standard specification for gb 700

7/22/2019 Standard Specification for GB 700

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Eltel Middle East, Syria , Standard for Structural Steel Chinese Steel Specification

A) General Information :- Standard Specification for GB 700 Chinese

Select Specification Designation Product Form Alloy Group Title Notes ICS Number Status

GB 700-88 Grade Q195 bar, plate, str ip, shape carbon steel Carbon Structural Steels details 77.140.20 Current

GB 700-88 Grade Q215A bar, plate, str ip, shape carbon steel Carbon Structural Steels details 77.140.20 Current

GB 700-88 Grade Q215B bar, plate, str ip, shape carbon steel Carbon Structural Steels details 77.140.20 Current



GB 700-88 Grade Q235C bar, plate, str ip, shape carbon steel Carbon Structural Steels details 77.140.20 Current

GB 700-88 Grade Q235D bar, plate, str ip, shape carbon steel Carbon Structural Steels details 77.140.20 Current



GB 700-88 Grade Q275 bar, plate, str ip, shape carbon steel Carbon Structural Steels details 77.140.20 Current

B) Chemical Composition

Specification DesignationC Mn P S Si Cr Ni Cu N As Notes

GB 700-88 Grade Q195 0.06 - 0.12 0.25 - 0.50 0.045 max. 0.050 max. 0.30 max. 0.30 max. 0.30 max. 0.30 max. 0.008 max. 0.080 max. details

GB 700-88 Grade Q215A 0.09 - 0.15 0.25 - 0.55 0.045 max. 0.050 max. 0.30 max. 0.30 max. 0.30 max. 0.30 max. 0.008 max. 0.080 max. details

GB 700-88 Grade Q215B 0.09 - 0.15 0.25 - 0.55 0.045 max. 0.045 max. 0.30 max. 0.30 max. 0.30 max. 0.30 max. 0.008 max. 0.080 max. details



GB 700-88 Grade Q235C 0.18 max. 0.35 - 0.80 0.040 max. 0.040 max. 0.30 max. 0.30 max. 0.30 max. 0.30 max. 0.008 max. 0.080 max. details

GB 700-88 Grade Q235D 0.17 max. 0.35 - 0.80 0.035 max. 0.035 max. 0.30 max. 0.30 max. 0.30 max. 0.30 max. 0.008 max. 0.080 max. details

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GB 700-88 Grade Q275 0.28 - 0.38 0.50 - 0.80 0.045 max. 0.050 max. 0.35 max. 0.30 max. 0.30 max. 0.30 max. 0.008 max. 0.080 max. details

C) Mechanical Properties

Specification DesignationSection Thickness / Diameter (mm) Yield Strength (MPa) Tensile Strength (MPa) % Elongation Heat Treatment Notes

GB 700-88 Grade Q195 t 16 --- 315 - 390 33 min. hot-rolled, control-rolled, or normalized details

GB 700-88 Grade Q195 16 < t 40 --- 315 - 390 32 min. hot-rolled, control-rolled, or normalized details

GB 700-88 Grade Q195 t > 40 --- 315 - 390 --- hot-rolled, control-rolled, or normalized details

GB 700-88 Grade Q215A t 16 215 min. 335 - 410 31 min. hot-rolled or control-rolled details

GB 700-88 Grade Q215A 16 < t 40 205 min. 335 - 410 30 min. hot-rolled or control-rolled details




GB 700-88 Grade Q215A t > 150 165 min. 335 - 410 26 min. hot-rolled or control-rolled detailsGB 700-88 Grade Q215B t 16 215 min. 335 - 410 31 min. hot-rolled, control-rolled, or normalized details

GB 700-88 Grade Q215B 16 < t 40 205 min. 335 - 410 30 min. hot-rolled, control-rolled, or normalized details




GB 700-88 Grade Q215B t > 150 165 min. 335 - 410 26 min. hot-rolled, control-rolled, or normalized details





GB 700-88 Grade Q235A 100 < t 150 195 min. 375 - 460 22 min. hot-rolled or control-rolled detailsGB 700-88 Grade Q235A t > 150 185 min. 375 - 460 21 min. hot-rolled or control-rolled details

GB 700-88 Grade Q235B t 16 235 min. 375 - 460 26 min. hot-rolled, control-rolled, or normalized details






