Chemical & Mechanical Properties of Grade

For ordinary uses in Water, Gas and Air Lines Conforming to IS 1239 (Part-1) : 2004:

SPECIFICATION
GRADE
CHEMICAL COMPOSITION
MECHANICAL PROPERTIES
Carbon % Max
Maganese % Max
Sulphur % Max
Phosphorus % Max
Titanium % Max
Annealed
EI.% Min
HRB Max
x Eq. HV Max
HRC Max.
Eq. HV Max.
IS 7226
C-40
Medium Carbon
0.35-0.45
0.60- 0.90
0.15-0.35
0.04
0.04
83.4
160
28
290
C-50
Medium Carbon
0.50-0.60
0.50-0.65
0.15-0.35
0.04
0.04
85
165
35
350
C-70
High Carbon
0.65-0.70
0.50-0.80
0.15-0.35
0.04
0.04
87.9
175
35
350
C-80
High Carbon
0.75-0.85
0.50-0.80
0.15-0.35
0.04
0.04
91.6
190
35
350
SPECIFICATION
GRADE
CHEMICAL COMPOSITION
MECHANICAL PROPERTIES
Carbon % Max
Maganese % Max
Sulphur % Max
Phosphorus % Max
Titanium % Max
YS Mpa Max
 UTS Mpa Max
EI.% Min
HRC Max.
Eq. HV Max.
IS 513
260Y
Low carbon
0.08
0.6
0.025
0.5
0.02
260
350
26
28
300Y
Low carbon
0.1
0.9
0.025
0.5
0.02
300
380
24
26
340Y
Low Carbon
0.12
1.2
0.025
0.5
0.02
340
410
22
24
380Y
Low Carbon
0.12
1.2
0.025
0.5
0.02
380
450
20
22
420Y
Low Carbon
0.12
1.4
0.025
0.5
0.02
420
490
18
20
490Y
Low Carbon
0.16
1.65
0.025
0.5
0.02
490
550
14
16
550Y
Low Carbon
0.16
1.65
0.025
0.5
0.02
550
600
10
12
SPECIFICATION
GRADE
CHEMICAL COMPOSITION
MECHANICAL PROPERTIES
Carbon % Max
Maganese % Max
Sulphur % Max
Phosphorus % Max
Titanium % Max
Thickness MM
YS Mpa
UTS Mpa
EL% Min
EN 10130 D
DC 01
0.12
0.6
0.045
0.045
0.5-0.7
0.7-3.0
140-300
140-280
270-410
26
28
DC 03
0.1
0.45
0.035
0.035
0.5-0.7
0.7-3.0
140-260
140-240
270-370
32
34
DC 04
0.08
0.4
0.03
0.03
0.5-0.7
0.7-3.0
140-230
140-210
270-350
36
38
DC 05
0.06
0.35
0.025
0.025

0.5-0.7
0.7-3.0
140-200
140-180
270-330
38
40
DC 06
0.02
0.25
0.02
0.02
0.3
0.5-0.7
0.7-3.0
120-190
120-3.0
270-330
39
41
DC 07
0.01
0.2
0.02
0.02
0.2
0.5-0.7
0.7-3.0
100-170
100-150
250-310
42
44