BS 4360 HR STEEL FOR GENERAL ENGINEERING PURPOSE

Structural engineering / general engineering applications.
Used for building  / ships / rolling stock / petroleum storage tanks / containers other constructions which require superiority in weldability

 

BS Grade
 4360
(1979)		 Chemical Composition, max % Normal Deoxidant Condition Supply condition Yield Stress
min N/mm2		 Tensile
Strength
N/mm2		 Elongation, min % Charpy V-notch Impact test
C Si Mn P S NbV =<16mm >16mm =<20mm G L=200 mm
(10)		 G L=
5.65VSo		 Temp
0C		 Energy
min average
J		 Thickness
max min
40A
(4) (11)		 0.22
(0.27)		 0.50
(0.55)		 1.60
(1.70)		 0.050
(0.060)		 0.050
(0.060)		 -
-		 Semi-Killed or Killed As rolled - - 400-480 22 25 - - -
43A
(4)		 0.25
(0.30)		 0.50
(0.55)		 1.60
(1.70)		 0.050
(0.060)		 0.050
(0.060)		 -
-		 Semi-Killed or Killed As rolled 245 240 430-510 20 22 - - -
50C
(3-4-5)		 0.20
(0.24)		 0.50
(0.55)		 1.50
(1.60)		 0.050
(0.060)		 0.050
(0.060)		 Nb
0.003~0.10
V0.003~0.10
Nb+V<0.10		 Semi-Killed or Killed

< 12.5 mm as rolled
 >=12.5mm  normalized

 355 345
(35.2)		 490-620 18 20 -5 41 75
-15 27
55C
(3-4-5)		 0.22
(0.26)		 0.60
(0.65)		 1.60
(1.70)		 0.040
(0.050)		 0.040
(0.050)		 Nb
0.003~0.10
V0.003~020
Nb+V<0.15		 Semi-Killed or Killed As rolled < 16mm >16mm
<25mm		 550-700 17 19 0 27 19
450 430


 

Remarks
1) Chemical composition ( ):product.
2) The steel may be supplied with Al, Nb or V. if grain refining elements other than Al, Nb or V are used,
    the manufacturer shall inform the purchaser.
3) These grades may also be supplied containing either  0.20/0.35  or 0.35/0.50% Cu, if specified.
4) Max C equivalent value.
   If agreed between the manufacturer and the purchaser,
   the following grades shall be supplied with a C equivalent value.
Grade C E V max Grade C E V max
50C 0.45** 55C 0.51

** 0.47% for plates >16mm
* if copper addition is specified, 0.02% shall be added to the permitted max C equivalent value specified above
C E = C + MN + Cr + Mo + V + Ni + Cu
                  6               5            15
5) For material in 50c over 10mm thick a max C of 0.22% is permitted.
6) For material 50 C over 16mm thick a max C of  0.20% is permitted.
7) For material 50C, C and Mn may be varied on the basis of an increase of 0.06% Mn for each .
    decrease of 0.01% C or vice versa up to a max Mn of 1.60% and a max C of 0.22% for 50C & 55C.
8) May be water-quenched and tempered.
9) Up to and including 5mm thick 16% for 40A, and 15% for 55C.
10) For material < 6mm thick tensile strength and elongation tests not required.
11) Only if specified.
12) Min yield strength 230N/mm2 for material < 19mm thick.
13) Min yield strength 245N/mm2 for material < 19mm thick.