化學成分：碳C：0.43 ～0.48硅SI：0.15 ～0.35漫畫MN：0.70 ～0.90 sulfa s：允許剩余含量≤0.035磷phosphorus p：允許剩余含量≤0.035Chromium cr：0.70 Chromium cr：0.70 ni Ni ni ni：0.70 ni Ni ni：允許的鎳ni Ni ni：允許的鎳ni Ni ni：0.035 ≤永久0.030銅Cu：允許殘留含量≤0.030●機械性能：拉伸強度σb（MPA）：≥1030（105）列出強度σs（MPA）：≥835（85）（85）延伸δ5（％）δ5（％）：≥9節段捕獲縮寫縮寫捕獲縮寫縮寫縮寫捕獲量率ψ（％）：≥40沖擊Akv（j）：≥39沖擊韌性αKV（j/cm2）：≥49（5）：≤217Hb：≤217Hb：試樣試樣試樣黃金相組織：熱處理規格：淬火840°C，油冷卻；恢復520°C，水冷卻，油冷卻。

　　ASTM5145 plates can be called ASTM5145 steel plate, ASTM5145 steel plate, ASTM5145 roll plate, ASTM5145 open tablet, ASTM5145 band steel, ASTM5145 cold rolled board, ASTM5145 hot rolled plate, ASTM5145 medium plate, ASTM5145 thick board, ASTM5145 special thickness board, etc.本質

　　ASTM5145 rod can be called ASTM5145 round steel, ASTM5145 round steel, ASTM5145 disk circle, ASTM5145 wire, ASTM5145 silk material, ASTM5145 forging circle, ASTM5145 round rod, ASTM5145 hairy circle, ASTM5145 light circle, ASTM5145 , ASTM5145 hot -rolled round steel, ASTM5145滾動，ASTM5145冷拉圓鋼等。

　　ASTM5145 pipes can be called ASTM5145 steel pipes, ASTM5145 steel pipes, ASTM5145 seamless pipes, ASTM5145 seamless pipes, ASTM5145 welded pipes, ASTM5145 welded pipes, ASTM5145 precision pipes, ASTM5145 capacity pipes, etc.