25MnTiBRE steel chemical composition Q345B Changed to GBT 11251 25MnTiBRE steel Specs MS steel plate gbt 11251 25mntibre steel chemical element. GB 11251 Grade 30CrMnSiA Steel Matmatch. high purity Alloy steel 4140, 4130, 4145H, 4330. Inquiry Us.GB/T 11251 20Cr hot rolled structure steel plates can also be used in quenching and tempering condition to manufacture parts with larger working speed and medium impact load.
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