CLC 17-12-2L - Ed 28.10.1999 - Page 1

CLC 17-12-2L A 2%Mo containing 18 Cr 10 Ni austenitic stainless steel (316L grade)

CLC 17-12-2L is one of the basic grade of the stainless steels range. 2% Molybdenum bearing ensures better corrosion resistance than CLC 18-9 L grade, particularly regarding to uniform and localized corrosion. Alloy CLC 17-12-2L is an austenitic microstructure grade, free of deleterious carbide precipitations in grain boundaries. The grade contains some residual ferrite (3%) after solution annealing (1050-1150C 1922-2102F) and water quenching. Chemistry and heat treatments may be optimized in order to control the ferrite content. The CLC 17-2-2L steel resists to wet atmosphere or room temperature solutions containing some chloride or fluoride additions. The steel is not seawater resistant. The alloy may be used in diluted sulphuric acids at low temperature ( 330C - 626F) as well as in sour organic solutions. The grade is also well known for its higher ductility, particularly when considering cold forming

EURONORM............................. 1.4404 X2CrNiMo 17.12.2 AFNOR ..................................... Z3 CND 17-11-02 DIN............................................ W1.4404 ASTM. ....................................... A 240 TP 316L UNS S31603

STANDARDS

Typical values (Weight %) C Cr Ni Mo N Others

0.020 17 10.5 2.1 0.05 -

PREN (%Cr+3.3%Mo+16%N) 24

CHEMICAL ANALYSIS

Tensile properties after solution annealing heat treatment Minimum guaranteed values * Typical values (10mm plates)

C F Y.S. 0.2% Y.S. 1% UTS Y.S. 0.2% Y.S. 1% UTS El%

MPa Ksi MPa Ksi MPa Ksi MPa Ksi MPa Ksi MPa Ksi 20 68 220 32 260 38 520

/ 670 76

/98 310 44 350 51 580 85 45

100 212 166 24 199 29 430 63 280 40 330 48 490 72 43 200 392 137 20 167 24 390 57 200 28 230 33 450 66 35 300 572 118 17 145 21 380 56 175 25 200 30 440 64 35 400 752 108 16 135 20 380 56 150 22 180 29 430 63 30 500 932 100 15 128 19 360 52 135 19 165 24 410 60 30

*Following EN 10088 hot rolled plates - The EN guaranteed values are valid for a thickness from 5 to 75mm

MECHANICAL PROPERTIES

CLC 17-12-2L - Ed 28.10.1999 - Page 2

Impact values

C -269* -196 +20 (C) 450 550 650 700 750 800 850 F -452* -320 68 (F) 842 1022 1202 1292 1382 1472 1562

KCV (J/cm) Minimum 75 125 187 Ageing H 2000 2000 2000 2000 500 500 500

KCV (J/cm) Typical 125 250 312

KCU J/cm 230 245 155 140 140 145 165

* optimized heats with extra low ferrite

Density : 7950 kg/m3

Interval Temp

Thermal expansion

C

F

Resistivity

Thermal conductivity

Specific heat

Young modulu

s E

Shear modulu

s G

C x10-6K-1 ( cm) (W.m-1.K-1) (J.kg-1.K-1) (GPa) (GPa) 20-100 16 20 68 75 15 500 200 77 20-200 16.5 100 212 80 16 500 194 74 20-300 17 200 392 85 17.5 520 186 70.5 20-400 17.5 300 572 92 19 530 172 66.5 20-500 18 400 752 95 20.5 540 172 62.5

500 932 100 22 540 165 59.5

Magnetic permeability : 1.015 to 1.050 (skin)

Quality corrosion tests guaranteed (special request may be discussed)

TEST Other name Corrosion (1) Results

ASTM A 262 A Intergranular Step of dual structure

ASTM A 262 B STREICHER Intergranular 1mm/year (not sensitived)

ASTM A 262 C HUEY Intergranular < 0,6 mm/year*

ASTM A 262 E DIN 50914 RCCM

STRAUSS Intergranular No cracking after bending

ASTM G48A Pitting Not recommended (typical CPT 5C)

ASTM G48B ASTM G78 Crevice Not recommended (typical CCT 5C)

(1) kind of corrosion mechanism investigated *using low ferrite grade

CORROSION RESISTANCE

0

100

200

300

400

500

600

0,0 0,2 0,4 0,6 0,8 1,0

AISI316L

AISI304L

Time to fracture, h

Stress/tensile strength 100C (210F)

C CPT, +300 mV/SCE F

Cl - , weight -%

0.020.01 0.05 0.20.1 0.5 1.0 2.0

80

60

40

20

0

175

140

105

68

32

100 210

AISI 316L

AISI 304L

Pitting

No Pitting

PHYSICAL PROPERTIES

Fig 1 - Results of SCC test with constant load in 40% CaCl2 at 100C (210F) with aerated test solution