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GB 700-88 Grade Q235C t 16 235 min. 375 - 460 26 min. hot-rolled, control-rolled, or normalized details

GB 700-88 Grade Q235C 16 < t 40 225 min. 375 - 460 25 min. hot-rolled, control-rolled, or normalized details




GB 700-88 Grade Q235C t > 150 185 min. 375 - 460 21 min. hot-rolled, control-rolled, or normalized details

GB 700-88 Grade Q235D t 16 235 min. 375 - 460 26 min. hot-rolled, control-rolled, or normalized details

GB 700-88 Grade Q235D 16 < t 40 225 min. 375 - 460 25 min. hot-rolled, control-rolled, or normalized details


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Specification Designation Section Thickness / Diameter (mm) Yield Strength (MPa) Tensile Strength (MPa) % Elongation Heat Treatment Notes



GB 700-88 Grade Q235D t > 150 185 min. 375 - 460 21 min. hot-rolled, control-rolled, or normalized details






GB 700-88 Grade Q255A t > 150 205 min. 410 - 510 19 min. hot-rolled or control-rolled details

GB 700-88 Grade Q255B t 16 255 min. 410 - 510 24 min. hot-rolled, control-rolled, or normalized details






GB 700-88 Grade Q275 t 16 275 min. 490 - 610 20 min. hot-rolled, control-rolled, or normalized details

GB 700-88 Grade Q275 16 < t 40 265 min. 490 - 610 19 min. hot-rolled, control-rolled, or normalized details




GB 700-88 Grade Q275 t > 150 225 min. 490 - 610 15 min. hot-rolled, control-rolled, or normalized details

) Impact !est ata

Specification DesignationTest Piece

Absorbed Energy

Temp.

NotesJ

Avg C

GB 700-88 Grade Q215B L, V, F 27 20 details


GB 700-88 Grade Q235C L, V, F 27 0 details

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GB 700-88 Grade Q235D L, V, F 27 -20 details


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"ote for #$%& B:GB 700-88, Grade Q235B

The manganese content shall be up to 0.60% for rimmed steels.

The silicon content shall be less than or equal to 0.07% for rimmed steels, less than or equal to 0.17% for semi-killed steels, and greater than or equal to 0.12% for fully killedsteels.

The following residual element maximums are allowed: N 0.008% (for basic oxygen furnace steels), Cu 0.30%, Ni 0.30% and Cr 0.30%. If the manufacturer can guarantee thatresidual element content meets the specifications, analysis for these elements may be avoided.

For steels made from iron smelted from arsenic-containing minerals, the arsenic content shall be decided by agreement between the purchaser and the supplier. If there is noarsenic in the source materials, the arsenic analysis may be avoided.

If the steel meets the given mechanical property requirements, the listed minimums for carbon and manganese contents are not required for product delivery, but their contentsshall be reported in the quality certificate.

Chemical composition requirements may be applied to steel billets, including continuously cast feed/bloom, cast feed and the products made from them.

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A) 'i(h Stren(th lo allo* steel General Information

Select Specification Designation Product Form Alloy Group Title Notes ICS Number Status

GB/T 1591-94 Grade Q345A bar, plate, strip, shape carbon steel High Strength Low Alloy Structural Steels details 77.140.20 Current

GB/T 1591-94 Grade Q345B bar, plate, strip, shape carbon steel High Strength Low Alloy Structural Steels details 77.140.20 Current

GB/T 1591-94 Grade Q345C bar, plate, strip, shape carbon steel High Strength Low Alloy Structural Steels details 77.140.20 Current

GB/T 1591-94 Grade Q345D bar, plate, strip, shape carbon steel High Strength Low Alloy Structural Steels details 77.140.20 Current

GB/T 1591-94 Grade Q345E bar, plate, strip, shape carbon steel High Strength Low Alloy Structural Steels details 77.140.20 Current

GB/T 18982-2003 Grade Q345GNHJ plate, strip carbon steel Corrosion Resistant Steel Plates and Strips for Container details 77.140.50 Current

GB/T 18982-2003 Grade Q345GNHLJ plate, strip alloy steel Corrosion Resistant Steel Plates and Strips for Container details 77.140.50 Current

GB/T 3093-2002 Grade Q345A seamless tube carbon steel High-Pressure Seamless Steel Tubes for Diesel Engine details 77.140.75 Current

