Pipe 253MA & Hollow Bar


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Sandvik SANMAC 316/316L is a molybdenum-alloyed austenitic chromium-nickel steel with improved machinability.

 

CHEMICAL COMPOSITION (NOMINAL), %

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STANDARDS

Type of steel

• ASTM TP 316L, 316
(MT 316L, MT 316)
• UNS S31603, S31600
• EN 1.4404a), 1.4401a)
• EN name X 2 CrNiMo 17 12 2a)
X 5 CrNiMo 17 12 2a)
• W.-Nr. 1.4404, 1.4401
• DIN X 2 CrNiMo 17 13 2
X 5 CrNiMo 17 12 2
• SS 2348, 2347
• AFNOR Z 2 CND 17.12
• BS 316S11
• JIS SUS316TKA

Product standards in applicable parts

• DIN 17456 (excl. hydrostatic test)

• SS 14 23 48, 14 23 47

• NFA 49-317

• (ASTM A511)

•JIS G3446

Approval

• JIS Approval No. SE9402 for Stainless Steel Tubes

 


a) Valid for sheet/plate, strip, semifinished products, bars, rods and sections for general purposes (not for pressure purposes).

 

MECHANICAL PROPERTIES

For hollow bar with wall thicknesses greater than 10 mm (0.4 inch) the proof strength may fall short of the stated values by about 10 MPa (1.4 ksi).

At 20°C (68°F)

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1 MPa = 1 N/mm2

a) Rp0.2 and Rp1.0 correspond to 0.2% offset and 1.0% offset yield strength, respectively.

b) Based on L0= 5.65√S0, where L0 is the original gauge length and
S0 the original cross-section area.

c) NFA 49-317 with min 45% can be fulfilled.

The impact energy (Charpy V) at -60 °C (-75 °F) is min 150 J
(110 ft-lb).

At high temperatures

Metric units

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Imperial units

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CORROSION RESISTANCE

General corrosion

Sandvik SANMAC 316/316L has good resistance in

  • organic acids at high concentrations and moderate temperatures
  • inorganic acids, e.g. phosphoric and sulphuric acids, at moderate concentrations and temperatures. The steel can also be used in sulphuric acid of concentrations above 90% at low temperature.
  • salt solutions, e.g. sulphates, sulphides and sulphites
  • caustic environments.

Stress corrosion cracking

Austenitic steels are susceptible to stress corrosion cracking. This may occur at temperatures above about 60°C (140°F) if the steel is subjected to tensile stresses and at the same time comes into contact with certain solutions, particularly those containing chlorides. In applications demanding high resistance to stress corrosion cracking we recommend the austenitic-ferritic steels Sandvik SAF 2304, Sandvik 10RE51 or Sandvik SANMAC SAF 2205. See data sheet S-1871-ENG, S-1867-ENG or S-1873-ENG.

Intergranular corrosion

Sandvik SANMAC 316/316L has a low carbon content and there fore good resistance to intergranular corrosion.

Pitting and crevice corrosion

Resistance to these types of corrosion improves with in creasing molybdenum content. Thus, the molybdenum-alloyed Sandvik SANMAC 316/316L has substantially higher resistance to attack than steels of type AISI 304 and 304L.

Gas corrosion

Sandvik SANMAC 316/316L can be used in

  • air up to 850°C (1560°F)
  • steam up to 750°C (1380°F)

Creep behaviour should also be taken into account when using the steel in the creep range.

In flue gases containing sulphur, the corrosion resistance is reduced. In such environments the steel can be used at temperatures up to 600–750°C (1110–1380°F) depending on service conditions. Factors to consider are whether the atmosphere is oxidising or reducing, i.e. the oxygen content, and whether impurities such as sodium and vanadium are present.

HEAT TREATMENT

Hollow bar is delivered in heat treated condition. If additional heat treatment is needed after further processing the following is recommended.

Stress relieving

850–950°C (1560–1740°F), cooling in air.

Solution annealing

1000–1100°C (1830–2010°F), rapid cooling in air or water.

 

APPLICATIONS

SANMAC 316/316L is used for a wide range of industrial applications where steels of type AISI 304/304L have in sufficient corrosion resistance. Typical examples are: Machined parts for tube and pipe fittings, valves, components for pumps, heat exchangers and vessels, different tubular shafts in chemical, petrochemical, fer tili ser, pulp and paper and power industries as well as in the production of pharmaceuticals, foods and beverages.

