EN21 datasheet,EN21 chemical,EN21 heat treatment

EN21
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Description EN21 datasheet, EN21 Chemical, v Properties from Steelmaking, 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 DATA SHEET - Grade EN21

MATERIAL CATEGORY - Low alloy steel with high tensile
TECHNICAL SPECIFICATION - BS970 Part 3
MELTING: Consumable electrode remelted steel
OFFICIAL TEST REPORT - issued by TUV - SGS -  BV
CHEMICAL COMPOSITIONS (WEIGHT - %)
C (%):     0.25 ~ 0.35
Mn (%):   0.35 ~ 0.75
Si (%):     0.10 ~ 0.35
P (%)≤:   0.035
S (%)≤:   0.015
Cr (%):    0.20 ~ 0.40
Ni (%):     2.75 ~ 3.25
Mo (%):   -
MECHANICAL PROPERTY AND HARDNESS
Quenching temperature /℃: 830, oil
Tempering temperature /℃: 480, water or oil
Tensile strength,σb/≥ MPa: 930
Yield strength, σ0.2/≥ MPa: 785
Elongation, δ ≥(%): 9.0
Reduction of area, ф ≥(%): 45.0
Hardness in annealed condition: HB 241 max.
MELTING PROCESS & APPLICATION
This
alloy is generally smelt in Electric Arc Furnace  (EAF), EAF+LF+VD, BEF + Electroslag remelting (ESR).
For a purpose of superior quality, it should be smelt via technology of vacuum refining or by agreement.
It is suitable for applications such as high tensile shafts, bolts and nuts, gears, pinions spindles and so on. 
AVAILABLE FORMS & DIMENSIONS
Round bar: 5.5mm to 550mm
Square bar / Flat bar: 10mm to 800mm
Length: Fixed length or random length or based on the customer's special requirement.
Other different shapes based on OEM.  
TECHNICAL SALES ASSISTANCE & SERVICE
If you meet further on any technical enquiry, pleased to EMAIL our resident team of qualified production engineers. E-mail:
sales@ccsteels.com.

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