EN 1.4304 Stainless Steel Sheet

Gnee Steel (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of en 1.4304 stainless steel sheet in China. With abundant experience, we warmly welcome you to wholesale customized en 1.4304 stainless steel sheet from our factory. For price consultation, contact us.

1.4304 stainless steel plate, also known as 304H stainless steel plate, is an austenitic stainless steel with good corrosion resistance, processing and welding performance, high strength and hardness, and is widely used in kitchenware and medical equipment. Forging temperature 1000-1200°C, deformation 20%-40%, moderate speed, cooling required. Meets multinational standards and various forms.
The 1.4304 stainless steel cold-rolled plate supplied by GNEE meets international standards such as ASTM/ASME in the United States, DIN in Germany, and JIS in Japan. In addition, 1.4304 stainless steel products are also provided in the form of strips, bars, pipes, wires, forgings, polished bars and matching welding materials, and flange parts and standard parts can be processed according to drawings.

1.4304 polished steel plate

Specifications of 1.4304 Stainless Steel Bright Annealed Plate

Why Choose GNEE

GNEE products are certified by internationally renowned certification bodies such as ISO9001, TS16949, BV, SGS, etc. They are widely used in various fields and have been in service for more than 18 years. Customers are spread across Africa, Europe, the United States, etc.

Stainless Steel Hot Rolled Plate Suppliers

Stainless steel sheet packing

FAQ:

Q1: Which standard grade does EN 1.4304 correspond to?
1.4304 is not an official designation in EN 10088-2; in the market, it generally refers to 304H (UNS S30409)-containing 0.04–0.10% C, 18–20% Cr, and 8–11% Ni-and is used for high-temperature structural components operating at 800–900°C.

Q2: What is the difference between 1.4304 and 1.4301 (304)?
1.4301 corresponds to 304 (C ≤ 0.08%), whereas 1.4304 generally refers to 304H (C 0.04–0.10%, with a specified minimum carbon content). The higher carbon content promotes carbide precipitation that pins grain boundaries, resulting in an approximately 30% increase in creep strength at 650°C.

Q3: What is the chemical composition of 1.4304 steel plate?
Cr 18–20%, Ni 8–11%, C 0.04–0.10%, Mn ≤ 2.0%, Si ≤ 1.0%, P ≤ 0.045%, S ≤ 0.03%, with the balance being Fe. PREN ≈ 19–21; the PREN value is lower than that of 316 (≈ 25–28).

Q4: What are the mechanical properties of 1.4304 steel plate?
In the solution-annealed state: UTS ≥ 515 MPa, YS ≥ 205 MPa, elongation ≥ 40%, and hardness ≤ 217 HBW. After cold working, UTS can reach 700–900 MPa, while elongation drops to 20–30%.

Q5: What is the maximum service temperature for 1.4304 steel plate?
The upper limit for continuous service is 900–950°C (1650–1740°F). Above 950°C, sigma (σ) phase precipitation accelerates, and both creep strength and corrosion resistance decline; switching to 310H or Inconel 625 is required.

Q6: What are the available specifications/dimensions for 1.4304 steel plate?
Cold-rolled: 0.3–6.0 mm × 610–1524 mm, 2B/BA finish; Hot-rolled: 6.0–30 mm × 1500–2500 mm. Lengths range from 2440–6100 mm; cut-to-length service is available; thickness tolerance is ±0.05 mm.

Q7: What is the corrosion resistance of 1.4304 steel plate?
PREN ≈ 19–21; excellent performance in atmospheric and freshwater environments. There is a significant risk of pitting corrosion in environments with Cl⁻ > 200 ppm or in the presence of reducing acids (HCl, H₂SO₄); upgrading to 316L (PREN ≈ 25–28) or 904L is recommended.

Q8: Is heat treatment required after welding 1.4304 steel plate?
No. With a carbon content (C) ≤ 0.10% and an austenitic microstructure, solution treatment after welding is unnecessary. Recommended filler wires include ER308L or ER347; GTAW (TIG) welding is suitable, maintaining an interpass temperature below 150°C.

Q9: What operating conditions are suitable for 1.4304 steel plate?
Applications involving sustained mechanical loads, such as power plant boiler superheater panels (600–900°C), chemical reactor liners (high-temperature), automotive exhaust manifolds (400–700°C), expansion joints and bellows, and high-temperature sections of HVAC systems.

Q10: What tests are performed on each batch of 1.4304 steel plate? Spectrochemical analysis (confirming C 0.04–0.10%), tensile test (UTS ≥ 515 MPa), 180° bend test (no cracking), hydrostatic test, eddy current test, hardness ≤ 217 HBW, grain size ≥ Grade 5. Supplied with EN 10204 3.1 MTC; PMI and TPI available as options.

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