AA 102 08
CORPORATE PURCHASE SPECIFICATION Rev. No. 07
PREFACE SHEET
HOT ROLLED / FORGED CARBON STEEL BARS, Gr : 40C8 - NORMALISED
FOR INTERNAL USE ONLY
REMOVE THIS PREFACE BEFORE ISSUE TO SUPPLIERS
The Information on this document is the property of BHARAT HEAVY ELECTRICALS LIMITED
It must not be used directly or Indirectly in any way detrimental to the Interest of the company.
Comparable Standards:
1. INDIAN IS : 1570, Part II, Section I - 1979
Gr: 40C8(c40) Normalised
COPYRIGHT AND CONFIDENTIAL
Suggested/Probable Suppliers and Grades:
Refer Plant Vendors list
User Plant References:
1. BHOPAL : PS 10208
2. HEEP, HARDWAR : 0500.007
Gr: C40, Hot Rolled
3. HYDERABAD : HY 021 02 99
4. TIRUCHY : BM - CQ 35
APPROVED :
Revisions :
INTERPLANT MATERIAL RATIONALISATION
Cl 26.6.18 of MOM of MRC-S&GPS COMMITTEE-MRC (S&GPS)
Rev. No. 07 Amd.No. Reaffirmed Prepared Issued Dt. of 1st Issue
Dt: 15.01.2004 Dt : Year : BHOPAL Corp. R&D AUGUST, 1976
v AA 102 08
CORPORATE PURCHASE SPECIFICATION Rev. No. 07
PAGE 1 OF 4
HOT ROLLED / FORGED CARBON STEEL BARS, Gr: 40 C8-NORMALISED
1.0 GENERAL
This specification governs the quality requirements of Hot Rolled / forged Carbon Steel Bars,
Normalised.
The Information on this document is the property of BHARAT HEAVY ELECTRICALS LIMITED
It must not be used directly or Indirectly in any way detrimental to the Interest of the company.
2.0 APPLICATION
Production of machined parts for general engineering purposes.
3.0 CONDITION OF DELIVERY
Hot Rolled / forged and Normalised.
Note: Sizes upto 100mm in hot rolled
COPYRIGHT AND CONFIDENTIAL
>100 to 180mm in hot rolled or forged
abov 180mm in forged.
Bars shall be supplied in straight lengths with ends square and true.
4.0 COMPLIANCE WITH NATIONAL STANDARDS:
Material shall comply with the requirements of the following National Standards and also
meet the requirements of this specification.
IS : 1570-Part II, Section 1-1979 : Schedule for wrought Steels-Carbon steels
Gr:40C8 (C40), Normalised : (Unalloyed Steels)
5.0 DIMENSION AND TOLERANCES
5.1 Sizes
Bars shall be supplied to the dimensions in BHEL order.
5.2 Length:
Unless otherwise specified, hot rolled bars shall be supplied in 3 to 6 metres length and
forged bars shall be supplied in lengths of 1.5 to 3 metres
Revisions :
APPROVED :
INTERPLANT MATERIAL RATIONALISATION
Cl 26.6.18 of MOM of MRC-S&GPS COMMITTEE-MRC (S&GPS)
Rev. No. 07 Amd.No. Reaffirmed Prepared Issued Dt. of 1st Issue
Dt: 15.01.2004 Dt : BHOPAL Corp. R&D AUGUST, 1976
Year :
AA 102 08
Rev. No. 07 CORPORATE PURCHASE SPECIFICATION
PAGE 2 OF 4
5.2 Tolerances:
5.2.1 For Forged bars: The tolerances shall be as per Cl 5.2.2 for bars ≤100mm.
The tolerances shall be +8 mm -0 mm for bars > 100 mm
5.2.2 Tolerances on hot rolled bars shall comply with those of Grade 2 of IS:3739: Dimensional
Tolerances for Carbon and Alloy Constructional Steel Products, reproduced below:
5.2.2.1 Round Square Bars:
---------------------------------------------------------------------------------------------------------------------------
Nominal Size mm Tolerances, mm
--------------------------------- ----------------------------------------------
Over Up to & Permissible Out of round /
Including deviation square
-----------------------------------------------------------------------------------------------------------------------------
-- 25 ± 0.50 0.50
25 50 ± 0.75 0.75
50 80 ± 1.00 1.00
80 100 ± 1.25 1.25
> 100 ± 1.6% of 75 % of total
diameter or tolerance (+ and -)
width of side
-----------------------------------------------------------------------------------------------------------------------------
5.2.2.2 Flats:
---------------------------------------------------------------------------------------------------------------------------
Nominal width, mm Tolerance, mm
Over Up to & On width On thickness
Including -----------------------------------------------
6 to 13 Over Over
13 to 25 25 to 50
including including
-----------------------------------------------------------------------------------------------------------------------
-- 50 ± 1.0 ± 0.5 ± 0.8 ± 1.0
50 100 ± 2.0 ± 0.5 ± 1.0 ± 1.5
100 150 ± 3.0 --- --- ± 2.0
________________________________________________________________________
5.2.3 Straightness:
Unless otherwise agreed to, the permissible deviation shall not exceed 5mm in any 1000mm
length.