GB/T 3094-2000 Grade Q345 welded tube, seamless tube --- Cold Drawn Shaped Steel Tubes details 77.140.75 Current

GB/T 4171-2000 Grade Q345GNH plate, strip, shape carbon steel Superior Atmospheric Corrosion Resisting Structural Steel details 77.140.20 Current

GB/T 4171-2000 Grade Q345GNHL plate, strip, shape alloy steel Superior Atmospheric Corrosion Resisting Structural Steel details 77.140.20 Current

GB/T 8163-1999 Grade Q345 seamless tube carbon steel Seamless Steel Tubes for Liquid Service details 77.140.75 Current

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B) Chemical Composition

Specification DesignationC Mn P S Si Cr Ni V Al Cu Ti Nb Notes

GB/T 1591-94 Grade Q345A 0.20 max. 1.00 - 1.60 0.045 max. 0.045 max. 0.55 max. 0.30 max. 0.30 max. 0.02 - 0.15 --- 0.30 max. 0.02 - 0.20 0.015 - 0.060 details

GB/T 1591-94 Grade Q345B 0.20 max. 1.00 - 1.60 0.040 max. 0.040 max. 0.55 max. 0.30 max. 0.30 max. 0.02 - 0.15 --- 0.30 max. 0.02 - 0.20 0.015 - 0.060 details

Specification Designation C Mn P S Si Cr Ni V Al Cu Ti Nb Notes

GB/T 1591-94 Grade Q345C 0.20 max.1.00 -1.60

0.035max.

0.035max.

0.55 max. 0.30 max.0.30max.

0.02 -0.15

0.015min.

0.30 max. 0.02 - 0.200.015 -0.060

details

GB/T 1591-94 Grade Q345D 0.18 max.1.00 -1.60

0.030max.

0.030max.

0.55 max. 0.30 max.0.30max.

0.02 -0.15

0.015min.

0.30 max. 0.02 - 0.200.015 -0.060

details

GB/T 1591-94 Grade Q345E 0.18 max.1.00 -1.60

0.025max.

0.025max.

0.55 max. 0.30 max.0.30max.

0.02 -0.15

0.015min.

0.30 max. 0.02 - 0.200.015 -0.060

details

GB/T 18982-2003

GradeQ345GNHJ

0.12 max.0.20 -0.70

0.07 - 0.120.030max.

0.20 -0.50

--- --- --- ---0.25 -0.50

0.030max.

--- details

GB/T 18982-

2003

Grade

Q345GNHLJ0.12 max.

0.20 -

0.500.07 - 0.12

0.030

max.

0.25 -

0.75

0.30 -

1.25

0.65

max.--- ---

0.25 -

0.50--- --- details

GB/T 3093-2002 Grade Q345A 0.20 max.1.00 -1.60

0.030max.

0.030max.

0.55 max. 0.30 max.0.30max.

--- --- 0.20 max. --- --- ---

GB/T 3094-2000 Grade Q345 --- --- --- --- --- --- --- --- --- --- --- --- details

GB/T 4171-2000Grade

Q345GNH0.12 max.

0.50 -0.90

0.07 - 0.120.035max.

0.20 -0.60

--- --- --- ---0.25 -0.50

0.03 max. --- details

GB/T 4171-2000Grade

Q345GNHL0.12 max.

0.20 -0.50

0.07 - 0.150.035max.

0.25 -0.75

0.30 -1.25

0.65max.

--- ---0.25 -0.55

--- --- details

GB/T 8163-1999 Grade Q345 --- --- --- --- --- --- --- --- --- --- --- --- details

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C) Mechanical Properties

Specification Designation Section Thickness / Diameter(mm)

Yield Strength(MPa)

Tensile Strength(MPa)

%Elongation

Heat Treatment Notes

GB/T 1591-94Grade Q345A t 16 345 min. 470 - 630 21 min. hot rolled, control rolled, normalized, or normalized andtempered details

GB/T 1591-94 Grade Q345A 16 < t 35 325 min. 470 - 630 21 min.hot rolled, control rolled, normalized, or normalized andtempered

details


details


details

GB/T 1591-94Grade Q345B t 16 345 min. 470 - 630 21 min.hot rolled, control rolled, normalized, or normalized andtempered

details

GB/T 1591-94 Grade Q345B 16 < t 35 325 min. 470 - 630 21 min.hot rolled, control rolled, normalized, or normalized andtempered

details

GB/T 1591-94 Grade Q345B 35 < t 50

295 min. 470 - 630 21 min.

