40CRNI是中國標準中規定的合金結構鋼的車牌。自加州編號：A40402。

　　CR：0.45 ～0.75Ni：1.00 ～1.40抗拉力強度（σb/mpa）：≥980屈服點（σs/mpa）：≥785后伸長（Δ5/％）：≥10截面收縮率（ψ/%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%％; %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% ％，/%%）：≥45撞擊吸收（AKU2/J）：≥55貝什硬度（HBS100/3000）（退火或高溫恢復狀態）：≤241用于創建鍛造和冷st損傷和較大的橫截面大小。例如連桿，圓盤，曲柄軸，齒輪，軸，螺釘等。