waqfeene Nau children that they are very special children. At the time of matrimonial match, if they look for faith rather than worldly material, and then get along with their relationships, and can say that while acting upon the religious directions they are the ones who carry on with their relationships. Then they will be called special. They are special if are more forbearing than others and in case of altercation and disorder, they not only refrain from them but become peacemakers. If, in the field of propagation, they take the lead position to fulfill this duty, then they are special. I want to tell the parents that no matter how much training they impart verbally, it will ineffective until their words and actions do not conform to that. The parents will have to model their praying conditions. They will have to establish the patterns of reciting and teaching of the Holy Quran. They will have to become a role model of high morals. They themselves will have to turn to acquiring religious knowledge. High standards of hating falsehood will have to be founded. Despite harm done to some by some office bearer, they will have to refrain from talking in their homes, against the Jama’at system or the office bearers.

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