STR661 datasheet,STR661 chemical,STR661 heat treatment
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STR661
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Specifications STR661 heat treatment, STR661 datasheet, Alloy STR 661 chemical Forging Bar machined, STR661 Exporters Technical specifications - KS D3731 - 2002 / 2007. From Melting, ESR & VAR technique, Blooming, Hot forging, Hot rolling, Heat treatment, Straightening, Ultrasonic flaw detection test.
TECHNICAL DATASHEET - Grade STR 661

TECHNICAL SPECIFICATIONS: KS D3731 - 2002/2007
OFFICIAL TEST CERTIFICATE: issued by TUV - SGS -  BV
MATERIAL CATEGORY: Heat resistant stainless
steel bar and plate
CHEMICAL COMPOSITION (WEIGHT %)
C (%):    0.08 ~ 0.16
Si (%):    ≤ 1.50
Mn (%):  1.00 ~ 2.00
P (%) ≤: 0.030
S (%) ≤: 0.020
Cr (%):   20.0 ~ 22.5
Ni (%):   19.0 ~ 21.0
Mo (%):  2.50 ~ 3.50
N (%):     0.10 ~ 0.20
W (%):    2.00 ~ 3.00
Co (%):   18.5 ~ 21.0
Nb (%):   0.75 ~ 1.25
MECHANICAL PROPERTY UNDER ROOM TEMP.
Condition: Solution treated 1130 ~ 1200 Deg.C, Ageing 780 ~ 830 X 4h, air cooling or slow cooling. 
Tensile strength, σb/ ≥ MPa: 755
Yield strength, σ0.2/ ≥ MPa: 343
Elongation, δ (%) ≥: 30.0
Reduction of area, ф (%) ≥: 30.0
Hardness ≤ (HBW): 192 Min.
MELTING PROCESS
The alloy is usually produced by BEF + AOD / EAF, followed by electroslag refining (ESR or VAR ) if necessary for special purpose.
PRODUCT FORMS AVAILABLE
Round bar (Diameter): 5.50 ~ 600mm
Wire rod (Diameter): 0.15 ~ 15mm
Flat bar (Thickness X Width): 10 ~ 400 X 15 ~ 1000mm
Length: random length, fixed length or based on the customer's special requirement.
Form: wire or straightened bar
TECHNICAL SALES ASSISTANCE
If you meet further on any technical inquiry, pleased to EMAIL o
ur resident team of qualified production engineers, Email: sales@ccsteels.com.

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