GB/T5223-2002 预应力钢绞丝技术要求

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GB/T5223-2002 预应力钢绞丝技术要求


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GB/T5223-2002 预应力钢绞丝技术要求：

GB/T5223-2002 预应力钢绞丝技术要求：

　

公称直径	允许偏差	抗拉强度不小于	规定非比例伸长应力不小于O_b	最大力下总伸长率不小于 Lo=200mm	弯曲次数次数/180^。弯曲半径不小于		松弛
Nominal diameter	Tolerance	Tensile strength no less than	off-proportion extrnsion stress no less than	Elongation no less than Lo=200mm	Bending Test		Relaxation
Nominal diameter	Tolerance	Tensile strength no less than	off-proportion extrnsion stress no less than	Elongation no less than Lo=200mm	Times/180^。no less than	Raidus	Initiale stress of tensile strength%	Losed stress 1000 houus no more than
(mm)	(mm)	(Mpa)	(Mpa)	(%)		(mm)
5.00	±0.05	1470 1570 1670 1770 1860	1290 1380 1470 1560 1640	3.5	4	15	70	2.5
6.00	±0.05	1470 1570 1670 1770	1290 1380 1470 1560	3.5	4	15	70	2.5
7.00	±0.05	1470 1570 1670 1770	1290 1380 1470 1560	3.5	4	20	70	2.5

　

螺旋肋公称尺寸：

　

公称直径	螺旋肋数量	基圆半径	外轮廓直径（D）	单肋尺寸宽度（a）	螺旋肋导程（C）
Nominal diameter	Rib No	Bask round Dia.	Outline Dia.	Single nb size Width(a)	Layer length
(mm)		(mm)	(mm)	(mm)
5.00	4	4.80±0.05	5.30±0.05	1.30-1.70	28-36
6.25	4	6.00±0.05	6.70±0.05	1.60-2.00	30-40
7.00	4	6.73±0.05	7.46±0.05	1.80-2.20	35-45

　

冷拉预应力钢丝技术要求：

　

公称直径	允许偏差	抗拉强度不小于	规定非比例伸长应力不小于O_b	最大力下总伸长率不小于 Lo=200mm	弯曲次数次数/180^。弯曲半径不小于		断面收缩率不小于	每210mm扭距的扭转次数不小于（次）	初始应力相当于70%公称抗拉强度时，1000h后应力松懈率不大于
Nominal diameter	Tolerance	Tensile strength no less than	off-proportion extrnsion stress no less than	Elongation no less than Lo=200mm	Bending Test		Reduction of area noless than	Torsion test Times/210mm torque noless than	As initial stress is 70% nominal tensile strength the stress relaxatrin after 1000h hours no more than
Nominal diameter	Tolerance	Tensile strength no less than	off-proportion extrnsion stress no less than	Elongation no less than Lo=200mm	Times/180^。 no less than	Raidus	Reduction of area noless than	Torsion test Times/210mm torque noless than
(mm)	(mm)	(Mpa)	(Mpa)	(%)		(mm)	%	n	r/%
4.00	±0.04	1470	1100	1.5	4	10	35	8	8
5.00	±0.05	1570	1180	1.5	4	15	35	8	8
6.00	±0.05	1670	1250	1.5	5	15	30	7	8
7.00	±0.05	1770	1330	1.5	5	20	30	6	8

　

　

　