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1.4767, DIN CrAl 20 5

We can produce 1.4767, DIN CrAl 20 5 stainless steel round rods, 1.4767, DIN CrAl 20 5 forging,sheet,coil,and profiledstrip,Deformed steel,flat steel,mould,steel wire,have all specifications. With DuoNian production experience, strict control 1.4767, DIN CrAl 20 5 chemical composition and 1.4767, DIN CrAl 20 5 mechanical properties.From casting, forging, steel to hot and cold rolling process, heat treatment, etc, we have the control of professional engineers. We have advanced precision machining equipment, according to the requirements of users machining. in order to achieve the most satisfied with the user requirements.

Production specification

Round bar steel: 1mm to 3500mm
Square-shape steel: 1mm to 4000mm
Plate steel:0.1mm to 4000mm
Width: 10mm to 2500mm
Lenth: We can supply any lenth based on the customer's requirement.
Forging: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes
Tubings: OD: φ6-1800mm, with wall thickness ranging from 1-35 mm.
Finished goods condition: hot forging/hot rolling + annealing/normalizing + tempering/quenching + tempering/any conditions based on the customer's requirement
Surface conditions: scaled (hot working finish)/ground/rough machining/fine machining/based on the customer's requirement
Furnaces for metallurgical processing: electrode arc + LF/VD/VOD/ESR/Vacuum consumable electrode.
Ultrasonic inspection: 100% ultrasonic inspection for any inperfections or based on the customer's requirementExcellent service for all kinds of industries,with advantages of technologies, equipment and price.
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1.4767, DIN CrAl 20 5

Designation by Standards

Brand Name	LH No.	Mat. No.	DIN	EN	AISI
RAVNAL2	944	1.4767	CrAl 20 5	-	-

Chemical Composition (in weight %)

C	Si	Mn	Cr	Mo	Ni	V	W	Others
max. 0.10	max. 1.00	max. 1.00	20.50	-	-	-	-	Al=4.75, Y=0.1, Hf=0.1

Description
Ravnal 2 is aluminium containing ferritic chromium steel. High temperature resistance with good oxidation resistance under isothermal and cyclic conditions. Steel has very good high temperature strength. Maximum aplication temperature is 1150^oC. Steel is resistant to scale.

Applications
Heating elements of smaller dimensions for electric heaters, pressure vessels with service temperature up to 899^oC.

Physical properties (avarage values) at ambient temperature
Modulus of elasticity [10³ x N/mm²]: 210
Density [g/cm³]: 7.16
Thermal conductivity [W/m.K]: 9.8
Electric resistivity [Ohm mm²/m]: 0.14
Specific heat capacity[J/g.K]: 0.49
Resistance:
Atmosphere: resistant
Seawater: little resistant
Lyes: average resistant
Acids: large to poore resistant

Coefficient of Linear Thermal Expansion 10^-6 ^oC^-1

20-100^oC	20-200^oC	20-300^oC	20-400^oC	20-500^oC	20-600^oC	20-700^oC	20-800^oC	20-900^oC
12.2	12.4	12.6	12.9	13.3	13.6	13.8	14.3	14.8

Mechanical Properties vs. Temperature

Temperature in ^oC	20	600	800	1000
0.2% Proof Stress in N/mm²	510	185	55	25
Tensile Strength in N/mm²	650	190	60	30
Elongation in %	15	75	80	25

Heating
Workpieces must be clean and free from all kinds of contaminants before and during heat treatment.

Soft Annealing
Heat above 800^oC. For optimum properties the material should be water quenched after annealing.

Forging
Hot forming temperature: 1050-850^oC, followed by water quenching or rapid air cooling. Note: Heat treatment after hot working is recommended in order to achieve optimum properties. For heating up, workpieces should be charged into the furnance at temperature. Hot bending is preferably carried out at 200 to 300^oC.

Machinability
RAVNAL2 should be preferably be machined in the thermally treated condition.

Cold working
The material should be in the soft annealed condition.

Welding
Alloy can be welded by the GTAW process. For welding the material should be in the soft annealed condition and be free from scale, grease and markings.

Descaling
High temperature alloys develop a protective oxide scale in service. Pre-oxidation in air can produce increased corrosion resistance at high temperatures. Therefore based on the end use the necessity of descaking should be checked.

Mechanical properties

1.4767, DIN CrAl 20 5 Mechanical properties,Our production completely according to the 1.4767, DIN CrAl 20 5 standards to meet the 1.4767, DIN CrAl 20 5 mechanical performance, can also according to the customer request, to meet the requirements of customers of 1.4767, DIN CrAl 20 5 mechanical properties.

Heat treatment

1.4767, DIN CrAl 20 5 Heat treatment,Our production completely according to the 1.4767, DIN CrAl 20 5 standards to meet the 1.4767, DIN CrAl 20 5 Heat treatment, can also according to the customer request, to meet the requirements of customers of 1.4767, DIN CrAl 20 5 Heat treatment.

Machining

1.4767, DIN CrAl 20 5 Machining,Our production completely according to the 1.4767, DIN CrAl 20 5 standards to meet the 1.4767, DIN CrAl 20 5 Machining, can also according to the customer request, to meet the requirements of customers of 1.4767, DIN CrAl 20 5 Machining.

Welding performance

1.4767, DIN CrAl 20 5 Welding performance,Our production completely according to the 1.4767, DIN CrAl 20 5 standards to meet the 1.4767, DIN CrAl 20 5 Welding performance, can also according to the customer request, to meet the requirements of customers of 1.4767, DIN CrAl 20 5 Welding performance.

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