| 牌號 | X6CrNiNb18-10 |
| 1.4550 | |
| 對應(yīng)標(biāo)準(zhǔn) | NF EN 10028-7-2000
壓力容器用不銹鋼扁平產(chǎn)品 Flat products made of steels for pressure purposes Part 7: Stainless steels |
| 歸類 | 奧氏體不銹鋼 |
| 標(biāo)簽 | 特殊等級 |
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高溫下的最小屈服強(qiáng)度
Material designation Heat treatment
conditionMinimum 0.2% proof strength Rp0.2,MPa
at a temperature (in°C) of:Name Number 100 150 200 250 300 350 400 450 500 550 600 X6CrNiNb18-10 1.4550 +AT 177 167 157 147 136 130 125 121 119 118 - Minimum 1.0% proof strength Rp1.0,MPa
at a temperature (in°C) of:100 150 200 250 300 350 400 450 500 550 600 211 196 186 177 167 161 156 152 149 147 - -
高溫下的最小抗拉強(qiáng)度
Material designation Minimum tensile strength Rm,MPa
at a temperature (in°C) of:Name Number 100 150 200 250 300 350 400 450 500 550 600 X6CrNiNb18-10 1.4550 435 400 370 350 340 335 330 320 310 300 - -
熱處理指南
Material designation Hot forming Heat
treatment
symbolSolution anneailing
①②Post weld heat
treatment
Stabilized steelsName Number Temperature
℃Type of
coolingTemperature
℃ ③④Type of
coolingTemperature
℃ ⑥Type of
coolingX6CrNiNb18-10 1.4550 1150 to 850 air +AT 1020 to 1120 water,air ⑤ 900 to 940 air ◎ a=air; o=oil; w=water.
◎ Scale and annealing colours produced during hot forming, heat treatment or welding may adversely affect the corrosion resistance. They should be removed as far as possible before use, e.g. by pickling.
◎ The temperatures of annealing should be agreed for simulated heat treated test pieces.
① The solution treatment may be omitted if the conditions for hot working and subsequent cooling are such that the requirements for the mechanical properties of the product and the resistance to intergranular corrosion as defined in EN ISO 3651-2 are obtained and provided these requirements are met even after appropriate subsequent solution annealing.
② Re-crystallizing annealing.
③ If heat treatment is carried out in a continuous furnace, the upper part of the range specified is usually preferred, or even exceeded.
④ The lower end of the range specified for solution annealing should be aimed at for heat treatment as part of further processing,because otherwise the mechanical properties might be affected. If the temperature of hot forming does not drop below the lower temperature for solution annealing.a temperature of 980℃ is adequate as a lower limit for Mo-free steels,a temperature of 1000℃ for steels with Mo contents up to 3% and a temperature of 1020℃ for steets with Mo contents exceeding 3%.
⑤ cooling sufficiently rapid.
⑥ Minimum holding time:30min.
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