Description

Chemical  Requirements:
Analysis on cast. To be in accordance with table below
 

Required									For Information only Recomme ndation
C	Mn	Si	P	S	Cr	Mo	Ni	Al	H
0.4/0.*3	0.*5/1.*0	0.*5/0.*5	≤0.**5	≤0.**5	0.*0/1.*0	0.*5/0.*5	≤0.*5	0.*2/0.*5	≤2ppm
Note: Mn aim 0.9 min, P: 0.*1 min, S: 0.*1 min, Cr 0.*5 min, Mo: 0.*0 min, P+S: 0.*4 max.

 
Mechanical Properties Required :
On material at the time of supply.
 
-      Sampling:
Material shall be test per heat and per heat treat load, once Tensile and Three impact.
Test practice in accordance with ASTM A *****3 and ASTM A***4 CL BC, test specimens shall taken with the longitudinal axis located at 1” bellow surface.
 
 

Surface	Yield/Re 0.2% offset	Tensile/Rm	2” Elongation	Area Red.	Charpy V	Note
BHN	PSI	PSI	A %	Z %	Ft-lbs	1KSI=6.**5MPa
******1	**0,**0	**0,**0	≥*4	≥*5	*6 J	1ft-lbs=1.**6J
Report 0.6% eul for inform only
Surface hardness aiming for ******1 BHN
*5.4 MM sub surface cheking at least 4” or **2 mm from end of bar: ******0BHN, aiming for ******2BHN

 
General requirements:
 
Forging reduction ratio:≥4:1
Austenite grain: As per ASTM E***-latest, grade **8
Guarantee no crack, no flake, no shrnk hole, no pin hole
Mercury free: non radioactive, no welding. Decarburization is allowed for the RT and then QT bars.
Hardenability: as per ASTM A*****0, J*-J*2, testing is to be carried out in accordance with the ASTM A*****3 on speciments make from re- forged square or round samples ****5mm in diameter.
 
Non-metal inclusion: As per ASTM E**-latest method A:

	A Heavy	A Thin	B Heavy	B Thin	C Heavy	C Thin	D Heavy	D Thin
	2.0 max	2.0 max	1.5 max	2.0 max	1.0 max	1.5 max	1.0 max	1.5 max
Aim for	0.5 max	1.0 max	1.0 max	1.5 max	1.0 max	1.5 max	1.0 max	1.5 max

 
Surface condition: rough turned, required a surface finish of **0 RMS or better
 End hole: removed the ends holes.
 Dia. Tolerance: *0/*2mm.
 Out of roundness: within 1.9 mm. Straightness: max. 2mm/m.:≤1.9mm, 2mm/m.
 Forged Bars surface grinding allowed, Must not remove surface bellow nominal diameter.
 
 Material shall be untrasonic tested in accordance with ASTM A**8 4mm FBH.
 In accordance with API 6 A PSL 3 and EN ****8 Class 3, gu