美标材料
楼主正在参与一个美国小项目的投标，里面对材料标准的要求如下：Material Specifications:
Component Applicable Standard
Structural Plate/Steel/Shapes ASTM-A36 or ASTM A572 Grade 50
Structural Tube ASTM-A500 Grade B
Steel Pipe ASTM-A53 Grade B
Steel Sheet ASTM-A570, ASTM A569 or ASTM A653
Steel Plate ASTM-A514, ASTM 517
Hinge Pins ASTM-A311 Grades 1018 & 1144, or ASTM A576 Grade 1045
Bolts-Standard ASTM A307
Bolts-High Strength ASTM A325, SAE-J429 Grade 5 or 8, or ASTM A490
Glass ANSI Z97.1
Electrical and Electronic Components NFPA 70, NFPA 79, UL listed
问题有二：
1、国内能否比较容易的买到美标钢材，用量不大，型材加钢板总共四五百吨；
2、用国标同等级或高一等级钢材进行替代，怎样和业主方说明会有好的说服力？
望大侠们来聊一聊，多谢~
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