6140是什么材质?

2024-12-12 01:42:45
推荐回答(2个)
回答1:

材料牌号: 6140
标准: SSAE J1249 (2000) Former SAE standard and former SAE Ex-steels
国家与地区: USA
钢组: 结构钢
注释: This grade is no longer considered as a standard steel and was last listed as standard in the SAE Handbook in 1936.

回答2:

结构钢是什么钢?