 

FURTHER INFORMATION

The following printed matter can be or de red from your nearest Sandvik office

S-029-ENG SANMAC Bar & Hollow Bar
S-02909-ENG SANMAC Bar & Hollow Bar – pocket handbook
S-110-ENG Sandvik tube–pipe–hollow bar, seamless standard programme in stainless
S-2363-ENG Stainless welding consumables
S-2361-ENG Wire electrodes and filler wire/rods
S-2362-ENG Covered electrodes
S-2365-ENG Flux cored electrodes
 

FORMS OF SUPPLY

Hollow bar – Finishes, dimensions and tolerances

Hollow bar in Sandvik SANMAC 316/316L is stocked in a large number of sizes in dimensions up to 250 mm outside diameter in the solution-annealed and white-pickled condition. See catalogue S-110-ENG and S-02909-ENG.

Dimensions are given as outside and inside diameters with guaranteed component sizes after machining.

Outside diameter tolerance is +2/-0%, but minimum +1/-0 mm.

Inside diameter tolerance is +0/-2%, but minimum +0/-1 mm.

Straightness +/- 1.5 mm/m.

Better tolerances can be supplied on special order.

Other forms of supply
Bar

Steel with improved machinability, SANMAC, is also available
in bar.

Filler metal for welding

The sizes listed below are Sandvik stock stan dard. The local stocks carry sizes in common demand on the market. For technical in for ma tion on the filler metals please refer to brochures S-2361-ENG and S-2362-ENG

Wire electrodes and filler wire/rods

Sandvik 19.12.3.L: 0.80, 1.00, 1.20, 1.60, 2.00, 2.40,
3.00, 3.20, 4.00 mm.

Covered electrodes

Sandvik 19.12.3.LR: 1.6, 2.0, 2.5, 3.25, 4.0 mm
Sandvik 19.12.3.LB: 2.0, 2.5, 3.25, 4.0, 5.0 mm
Sandvik 19.12.3.LRHD: 2.5, 3.25, 4.0, 5.0 mm

 

 

 

 

 

 

 

PHYSICAL PROPERTIES

Density, 8.0 g/cm3, 0.29 lb/in3

Thermal conductivity

wearplate, pipa 253ma, jual plat besi, distributor wear plate, distributor besi

Specific heat capacity

wearplate, pipa 253ma, jual plat besi, distributor wear plate, distributor besi

Thermal expansion, mean values in temperature ranges (x10-6)

wearplate, pipa 253ma, jual plat besi, distributor wear plate, distributor besi

Modulus of elasticity, (x103)

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WELDING

Suitable welding methods for Sandvik SANMAC 316/316L are manual metal-arc welding with covered electrodes and gas-shielded arc welding with the TIG and MIG methods as first choice. Preheating and post-weld heat treatment are not normally necessary.

Due to the fact that this material is alloyed in such a way that it shall have good machinability there can be a higher amount of surface oxides on the weld beads compared to standard 316/316L steels.

Since this material has low thermal conductivity and high thermal expansion, welding must be carried out with a low heat input and with welding plans well thought out in advance so that the deformation of the welded joint can be kept under control. If, despite these precautions, it is foreseen that the residual stresses might impair the function of the weldment, we recommend that the entire structure be stress relieved. See under “Heat treatment”.

As filler metals for gas-shielded arc welding we recommend wire electrodes and rods Sandvik 19.12.3.L,19.12.3.LSi. In shielded metal-arc welding (SMAW) covered electrodes Sandvik 19.12.3.LR, 19.12.3.LB or 19.12.3.LRHD are recommended.

MACHINING

SANMAC stands for Sandvik Machinability Concept. In SANMAC materials, machinability has been improved without jeopardising properties such as corrosion resistance and mechan ical strength.

The improved machinability is owing to:

  • optimised non-metallic inclusions
  • optimal chemical composition
  • optimised process and production parameters

Detailed recommendations for the choice of tools and cutting data regarding turning, thread cutting, parting/grooving, drilling, milling and sawing are provided in the brochure S-02909-ENG.

The diagram shows the ranges within which data should be chosen in order to obtain a tool life of minimum 10 minutes when machining austenitic SANMAC 316/316L.

The ranges are limited in the event of low feeds because of unacceptable chip breaking. In the case of high cutting speeds, plastic deformation is the most dominant cause of failure. When feed increases and the cutting speed falls, edge frittering (chipping) increases significantly. The diagram is applicable for short cutting times. For long, continuous cuts, the cutting speeds should be reduced somewhat.

The lowest recommended cutting speed is determined by the tendency of the material to stick to the insert (built-up-edge), although the integrity of insert clamping and the stability of the machine are also of great significance.

It is important to conclude which wear mechanism is active, in order to optimise cutting data with the aid of the diagram.

 

 

 

 

 

 

 

 

 

 

wearplate, pipa 253ma, jual plat besi, distributor wear plate, distributor besi
wearplate, pipa 253ma, jual plat besi, distributor wear plate, distributor besi
wearplate, pipa 253ma, jual plat besi, distributor wear plate, distributor besi
wearplate, pipa 253ma, jual plat besi, distributor wear plate, distributor besi

 

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