hot rolled, control rolled, normalized, or normalized and

tempered details

GB/T 1591-94 Grade Q345B 50 < t 100 275 min. 470 - 630 21 min.hot rolled, control rolled, normalized, or normalized andtempered

details

GB/T 1591-94Grade Q345C t 16 345 min. 470 - 630 22 min.hot rolled, control rolled, normalized, or normalized andtempered

details

9
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Specification DesignationSection Thickness / Diameter(mm)

Yield Strength(MPa)

Tensile Strength(MPa)

%Elongation

Heat Treatment Notes

GB/T 1591-94 Grade Q345C 16 < t 35 325 min. 470 - 630 22 min.hot rolled, control rolled, normalized, or normalizedand tempered

details

GB/T 1591-94 Grade Q345C 35 < t 50 295 min. 470 - 630 22 min.hot rolled, control rolled, normalized, or normalizedand tempered

details

GB/T 1591-94 Grade Q345C 50 < t 100 275 min. 470 - 630 22 min.hot rolled, control rolled, normalized, or normalizedand tempered details

GB/T 1591-94 Grade Q345D t 16 345 min. 470 - 630 22 min.hot rolled, control rolled, normalized, or normalizedand tempered

details

GB/T 1591-94 Grade Q345D 16 < t 35 325 min. 470 - 630 22 min.hot rolled, control rolled, normalized, or normalizedand tempered

details


details


details

GB/T 1591-94 Grade Q345E t 16 345 min. 470 - 630 22 min.hot rolled, control rolled, normalized, or normalizedand tempered

details

GB/T 1591-94 Grade Q345E 16 < t 35

325 min. 470 - 630 22 min.

hot rolled, control rolled, normalized, or normalized

and tempered details

GB/T 1591-94 Grade Q345E 35 < t 50 295 min. 470 - 630 22 min.hot rolled, control rolled, normalized, or normalizedand tempered

details

GB/T 1591-94 Grade Q345E 50 < t 100 275 min. 470 - 630 22 min.hot rolled, control rolled, normalized, or normalizedand tempered

details

GB/T 18982-2003

Grade Q345GNHJ --- 345 min. 480 min. (L) 24 min. (L) hot rolled ---

GB/T 18982-2003

GradeQ345GNHLJ

--- 345 min. 480 min. (L) 24 min. (L) hot rolled ---

GB/T 3093-2002 Grade Q345A --- 345 min. 470 - 630 22 min. cold drawn and heat treated details

GB/T 3094-2000 Grade Q345 --- 345 min. 510 min. 21 min. cold drawn details

GB/T 4171-2000 Grade Q345GNH t 16 345 min. 440 min. 22 min. hot-rolled, and control-rolled or normalized details

GB/T 4171-2000 Grade Q345GNHL t 2.5 320 min. 450 min. 26 min. cold-rolled, annealed details

GB/T 4171-2000 Grade Q345GNHL t 16 345 min. 480 min. 22 min. hot-rolled, and control-rolled or normalized details

GB/T 8163-1999 Grade Q345 t 16 325 min. 490 - 665 (L) 21 min. (L) heat treated details

GB/T 8163-1999 Grade Q345 t > 16 315 min. 490 - 665 (L) 21 min. (L) heat treated details

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) Impact !est ata

Specification Designation

Test Piece

Section Thickness

Absorbed Energy

Temp.

NotesJ

mm Avg C

GB/T 1591-94 Grade Q345B L, V, F --- 34 20 details

GB/T 1591-94 Grade Q345C L, V, F --- 34 0 details

GB/T 1591-94 Grade Q345D L, V, F --- 34 -20 details

GB/T 1591-94 Grade Q345E L, V, F --- 27 -40 details

GB/T 18982-2003 Grade Q345GNHJ L, V t 6 47 20 details

GB/T 18982-2003 Grade Q345GNHLJ L, V t 6 47 20 details

GB/T 4171-2000 Grade Q345GNH L, V --- 27 0 or -20 details

GB/T 4171-2000 Grade Q345GNHL L, V --- 27 0 or -20 details

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standard specification for gb 700

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