母材纵向的屈服强度及其屈强比均有上升趋势；钢管母材横向和纵向抗拉强度都呈上升趋势。
The ultimate tensile strength(UTS) both in transverse and longitudinal of pipe body showed the trend for rising.
其弊端在于：（1）粉碎破坏了原料自身天然生成的力学性质，不能充分利用秸秆纵向抗拉强度较高的特点；
The shortcomings are as follows: (1) Crushing will destroy stalks' mechanics properties, the good quality of lengthwise tensile strength can not be made the best of;
其弊端在于：（1）粉碎破坏了原料自身天然生成的力学性质，不能充分利用秸秆纵向抗拉强度较高的特点；
The shortcomings are as follows: (1) Crushing will destroy stalks' mechanics properties, the good quality of lengthwise tensile strength can not be made the best of;
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