GB709-1988热轧钢板和钢带的尺寸、外形、重量及允许尺寸偏差.pdf

中华人民共和国国家标准
UDC669.14-418
热轧钢板和钢带的尺寸、外形、重量
GB709-88
及允许偏差
代709-65
Dimensions, shape. weight and tolerances
for hot-rolled plates and sheets
本标准适用于宽度大于或等于600mm,厚度为0.35~200mm的热轧钢板和厚度为].2~25m
的钢带。本标准也适用于由宽钢带纵剪的窄钢带。
分类和代号
1.1按边缘状态分
切边
不切边
1.2按轧制精度分
较高精度
普通精度
B
定义
2.1钢板是平板状,矩形的,可直接轧制或由宽钢带剪切而成。
2.2钢带是指成卷交货,宽度大于或等于600m的宽钢带。
3尺寸
钢板尺寸应符合表1规定,钢带尺寸应符合表2的规定
钢板宽度也可为50mn或10mm倍数的任何尺寸。
钢板长度为100mm或50mm倍数的任何尺寸。但厚度小于等于4mm钢板的最小长度不得小于
1.2m,厚度大于4mm钢板的最小长度不得小于2m。
3.2根据需方要求,厚度小于30mm的钢板,厚度间隔可为0.5mm
3.3根据需方要求,经供需双方协议可以供应其他尺寸的钢板和钢带。
4尺寸偏差
4.1钢板和钢带厚度偏差应符合表3和表4的规定。
根据需方要求,可以供应等于允许公差带的限制负偏差的钢板。
中华人民共和国冶金工业部1988-02-15批准
989-(7-01实施
709-88
表
接下列板宽度的
钢板公称厚度
600」650700710」750180「850900950100100125014001420?1500
0.50,0.55,0.6120014001142014201500115001701800190012000
0.65,0.70,0.75120002001420?1420?1500?1500170181020
0.80,0.90
2001200142014201500150017001800190?1200
200020014201420?15001601700180019002000
0000000000000000
1.5,1.6,1,8
20002000200020002000200
200320002000
6006000060060000600660060600
2.0、2.2
200200000002020000
00120
600060
60000060060060600600600600600
200000200000200000100002
2.5,2.8
20002000
6006000000060600606006000060600
3.0,3.2,3.5
200020020020020020200200200200200200200
200012000
8,3.9
600060006000600600600060060060060600600
000200020020002000200020002020020002002001200
4.5,5
600060060060006006000600600600600606500
000200120002000200020002000200200
20020020020000020020000000
600600600060006000600160001600060001600160006000100
0020202002002
1,12
6000160016016006001200
2500250D12501250012500300
17;18,19,20
21,22,25
60653120020100100
26,28,30、32
250025002501300
1200012000120012000
70,·75,80,85
5001250030003000
00090009000900
185,190
GB709-88
m
最小和最大长度
1600170018e01900200021002200280024002500260612700128002900130013200134001360013800
600600
20200020
600080001600
000200012000
6000600016000
20U02U002000
6000600016000
2000(200020012000.2090
60006060016000600
8003040040
1200120120001201200012001200?1200?120001200
00030001300013000130001300300300400400
1200012001209?120001000000090090009000
300035040040040045004500145004001400350350013600
110001101000。10001000100090001900019000900019000138200{8200
3000350350046004000:40004500450040004100350013500350035001306320D3403650
1200120020020120012002001200100001000009019500:95009500
301350135001350035008503500135035035030030030030030012034613600360
0000000000000000ooo