Form. No  F/QA/09
Issue No  A
Date 08.08.07
REFERENCE No.: - 2408     VENDOR NAME & CODE: Aarti Steel
MATERIAL SPEC.: SAE 1541(M)   DATE OF RECEIPT: 27/10/2011
HEAT NO. & SIZE: 58 Dia & 10085(Automotive Axle) CONDITION OF SUPPLY: As Rolled

CHEMICAL TESTING AS PER IS: 228

% Age Element C Mn Cr Si S P Ni Mo
SPECIFIED 0.35
0.44
1.25
1.60
0.15
0.20
0.15
0.35
0.010
0.025
0.035
Max
- 0.03 0.06
ACTUAL 0.42 1.59 0.19 0.21 0.020 0.020 - 0.035

MACRO ANALYSIS

MACRO STRUCTURE: C2  R2  S2  observed
GRAIN FLOW Grain flow as in Rolling Direction 

MACRO ANALYSIS

AS ROLLED:

HARDNESS (BHN.) :     207BHN

   MICROSTRUCTURE: MICROSTRUCTURE:     As Rolled grain Size 6ASTM at 100X
NORMALIZED

HARDNESS (BHN.):      187BHN

   MICROSTRUCTURE:

MICROSTRUCTURE:     Fine pearlite/ Ferrite

GRAIN SIZE AS PER IS: 4748 – 1988
INCLUSION RATING AS PER IS: 4163 – 1982
INCLUSION
SULPHIDE – (A) ALUMINA – (B) SILICATE – (C)  GLOB. OXIDE – (D)
THIN THICK THIN THICK THIN THICK  THIN THICK
SPECIFIED 2.5 1.5 2.5 0.15
2.5 0.15 2.5 0.15
OBTAINED 0.42 1.59 0.19 0.21 0.020 0.020 - 0.035

OTHER ANALYSIS

1. JOMINY HARDENABILITY AS PER IS: 3848 – 1981.

 

2. STEP DOWN TEST AS PER IS: 10138 (PART 2) 1981.  
SAMPLE NO. STEP I (0.90D) STEP II (0.75D)

STEP III (0.60D)

                  1 No Streaks Nil Nil
                  2 No Crack Nil Nil
3. SURFACE QUALITY: Free From surface defects  
4. BAR DIAMETER:       Equalize  
 

REMARKS: Accepted – H/T = Tempered martensite Specified  229/269BHN actual (255BHN) D/I Value =2.5 to 3.1 actual (2.6)

Lab Incharge

Lab Incharge

Chief Metallurgist

Prepared By Verified By Approved By