Forging
Forging is a manufacturing process that involves shaping metal through the application of force.
What are Stainless Steel 304 / 304L / 304H Forged Fittings?
Stainless Steel 304 /
304L / 304H Forged Fittings are components made from alloy grade 304,
which is a popular austenitic stainless steel. These fittings are produced through a forging
process that involves shaping and compressing the steel under high pressure, resulting in
strong and durable fittings suitable for various applications.
What is the difference between Stainless Steel 304, 304L, and 304H?
Stainless Steel 304 is a versatile alloy with excellent corrosion resistance and high
strength. The "L" in 304L stands for low carbon content, making it more resistant to
sensitization and preventing carbide precipitation during welding. On the other hand, 304H
contains a higher carbon content, which provides improved high-temperature strength.
Table Of Content
What are the common types of Stainless Steel 304L Forged Fittings?
The most common types of Stainless Steel 304 / 304L / 304H Forged Fittings
include threaded fittings (such as elbows, tees, couplings, and unions) and socket
weld fittings (including caps, plugs, reducers, and crosses). These fittings come in various
shapes, sizes, and pressure ratings to accommodate different piping systems.
What are the advantages of Stainless Steel 304 / 304L / 304H Forged Fittings?
Stainless Steel 304 / 304L / 304H Forged Fittings offer several advantages, including:
• Excellent corrosion resistance in a wide range of environments.
• High strength and durability.
• Good formability and weldability.
• Resistance to oxidation and scaling at high temperatures.
• Suitable for use in both high and low-temperature applications.
• Versatility in various industrial sectors, including chemical, petrochemical, food
processing, and more.
What applications are Stainless Steel 304H Forged Fittings commonly used for?
Stainless Steel 304H Forged Fittings find applications in numerous
industries, such as Oil and gas exploration and production, Chemical and petrochemical
processing, Food and beverage processing, Pharmaceutical and biotechnology sectors, Pulp and
paper industries, Power generation plants, Water treatment facilities HVAC (Heating,
Ventilation, and Air Conditioning) systems.
What are the temperature limitations of Stainless Steel 304 Forged Fittings?
Stainless Steel 304 Forged Fittings can withstand temperatures up to 870°C (1600°F) for
intermittent service and up to 925°C (1700°F) for continuous service. However, prolonged
exposure to high temperatures can lead to carbide precipitation and reduced corrosion
resistance. In such cases, using 304H fittings with higher carbon content may be more
suitable.
| Specifications | ASTM A182 / ASME SA182 |
| Standard | ASME 16.11, MSS SP-79, 83, 95, 97, BS 3799 |
| Size | 1/8” NB to 4” NB (Socketweld & Screwed-Threaded) |
| Class | 2000 LBS, 3000 LBS, 6000 LBS, 9000 LBS |
| Type | Socketweld Fittings, Screwed-Threaded Fittings |
| Manufacturing process | Forge, Cast, Push, Press, etc. |
| Test Certificates | EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc |
| Specialized manufacturer of | 90 Deg Forged Elbows, 45 Deg Forged Elbow, Tee, Cross, Coupling, End Cap, Union, Bushing, Plug, Barrel Nipple |
| USA | France | North America | Germany | Germany | Italy | Japan | Russia | Spain | Sweden | UK | European Union |
| AISI | AFNOR | UNS | DIN 17006 | W.N. 17007 | UNI | JIS | GOST | UNE | SIS | BSI | EURONORM |
| 304 | Z 6 CN 18-09 | S30400 | X 5 CrNi 18 10 X 5 CrNi 18 12 | 1.4301 | X 5 CrNi 1810 | SUS 304 | 08KH18N10 06KH18N11 | X 6 CrNi 19-10 | 23 32 | 304S15 304S16 | X 6 CrNi 18 10 |
| 304L | Z 2 CN 18-10 | S30403 | X 2 CrNi 18 11 | 1.4306 | X 2 CrNi 1911 | SUS 304L | 03KH18N11 | X 2 CrNi 19-10 | 23 52 | 304S11 | X 3 CrNi 18 10 |
| 304H | - | S30409 | - | 1.4948 | X 8 CrNi 1910 | SUS F 304H | - | X 6 CrNi 19-10 | - | - | - |
| Grade | C | N | Si | P | S | Cr | Mn | Ni | Fe |
| 304 | 0.08 max | 0.10 max | 0.75 max | 0.045 max | 0.030 max | 18.0 - 20.0 | 2.0 max | 8.0 - 10.5 | Remainder |
| 304L | 0.03 max | 0.10 max | 0.75 max | 0.045 max | 0.030 max | 18.0 - 20.0 | 2.0 max | 8.0 - 12.0 | Remainder |
| 304H | 0.04 - 0.10 | 0.10 max | 0.75 max | 0.045 max | 0.030 max | 18.0 - 20.0 | 2.0 max | 8.0 - 10.5 | Remainder |
| Grade | Tensile Strength (ksi) | 0.2% Yield Strength (ksi) | Elongation% in 2 inches |
| 304 | 75 | 30 | 40 |
| 304L | 70 | 25 | 40 |
| 304H | 75 | 30 | 40 |
| Properties | Units | Temperature in °C |
| Density | 8.03 g/cm³ | Room |
| Specific Heat | 0.12 Kcal/kg.C | 22° |
| Melting Range | 1399 - 1454 °C | - |
| Modulus of Elasticity | 193 KN/mm² | 22° |
| Electrical Resistivity | 72 µΩ.cm | Room |
| Coefficient of Expansion | 16.9 µm/m °C | 20 - 100° |
| Thermal Conductivity | 16.2 W/m -°K | 20° |
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