 |
| Specific Requirements for the Chemical Composition
and mechanical Properties of weldable structural steel plate (General) -
Section 4 - BS 7191: 1989 |
| |
Chemical Composition |
| Grade |
C
Max |
Si |
Mn |
S
Max |
P
Max |
Cr
Max |
Mo
Max |
Nb |
V |
Ti
Max |
Ni
Max |
Cu
Max |
Ai(Total)
Max |
N
Max |
Cr+Mo+Ni+Cu
Max |
Nb+V
Max |
Nb+V+Ti Max |
Normal
Supply
Condition |
| |
% |
% |
% |
% |
% |
% |
% |
% |
% |
% |
% |
% |
% |
% |
% |
% |
% |
|
| 275D |
0.16 |
0.50 Max |
1.50 Max |
0.040 |
0.040 |
- |
- |
0.003/0.10 |
0.003/0.10 |
- |
- |
- |
- |
- |
- |
|
- |
Normalized |
| 275E |
0.16 |
0.10/0.50 |
1.50 Max |
0.030 |
0.030 |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
Normalized |
| 275EZ |
0.16 |
0.10/0.50 |
1.50 Max |
0.008 |
0.025 |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
Normalized |
| 355D (3/5) |
0.18 (4) |
0.10/0.50 |
1.50 Max (5) |
0.040 |
0.040 |
- |
- |
0.003/0.10 |
0.003/0.10 |
- |
- |
- |
- |
- |
- |
0.10 |
- |
Normalized |
| 355D (3/5) |
0.18 (4) |
0.10/0.50 |
1.50 Max (5) |
0.030 |
0.040 |
- |
- |
0.003/0.10 |
0.003/0.10 |
- |
- |
- |
- |
- |
- |
0.15 |
- |
Normalized |
| 355EM (6) |
0.15 |
0.25/0.55 |
1.00/1.65 |
0.015 |
0.025 |
0.25 |
0.08 |
0.04 Max |
0.015 Max |
0.02 |
0.45 |
0.30 |
0.055 (7) |
0.010 (7) |
0.80 |
- |
- |
Normalized |
| 355EMZ (6) |
0.15 |
0.25/0.55 |
1.00/1.65 |
0.008 |
0.025 |
0.25 |
0.08 |
0.04 Max |
0.015 Max |
0.02 |
0.45 |
0.30 |
0.055 (7) |
0.010 (7) |
0.80 |
- |
- |
Normalized |
| 450EM (6) |
0.16 |
0.25/0.60 |
1.00/1.65 |
0.015 |
0.025 |
0.30 |
0.25 |
0.03 Max |
0.08 Max |
0.02 |
0.65 |
0.30 |
0.055 (7) |
0.010 (7) |
0.80 |
0.10 |
0.12 |
Quenched & Tempered |
| 450EMZ (6) |
0.16 |
0.25/0.60 |
1.00/1.65 |
0.008 |
0.025 |
0.30 |
0.25 |
0.03 Max |
0.08 Max |
0.02 |
0.65 |
0.30 |
0.055 (7) |
0.010 (7) |
0.80 |
0.10 |
0.12 |
Quenched & Tempered |
(1) The chemical compositions
apply to the following:
(a) Ladle only in the case of grades 275D, 275E, 275EZ, 355D, 355E
(b) Ladle and products in the case of grades 355EM, 355EMZ, 450EM, 450EMZ
(2) For alternative supply conditions see clause 6
(3) Steels may be supplied with no niobium or vanadium. If grain refining
elements other than aluminium, niobium or vanadium are used, the manufacturer
shall inform the purchaser at the time of enquiry and order.
(4) For grades 355D and 355E over 16mm thick a maximum carbon content of
0.20% for ladle is permitted.
(5) The carbon and manganese content may be varied (Ladle analysis) for
grades 355D and 355E on the basis of 0.06% manganese content for each decrease
of 0.01% carbon or vice versa up to a maximum manganese content of 1.60%
and a maximum carbon content of 0.20%.
