法国 · AFNOR NF

S 550 Q

NF EN 10025-6 — 热轧结构钢产品 - 第6部分：平板产品的高屈服强度结构钢在淬火和回火状态下的交货技术条件。

化学成分

元素minmax相似备注
Al0.013The minimum grain-refining element content of 0The minimum grain-refining element content of 0
B0.006
C0.22
CEV0.65For product thickness t <= 50 mm; for product thickness 50 < t <= 100 mm CEV=0.77%; for product thickness 100 < t <= 150 mm CEV=0.83%.For product thickness t <= 50 mm; for product thickness 50 < t <= 100 mm CEV=0.77%; for product thickness 100 < t <= 150 mm CEV=0.83%.
Cr1.6
Cu0.55
Mn1.8
Mo0.74
N0.016
Nb0.07
Ni2.1
P0.03
S0.017
Si0.86
Ti0.07
V0.14
Zr0.17

力学性能

热处理 / 状态屈服强度抗拉强度伸长率断面收缩率冲击功硬度
厚板和宽扁钢  淬火和回火≥27 Charpy V Notch; -20°C; (trans.)；≥30 Charpy V Notch; 0°C; (trans.)；≥30 Charpy V Notch; -20°C; (long.)
厚板和宽扁钢  淬火和回火  > 100 <= 150 mm≥490 Yield stress is Upper Yield Stress (Reh)590–770≥16 Lo = 5≥40 Charpy V Notch; 0°C; (long.)
厚板和宽扁钢  淬火和回火  > 50 <= 100 mm≥530 Yield stress is Upper Yield Stress (Reh)640–820≥16 Lo = 5≥40 Charpy V Notch; 0°C; (long.)
厚板和宽扁钢  淬火和回火  >= 3 <= 50 mm≥550 Yield stress is Upper Yield Stress (Reh)640–820≥16 Lo = 5≥40 Charpy V Notch; 0°C; (long.)

高/低温力学性能

冲击功 Kv/Ku (J)
热处理 / 状态温度 ℃min备注
厚板和宽扁钢  淬火和回火-2027Charpy V Notch; trans.
厚板和宽扁钢  淬火和回火-2030Charpy V Notch; long.