PPT presentation of Temperature Uniformity Survey & System Accuracy Test .

How to find weight of an object using volume

To find mass of an object using volume just by using below formula

P=m/V

Where
P is  density
m is mass of an object
V is volume of an object


For example

V = 7.76 cubic cm
P = 7.8 g/cubic cm

By rearranging the above formula  m= PV

So, the mass of an object is 60.55 g

Pitting Resistance of Stainless steels and related Alloys - Hint for ASTM G 48 Method A

As a part our scope today i have prepared sample for Corrosion test

ASTM standard recommends following

1. Sample should be 25 x 50 mm
2. All the surface of the specimen shall be ground to 120 grit
3. After sample preparation allow the specimen to form chromic oxide layer by reacting with atmosphere( i.e Passivation for 24 hrs)

Formula for calculation of case depth measured using hardness traverse method.

Many of us dont know how to finalize the case depth measured using hardness traverse method.
Use given formula

                   (D2-D1)(H1-Hs)
CD= D1+     -------------------
                        (H1-H2)
For example
Here i calculate Case depth for your reference.
 distance from case          Hardness(HV)
 towards core
0.05 mm                                 887
0.10 mm                                 774
0.15 mm                                 654
0.20 mm                                 570
0.25 mm                                 521
 In above hardness measured using hardness traverse has exceeded cut off values (i.e 550 VPN)
Take the distance and hardness value above cut off and below cut off value
D1 =0.20 mm
D2 =0.25 mm
H1 =570 HV
H2 =521 HV
Hs =550 HV( always remains constant)
 and apply to formula mentioned above and get effective case depth. for above case it is 0.22 mm.

CRGO Steel or Electrical Steel

Today i heard about CRGO Steel and become curious to know what it is

Then i go through my academic books to find out

These are my finding and it will be helpful for you also

CGRO Steel stands for Cold Rolled Grain Oriented steel mainly using in Power Transmission

It is iron - silicon steel. Silicon as an alloying element makes it high electrical resistivity which will reduce the loss during transmission(i.e Hysteresis loss)