(6) The levels of residual elements arsenic, tin, lead, bismuth and calcium
shall not exceed 0.005% Ca, 0.01% for Sn and 0.02% for As. Boron (B) shall
not exceed 0.0005%
These elements shall be reported as ladle analysis only and shall be checked
once every 5000t at manufacturing location
(7) The soluble aluminium to nitorgen ratio shall be a minimum of 2:1. Soluble
aluminium content is defined as 0.005% less than the total aluminium content.
|
| Specific Requirements for the Chemical Composition
and mechanical Properties of weldable structural steel plate (Mechanical
Properties for plates [Figures in parenthesis refer to the notes following
this table]) - Section 4 - BS 7191: 1989 |
| |
Minimum Yield Strength, Re for thickness (in
mm) |
Minimum elongation, A on gauge length of (1) |
Min Average Charpy V notch impact test Value
(2) |
| Tensile Strength Rm (1) |
Up to and including 16 |
Over 16 up to and including 20 |
Over 20 up to and including 40 |
Over 40 up to and including 63 |
Over 63 up to and including 100 |
Over 100 up to and including 120 |
Over 120 up to and including 150 |
80mm (3) |
200mm (4) |
5.65'So |
Temp |
Energy Min Value |
Thickness |
Grade |
| |
Nmm² (5) |
Nmm² (5) |
Nmm² (5) |
Nmm² (5) |
Nmm² (5) |
Nmm² (5) |
Nmm² (5) |
% |
% |
% |
°C |
J |
mm |
|
| 430/580 |
275 |
265 |
- |
- |
- |
- |
- |
23 |
20 |
22 |
-20 |
40 |
20 |
275D |
| 430/580 |
275 |
265 |
265 |
- |
- |
- |
- |
23 |
20 |
22 |
-40 |
40 |
40 |
275E |
| 430/580 |
275 |
265 |
265 |
- |
- |
- |
- |
23 |
20 |
22 |
-40 |
40 |
40 |
275EZ |
| 490/640 |
355 |
345 |
- |
- |
- |
- |
- |
20 |
18 |
20 |
-20 |
50 |
20 |
355D |
| 490/640 |
355 |
345 |
345 |
- |
- |
- |
- |
20 |
18 |
20 |
-40 |
50 |
40 |
355E |
| 490/640 |
355 |
345 |
345 |
340 |
325 |
315 |
305 |
20 |
18 |
20 |
-40 |
50 |
150 |
355EM |
| 490/640 |
355 |
345 |
345 |
340 |
325 |
315 |
305 |
20 |
18 |
20 |
- |
50 |
150 |
355EMZ |
| |
Up to and including 16 |
Over 16 up to and including 25 |
Over 25 up to and including 75 |
|
|
|
|
|
|
|
|
|
|
|
| 550/700 |
450 |
430 |
415 |
- |
- |
- |
- |
19 |
17 |
19 |
-40 |
60 |
75 |
450EM |
| 550/700 |
450 |
430 |
415 |
- |
- |
- |
- |
19 |
17 |
19 |
-40 |
60 |
75 |
450EMZ |
(1) Charpy tensile strength
and elongation values apply to the maximum thickness for which the minimum
yield strength values are specified
(2) For the charpy V-notch test, mid thickness tests are also required when
thickness is over 40mm. In the case of piling material, the mid thickness
impacts will be carried out at -30°C instead of -40°C
(3) Up to and including 9mm thick: 17% for grades 275D, 275E, and 275EZ
and 16% for grades 355D, 355E, 355EMZ, 450EM and 450EMZ
(4) Up to and including 9mm thick: 16% for grades 275D, 275E, and 275EZ
and 15% for grades 355D, 355E, 355EMZ, 450EM and 450EMZ
(5) 1 Nmm² = 1 MPa |