ASTM A579 Gr.21 datasheet,ASTM A579 Gr.21 chemical,ASTM A579 Gr.21 heat treatment

ASTM A579 Gr.21
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Technical specifications of Aircraft standards high tensile strength steel ASTM A579 Gr.21 data sheet, ASTM A579 Gr.21 Chemical compositions, A579 Gr.21 Mechanical properties from Steelmaking, ESR melted, Blooming, Hot forging,Hot rolling,Heat treatment, Straightening, 100% Ultrasonic test, Cold working, Peeled or rough turned machining. Technical specification ASTM A579. We also possess the advanced precision machining equipments for catering for your different special requirements.
 
TECHNICAL SPECIFICATIONS ASTM A579 Gr.21

MATERIAL CATEGORY: Ultra high strength 1450 Mpa alloy steel
MATERIAL DELIVERY CONDITION: Quenched and tempered
MAIN FEATURES: A579 series VAC-ARC steel is a medium carbon, low alloy, ultra high strength 1000Mpa steel primarily designed for high strength structural applications
A579 series steel is produced by the consumable electrode vacuum arc remelting process to provide optimum cleanliness and preferred ingot structure, which in turn provide optimum transverse mechanical properties.
OFFICIAL TEST CERTIFICATE: issued by TUV - SGS BV
CHEMICAL COMPOSITION (WEIGHT %)
C (%):    0.31~0.38
Si (%):    0.20~0.35
Mn (%):  0.60~0.90

P (%)≤:  0.025
S (%)≤:  0.025
Cr (%):   0.60~0.90
Ni (%):    1.65~2.00
Mo (%):  0.30~0.60
V (%):     0.17~0.23
Nb (%):   -
MECHANICAL PROPERTIES
Condition: Heat treated -  Quenched and tempered
Mechanical properties under standard melting   
Tensile strength σb≥/MPa:     1035
Yield strength σs≥/MPa:         965
Elongation δ5≥(%):                13
Reduction of area ф ≥ (%):    40
Mechanical properties under VIM + ESR melting   
Tensile strength σb≥/MPa:     1450
Yield strength σs≥/MPa:         1380
Elongation δ5≥(%):                9
Reduction of area ф ≥ (%):    28   
MAIN FEATURES AND MELTING PROCESS
The steels shall be manufactured by melting process  or VIM + ESR Melted and shall be finished by hot-worked forging.
Forgings may be furnished in one of the following conditions: stress relieving; annealing; solution treatment; solution treatment and ageing; normalizing; normalizing and tempering; or quenching and tempering.
Heat and product analyses shall be employed to assess the conformance of steels with required chemical compositions.
Forgings shall examined by tension and Charpy impact tests and conform to required mechanical properties such as yield strength, tensile strength, elongation, reduction of area, minimum room-temperature Charpy V-notch energy absorption, maximum annealed hardness, and section size capability. Nondestructive tests, such as magnetic particle, liquid penetrant, and ultrasonic inspection procedures, shall also be performed.
TYPICAL APPLICATIONS
Power generation – turbine fasteners – boiler support rods
Process plant – fasteners
Mechanical gears, gear shaft, main axis, valve rod
Multidiameter shaft
Pressure vessel
PRODUCT PROFILE AND AVAILABLE FORMS
Round bar (Diameter):  0.50mm to 800mm
Square bar / Flat bar:   3mm to 800mm
Length: random length, fixed length or based on the customer's special requirement.
Steel strip: T0.20 ~ 3mm X W10 ~ 2000mm X Coil
Heavy/middle plate via hot rolled: T4 - 200mm X W1000- 2500mm X L1000-12000mm
Forging piece: stepped shafts with flanks / discs /tubes /slugs /donuts /cubes /other different shapes based on OEM.  

TECHNICAL SALES ASSISTANCE & SERVICE
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lh.steel@hotmail.com
  

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