21-12N datasheet,21-12N chemical,21-12N heat treatment
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21-12N
2021-03-25 09:36:15   Origin:   Remark:0 Click:

Valve steel 21-12N Specifications, Datasheet 21-12N Chemical, 21-12N Properties Steelmelting (ESR refined), Blooming, Hot forging, Hot rolling, Heat treatment, Straightening, 100% Ultrasonic flaw detection test, Cold working or Machined. All of these materials conform to Military standard, nuclear power. 100% Ultrasonic test ASTM E2375 /SAE AMS 2154 /SEP 1923 /GB/T 4162 /EN 10228-3.
TECHNICAL DATASHEET - Carpenter 21-12N

MATERIAL CATEGORY - Valve steel series
HS CODE - 72221100 / 72221900
CHEMICAL COMPOSITION (MASS & WEIGHT %)
C (%):     0.15 ~ 0.25
Si (%):     0.70 ~ 1.00
Mn (%):   1.00 ~ 1.50
P (%)≤:   0.045
S (%)≤:   0.030
Cr (%):    20.0 ~ 22
.0
Ni (%):    10.5 ~ 12.5
Mo (%):   -
N (%):     0.15 ~ 0.20
MECHANICAL PROPERTIES UNDER HEAT TREATMENT  
Hot forming temperature /℃: 1100~980
Heat treatment temperature and cooling method | annealed:    -     
Heat treatment temperature and cooling method | quenched:   1150~1180  Water 
Heat treatment temperature and cooling method | tempered:   800~830
Mechanical property, tensils strength, |σb/MPa:  852
Mechanical property yield strength, |σs≥/MPa:  550
Mechanical property elongation, |δ5≥(%): 30.0  
Mechanical property reduction of area, |ψ≥(%): 45.0  
METHOD OF MELTING PROCESS
Valve steel is generally smelt in electric arc furnace EAF or AOD. For higher quality, it should be smelt via technology of vacuum refining and external refining.
PROFILE & DIMENSIONS
Round bar / Wire rod (Diameter): 5.5mm to 450mm
Square bar / Flat bar: 3mm to 450mm
Length: Fixed length or random length or based on the customer's special requirement.
Heavy/middle plate via hot rolled: T6 - 200mm X W60 - 1000mm X L1000-12000mm
Forgings: stepped shafts with flanks / discs /tubes /slugs /donuts /cubes /other different shapes based on OEM.
TECHNICAL SALES ASSISTANCE
If you meet further on any technical enquiry, pleased to EMAIL our resident team of qualified production engineers, Email: sales@ccsteels.com.

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