Project Description

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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

TP347 TP347H 1.4550 1.4961 Stainless Steel Pipe and Tube

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 S34709) stainless steel 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.

Stainless Seamless Fluid Pipe Quality Control

  1. Raw materials pipe blank quality classification: high quality, medium, economical
  2. Raw materials inspection after receive in factory
  3. After pickled, tube will be grinded careful to less defect
  4. Multiple cold drawn/rolled process for precision dimension
  5. Standard heat-treated of continuous annealed/solution for better property, intergranular corrosion
  6. Full Inspection: ET, UT, Hydraulic Test, Penetration Test, Grinded, Sand Blast, Print Making

*Besides bleow, we can supply comfortable price with equivalents quality for you! Welcome contact us.

We also can supply other kinds of:

  • Seamless Stainless Steel Pipe & Tube
  • Welded Stainless Steel Pipe & Tube
  • U Type Stainless Steel Pipe & Tube
  • Coil Type Stainless Steel Pipe & Tube(Max 300meter), seamless or welded
  • Annealed Pickled AP Stainless Steel Pipe & Tube (Ra ≤5μm)
  • Bright Annealed BA Stainless Steel Pipe & Tube (Ra ≤8μm)
  • Mechanical Polished MP Stainless Steel Pipe & Tube (Ra ≤8μm)
  • Electro Polished EP Stainless Steel Pipe & Tube (Ra ≤25μm)
  • Sanitary Stainless Steel Pipe & Tube
  • Capilllary Stainless Steel Pipe & Tube
  • Instrument Stainless Steel Pipe & Tube

Applications

Chemical Processing

Food Processing – equipment and storage

Petroleum Refining – fluid catalytic cracking units, polythionic acid service

Pharmaceutical Production

Waste Heat Recovery – recuperators

Equivalent grades of   steel   X6CrNiNb18-10 (1.4550)

DIN EU
EN		 USA
–		 UNS France
AFNOR		 England
BS		 Sweden
SS		 Russia
GOST
1.4550 X6CrNiNb18-10 347 S34700 Z6CNNb18-10 347S31 2338 08KH18N12B
1.4961 X8CrNiNb16-13 347H S34709

Chemical Properties:

C Cr Mn Ni P S Si Cb/Ta
347 0.08 max min: 17.0
max: 20.0		 2.0 max min: 9.0
max: 13.0		 0.04 max 0.30
max		 0.75
max		 min:10x C
max: 1.0
347H min: 0.04
max: 0.10		 min: 17.0
max: 20.0		 2.0 max min: 9.0
max: 13.0		 0.03 max 0.30
max		 0.75
max		 min:10x C
max: 1.0

Mechanical Properties:

Grade Tensile Strength ksi (MPa) min Yield Strength 0.2% ksi offset ksi (MPa) min Elongation (% in 50mm) min Hardness (Brinell) MAX Hardness (Rockwell B) MAX
347/347H 75
(515)		 30
(205)		 40 201 95

Stainless Steel Tube & Pipe Sizes:

Outsider Diameter OD : 6-630mm ; WT 3-60mm ; L max 16meter

Stainless Steel Tube Delivery Condition:

  • Solution Treatment

Stainless Tube 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

Stainless Pipe Inspection and Testing:

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

Stainless Tube Marking and Packages:

In addition to the marking prescribed in specification as client’s request.

Bare / Nylon / Plastic / Wooden Case

Corrosion Resistance

Alloy 347 stainless steel plate exhibits good general corrosion resistance that is comparable to 304. It was developed for use in the chromium carbide precipitation range of 800 – 1500°F (427 – 816°C) where un-stabilized alloys such as 304 are subject to intergranular attack. In this temperature range, the overall corrosion resistance of Alloy 347 stainless steel plate is superior to Alloy 321 stainless steel plate. Alloy 347 also performs somewhat better than Alloy 321 in strongly oxidizing environments up to 1500°F (816°C).

The alloy can be used in nitric solutions, most diluted organic acids at moderate temperatures and in pure phosphoric acid at lower temperatures and up to 10% diluted solutions at elevated temperatures. Alloy 347 stainless steel plate resists polythionic acid stress corrosion cracking in hydrocarbon service. It can also be utilized in chloride or fluoride free caustic solutions at moderate temperatures.

WELDABILITY

Austenitic stainless steels are considered to be the most weldable out of all high alloy steels

Can be welded by all fusion and resistance welding processes

HEAT TREATMENT

Annealing temperature range is 1800 to 2000°F

May be stress relief annealed within the carbide precipitation range of 800 to 1500°F without any danger of subsequent intergranualr corrosion

Cannot be hardened by heat treatment

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:

  1. Cold Rolled Steel Tube
  2. Cold Drawn Steel Tube
  3. Hollow Bar
  4. Honed Tube
  5. Plated Tube
  6. Plated Bar
  7. Boiler Tube

All Products According Quality Standard Strictly:

  1. ASTM: ASTM A519, ASTM A513.
  2. JIS:JIS G3441, JIS G3445, JIS G3466, JIS G3459.
  3. DIN: DIN1626, DIN1629, DIN2391, DIN2393, DIN2448, DIN2458.
  4. EN: EN10305.
  5. BS: BS6323.

Wide Range of Pipes to Fit Your Industry:

  1. OD from 5mm to 820mm.
  2. Wall Thickness from 0.1 to 100mm.
  3. Length up to 50mtr per pc.

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