6.0 MANUFACTURE:
Material shall be manufactured from fully killed steel.
AA 102 08
CORPORATE PURCHASE SPECIFICATION Rev. No. 07
PAGE 3 OF 4
7.0 FREEDOM FROM DEFECTS :
The bars shall be sound, straight and free from internal and surface defects such as
. seams, laps, cracks or any other defects which may impair the end use.
Bars shall be free from twists and bends.
8.0 HEAT TREATMENT :
The bars shall be normalised at a temperature of 830 - 8600C
9.0 CHEMICAL COMPOSITION :
The melt analysis of steel and the permissible variation in the composition of the material
from the melt analysis shall be as specified below :
___________________________________________________________________
Element Melt analysis, perecnt Permissible Variation, percent
Min. Max.
---------------------------------------------------------------------------------------------------------------
Carbon 0.35 0.45 + 0.02
Silicon 0.10 0.35 + 0.03
Manganese 0.60 0.90 + 0.04
Sulphur --- 0.035 + 0.005
Phosphorus --- 0.035 +0.005
__________________________________________________________________
10.0 TEST SAMPLES :
10.1 One sample shall be taken from each melt for chemical analysis.
10.2 One sample shall be taken from each heat treatment batch for testing of mechanical
properties. Test pieces for mechanical tests shall be taken in the longitudinal direction of the
piece.
10.3 For ruling section upto & including 40mm, the test piece shall be machined coaxially from the
test bars. For ruling section above 40mm the longitudinal axis shall be atleast 12.5 mm from
surface of the test bars.
Test methods for determining mechanical properties shall be as per IS:1608 (For tensile test).
11.0 MECHANICAL PROPERTIES (IN NORMALISED CONDITION) :
Mechanical properties of the material shall be as follows:
Tensile strength : 580 - 680 N/mm2
Yield strength : 320 N/mm2, min
Elongation on 5.65 √So : 18%, min.
AA 102 08
Rev. No. 07 CORPORATE PURCHASE SPECIFICATION
PAGE 4 OF 4
12.0 ULTRASONIC TEST:
12.1 Each bar above 100 mm shall be tested ultrasonically in accordance with BHEL standard
AA 085 01 18 to ensure freedom from internal defects. The norms of acceptance shall be as
per category 2 of the above standard.
12.2 Optional tests: If specified on order, each bar > 40 to 100mm shall be tested ultrasonically in
accordance with BHEL standard AA 085 01 18 to ensure freedom from internal defects and
the norms of acceptance shall be as per category 2.
13.0 TEST CERTIFICATES :
Three copies of test certificates shall be supplied, unless otherwise stated on the order.
In addition, the supplier shall ensure to enclose one copy of the test certificate along with their
despatch documents to facilitate quick clearance of the material.
The test certificate shall bear the following information :
AA 102 08; Rev. No. 07: Hot rolled /forged carbon steel bars, Gr.:40 Normalised
BHEL order No,
Supplier's Reference :
Name
Identification No.
Melt No.
Details of heat treatment.
Results of Tests :
Results of Dimensional inspection.
Results of chemical analysis, mechanical tests & Ultrasonic test.
14.0 PACKING AND MARKING :
The material shall be suitably packed in bundles-hessian wrapped to prevent sagging,
corrosion and damage during transit. A suitable clear temporary rust preventive shall be
applied on all the bars. Each bar of 50 mm and above shall be stamped with AA 102 08, melt
no, BHEL order no, at one end or on the end face.
Bars below 50mm shall be bundled together and tied with wire at 3 to 4 places along the
length of the bars.
A metal label shall be securely attached to each bundle and shall bear the following
information :
AA 102 08 : Hot Rolled / Forged Carbon Steel Bars, 40C8-Normalised.
BHEL Order No.
Consignment/Identification No.
Melt No.
Size and Weight.
Supplier's Name.
15.0 REFERRED STANDARDS (Latest Publications Including amendments):
1. IS : 1570 Part II 2. IS : 1608 3. IS : 3739 4. AA 085 01 18