Fig 2 - Critical pitting temperatures (CPT) for AISI 304 and AISI 316 at varying concentrations of sodium chloride (potentiostatic determination at +300 mV/SCE) pH 6.0

CLC 17-12-2L - Ed 28.10.1999 - Page 3

100

80

60

40

20

212

176

140

104

680 20 40 60 80 100

H2SO4 (% wt)

Temperature C Temperature F

304L

316L904L

Boiling

20406080

100120140160

100800 20 40 60HNO3 weight %

Temperature C Temperature F

68104140176212248284320

304L/ 316L

13% Cr steel

20406080

100120140160

100800 20 40 60NaOH, weight %

Temperature C Temperature F

68104140176212248284320Risk of SCC

304L/ 316L

Solubility

904L

Fig 4 Isocorrosion diagram 0.1 mm/year, in sodium hydroxide.

Broken line curve represents the boiling point Fig 3 - Isocorosion diagram 0.1 mm/year for austenitic stainless steels in natural aerated sulphuric acid of chemical purity

Hot forming

Hot forming should be carried out in a temperature range of 1150-800C (2102-1472F). If the final forming temperature falls below 950C (1742F), an annealing solution (1050-1150C, 1922-2102 F) is necessary.

The cleanliness of the surface is very important (avoid oil contamination). A neutral or slightly oxidising atmosphere is required. Due to the low thermal conductivity, the holding time of temperature may be longer than for a carbon steel ( 50%). Quenching must be done fastly after forming.

Cold forming

The alloy can be cold formed without any problem. The cold hardening of the steel explains why it may require more powerfull equipments than for a structural steel. Molybdenum bearing implies also some more powerfull equipments than Cr-Ni austenitic stainless steels.

Pickling

A nitro-hydrofluoric acid bath (10-20% HNO3 1,5-5% HF) at 20-60C (68-142F) is used for the picking treatment.

A 10-20% H2S04 1,5-5% HF pickling bath may also be used. Passivation-decontamination treatments may be performed with a 10-20% weight nitric acid solution.

Cutting

Thermal cutting (plasma, thermal sawing). After cutting pickling or grinding are necessary to eliminate the oxide formed layer.

Mechanical cutting (shearing, stamping, cold sawing).

Welding

The alloy can be easy welded without hot cracking phenomenon, using an adequate filler metal (from 5 to 15% ferrite).

The alloy is not sensitive to cold cracking phenomenon. All welding processes can be used including filler processes.

Filler material Electrode E316L-15 or E316L-16 (ASME Sect II Part C SFA5-4) Wire ER 316L (ASME Sect II - Part C SFA 5-9)

PROCESSING

Fig 5 Isocorrosion diagram 0.1 mm/year, in nitric cid. Broken line represents the boiling point

CLC 17-12-2L - Ed 28.10.1999 - Page 4

A post-weld heat treatment is not necessary.

Preheating and post heating are not necessary. 200C (392F) is the maximum interpass temperature. Post-weld pickling and passivation treatment are necessary.

Due to its cold work hardening, the alloy is less machinable than structural steel or than a 13% Cr martensitic stainless steel. To improve the machinability, Industeel has developed a grade called FASTINOX 17-12-2-2.

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- Wet corrosion resistance properties in medium severe conditions

- Chemical industry (industrial phos-phoric acid ; Concentration < 30% P205 without abrasion ; < 60C 140F )

- Food and beverage processing industry - Water treatment - Rail and road containers and tanks - Household appliances - Building decoration

Quarto plates Plates

Cut to length Cold rolled plates Clad plates

Thickness 5 to 150 mm 3/16" to 6"

2 to 12 mm 5/64" to 1/2"

2 to 14 mm 5/64" to 5/8"

6 to 150 mm 1/4" to 6"

Width Up to 3800 mm*

Up to 150" Up to 2000 mm*

Up to 79" Up to 2300 mm

Up to 90.5" Up to 3900 mm

Up to 154"

Length Up to 16000 mm

Up to 52' Up to 12000 mm

Up to 39" Up to 8000 mm

Up to 315" Up to 16000 mm

Up to 551" Indicative dimensional programme *Width related to thickness ; please consult for specific request.

NOTE

This technical data and information represents our best knowledge at the time of printing. However, it may be subject to some slight variations due to our ongoing research programme on corrosion resistant grades. We therefore suggest that information be verified at time of enquiry or order. Furthermore, in service, real conditions are specific for each application. The data presented here is only for the purpose of description, and may only be considered as guarantees when our company has given written formal approval. Further information may be obtained from the following address.

For all information : INDUSTEEL Creusot

INDUSTEEL Belgium

56 Rue Clemenceau 71201 LE CREUSOT CEDEX - FRANCE

266, rue de Chtelet B- 6030 MARCHIENNE AU PONT

Sales Tel Fax

+33 3 85 80 55 31 +33 3 85 80 51 77

Tel Fax

+32 71 44 16 99 +32 71 44 19 56

MACHINING

APPLICATIONS

SIZE RANGE