Grade: 347H, S34700, S34709, 1.4912, SUS347H

Standard: GB/T24511, ASTM A240/A240M, ASTM A480/A480M, ASTM A479, GB 13296, etc.

Type: stainless steel plate, stainless steel bar, stainless steel pipe, etc.

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Product Detail

347 is a stable austenitic chromium steel that contains niobium and eliminates carbide precipitation, thereby eliminating intergranular corrosion. Alloy 347 is stabilized by the addition of chromium and tantalum and provides higher creep and stress fracture properties than alloys 304 and 304L, which can also be used for exposures requiring attention to sensitization and intergranular corrosion. The addition of columbium also makes alloy 347 have excellent corrosion resistance, even better than alloy 321. 347H is the higher carbon content form of alloy 347 and shows improved high temperature and creep properties.

Alloy 347 (UNS S34700) is columbium stabilized austenitic stainless steel plate with good general corrosion resistance and somewhat better resistance in strong oxidizing conditions than 321 (UNS S32100). It has excellent resistance to intergranular corrosion after exposure to temperatures in the chromium carbide precipitation range of 800 – 1500°F (427 – 816°C). The alloy has good oxidation resistance and creep strength to 1500°F (816°C). It also possesses good low temperature toughness. Alloy 347H (UNS S3409) stainless steel plate is the higher carbon (0.04 – 0.10) version of the alloy. It was developed for enhanced creep resistance and for higher strength at temperatures above 1000°F (537°C). In most instances, the carbon content of the plate enables dual certification. Alloy 347 stainless steel plate cannot be hardened by heat treatment, only by cold working. It can be easily welded and processed by standard shop fabrication practices.

If you want to know more about our 347/347H Stainless Steel price please feel free to contact us, we will reply you within 24 hours.

1. Diameter: 5-1500mm, etc.
2. Thickness of plate: 2-14mm, etc.
3. Width: customized

1. Weldability: Alloy 347 can be welded in most standard processes without the need for post-weld heat treatment.Mini-core: using self-developed high-precision automatic winding machine, after high vacuum heat treatment type, high dimensional accuracy, stable performance.
2. Corrosion resistance: Alloy 347/347H shows quite good corrosion resistance. It was developed for intergranular corrosion resistance to exposure to chromium carbide precipitate at temperatures between 800 and 1500°F (427 and 816°C).
3. High temperature strength and high temperature plasticity.

1. Pyrochemical process
2. Heat exchange tube
3. High temperature steam service
4. High pressure steam pipe
5. Radiant superheater
6. Boiler tube
7. Heavy duty exhaust system
8. General refinery pipeline

Element	347(%)	347H(%)
Chromium	17.00 min.–19.00 max.	17.00 min.–19.00 max
Nickel	9.00 min.–13.00 max	9.00 min.–13.00 max
Carbon	0.08	0.04 min.– 0.10 max.
Manganese	2.00	2.00
Phosphorus	0.045	0.045
Sulfur	0.03	0.03
Silicon	0.75	0.75
Columbium & Tantalum	10 x (C + N) min.–1.00 max.	8 x (C + N) min.–1.00 max

Shanghai Metal Products are packed and labeled according to the regulations and customer's requests. Great care is taken to avoid any damage which might be caused during storage or transportation. In addition, clear labels are tagged on the outside of the packages for easy identification of the product I. D. and quality information.

1)Shanghai Metal Standard.

2)Customization.

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347/ 347H Stainless Steel

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