Specification for supply of welded high strength structural steel HG785
焊接高强度结构用钢HG785供货技术条件
WJX (RZ) 159-2005
Name: welded high strength structural steel
Designation: HG785 Delivery status: hot rolled
This Specification replaces WJX (RZ) 159-2003
1. Scope of application
This Specification is applicable to welded high strength structural steel with thickness of 5 ~ 16 mm.
2. Normative references
GB 222 Method of sampling steel for determination of chemical composition and permissible variations for product analysis
GB 223 Methods for chemical analysis of iron, steel and alloy
GB 228 Metallic materials - Tensile testing
GB 247 General rule of package, mark and certification for steel plates ( sheets) and strips
GB 3274 Hot-rolled plates and strips of carbon structural steels and high strength low alloy structural steels
JB 4159 Metal Charpy (V-notch) low temperature impact test method
3. Chemical composition
The chemical composition of the steel shall meet the requirements of the table below:
Designation Test items Expression of results Results or measured values
Minimum Minimum
HG785 C
Si
Mn
P
S
Mo
Cr
Ni
Nb
B %
%
%
%
%
%
%
%
%
% /
0.15
0.80
/
/
0.10
0.10
/
0.02
/ 0.15
0.40
2.00
0.030
0.015
0.60
0.60
0.80
0.08
0.005
Note: other minor alloying elements can be added if necessary.
4. Mechanical properties
The mechanical properties of the steel shall be in accordance with those specified in the table below:
Designation Test items Expression of results Results or measured values
Minimum Minimum
HG785D
HG785E ReL
Rm
A50
180°cold bending
Impact energy at -20℃
Impact energy at -40℃ MPa
MPa
%
d=3a
J
J 685
785
15
Intact
40
27 /
/
/
/
/
/
Notes:
1) Sampling direction: transverse for tensile and cold bending samples, and longitudinal for impact samples;
2) Sampling position: 1/4 of the plate width. For steel plates with thickness ≥30mm, the center line of the sample is at 1/4 of the plate thickness, and there is no requirement for other plate thicknesses;
3) The impact energy and test temperature for Charpy (V-notch) impact test shall meet the requirements of the table above. The impact energy shall be calculated according to the arithmetic average of 3 specimens; it is acceptable that one of the specimen results is small, but shall not be less than 70% of the specified value;
4) There is no requirement for the impact energy of steel plates with thickness < 6mm. The impact specimen size of steel plate with thickness ≥ 6 ~ 7 mm is 5×10×55 (mm), that of steel plate with thickness ≥ 8 ~ 10 mm is 7.5×10×55 (mm), and that of steel plate with thickness ≥8~10mm is 10× 10× 55 (mm). For small size samples, the specified value of impact energy decreases proportionally.
WJX(RZ)159-2005 Specification for supply of welded high strength structural steel HG785 (English Version)
Standard No.
WJX(RZ)159-2005
Status
valid
Language
English
File Format
PDF
Word Count
600 words
Price(USD)
30.0
Implemented on
Delivery
via email in 1 business day
Detail of WJX(RZ)159-2005
Standard No.
WJX(RZ)159-2005
English Name
Specification for supply of welded high strength structural steel HG785
Chinese Name
焊接高强度结构用钢 HG 785 供货技术条件
Chinese Classification
Professional Classification
WJ
ICS Classification
Issued by
Issued on
Implemented on
Status
valid
Superseded by
Superseded on
Abolished on
Superseding
Language
English
File Format
PDF
Word Count
600 words
Price(USD)
30.0
Keywords
WJX(RZ)159-2005, , WJX(RZ)159-2005, WJX(RZ)159,
Introduction of WJX(RZ)159-2005
Specification for supply of welded high strength structural steel HG785
焊接高强度结构用钢HG785供货技术条件
WJX (RZ) 159-2005
Name: welded high strength structural steel
Designation: HG785 Delivery status: hot rolled
This Specification replaces WJX (RZ) 159-2003
1. Scope of application
This Specification is applicable to welded high strength structural steel with thickness of 5 ~ 16 mm.
2. Normative references
GB 222 Method of sampling steel for determination of chemical composition and permissible variations for product analysis
GB 223 Methods for chemical analysis of iron, steel and alloy
GB 228 Metallic materials - Tensile testing
GB 247 General rule of package, mark and certification for steel plates ( sheets) and strips
GB 3274 Hot-rolled plates and strips of carbon structural steels and high strength low alloy structural steels
JB 4159 Metal Charpy (V-notch) low temperature impact test method
3. Chemical composition
The chemical composition of the steel shall meet the requirements of the table below:
Designation Test items Expression of results Results or measured values
Minimum Minimum
HG785 C
Si
Mn
P
S
Mo
Cr
Ni
Nb
B %
%
%
%
%
%
%
%
%
% /
0.15
0.80
/
/
0.10
0.10
/
0.02
/ 0.15
0.40
2.00
0.030
0.015
0.60
0.60
0.80
0.08
0.005
Note: other minor alloying elements can be added if necessary.
4. Mechanical properties
The mechanical properties of the steel shall be in accordance with those specified in the table below:
Designation Test items Expression of results Results or measured values
Minimum Minimum
HG785D
HG785E ReL
Rm
A50
180°cold bending
Impact energy at -20℃
Impact energy at -40℃ MPa
MPa
%
d=3a
J
J 685
785
15
Intact
40
27 /
/
/
/
/
/
Notes:
1) Sampling direction: transverse for tensile and cold bending samples, and longitudinal for impact samples;
2) Sampling position: 1/4 of the plate width. For steel plates with thickness ≥30mm, the center line of the sample is at 1/4 of the plate thickness, and there is no requirement for other plate thicknesses;
3) The impact energy and test temperature for Charpy (V-notch) impact test shall meet the requirements of the table above. The impact energy shall be calculated according to the arithmetic average of 3 specimens; it is acceptable that one of the specimen results is small, but shall not be less than 70% of the specified value;
4) There is no requirement for the impact energy of steel plates with thickness < 6mm. The impact specimen size of steel plate with thickness ≥ 6 ~ 7 mm is 5×10×55 (mm), that of steel plate with thickness ≥ 8 ~ 10 mm is 7.5×10×55 (mm), and that of steel plate with thickness ≥8~10mm is 10× 10× 55 (mm). For small size samples, the specified value of impact energy decreases proportionally.
