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2507不銹鋼無縫管的化學成分及性能特點
日期：2025-12-25 01:49
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摘要：<p class="MsoNormal">
<span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼無縫管的化學成分及性能特點</span><o:p></o:p>
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<span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼無縫管是一種鐵素體</span><span style="font-family:Calibri;">-</span><span style="font-family:宋體;">奧氏體</span><span style="font-family:Calibri;">(</span><span style="font-family:宋體;">雙相</span><span style="font-family:Calibri;">)</span><span style="font-family:宋體;">不銹鋼化學成分（</span><span style="font-family:Calibri;">25Cr-7Ni-4Mo-0.27N</span><span style="font-family:宋體;">）</span><span style="font-family:Calibri;">2507 Stainless steel</span><span style="font-family:宋體;">，具有極好的抗點腐蝕</span><span style="font-family:Calibri;">,</span><span style="font-family:宋體;">縫隙腐蝕和均勻腐蝕的能力。</span><span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼無縫管</span><span style="font-family:宋體;">是一種鐵素體</span><span style="font-family:Calibri;">-</span><span style="font-family:宋體;">奧氏體</span><span style="font-family:Calibri;">(</span><span style="font-family:宋體;">雙相</span><span style="font-family:Calibri;">)</span><span style="font-family:宋體;">不銹鋼，它綜合了許多鐵素體鋼和奧氏體鋼*有益的性能</span><span style="font-family:Calibri;">, </span><span style="font-family:宋體;">由于該鋼鉻和鉬的含量都很高</span><span style="font-family:Calibri;">,</span><span style="font-family:宋體;">因此具有極好的抗點腐蝕，縫隙腐蝕和均勻腐蝕的能力。雙相顯微組織保證了該鋼具有很高的抗應力腐蝕破裂的能力，而且機械強度也很高。</span><o:p></o:p>
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<span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼無縫管的主要用途：</span><span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼應用于石油和天然氣工業；海上石破天油平臺</span><span style="font-family:Calibri;">(</span><span style="font-family:宋體;">熱交換器管，水處理和供水系統，消防系統</span><span style="font-family:Calibri;">,</span><span style="font-family:宋體;">噴水系統，穩水系統；石油化工設備；脫鹽</span><span style="font-family:Calibri;">(</span><span style="font-family:宋體;">淡化</span><span style="font-family:Calibri;">)</span><span style="font-family:宋體;">設備</span><span style="font-family:Calibri;">(</span><span style="font-family:宋體;">和設備中的高壓管，海水管</span><span style="font-family:Calibri;">)</span><span style="font-family:宋體;">；既需要高強度同時又需要高耐腐蝕性的機械和結構部件；燃</span><span style="font-family:Calibri;">(</span><span style="font-family:宋體;">廢</span><span style="font-family:Calibri;">)</span><span style="font-family:宋體;">氣凈化設備。</span><o:p></o:p>
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<span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼無縫管主要成分</span><span style="font-family:Calibri;">:25Cr-7Ni-4Mo-0.27N</span><o:p></o:p>
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<span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼無縫管各國標準對照</span><span style="font-family:Calibri;">:</span><o:p></o:p>
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<span style="font-family:Calibri;">ASTM/ASME: A240 - UNS S32750</span><o:p></o:p>
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<span style="font-family:Calibri;">EURONORM: 1.4410 - X2 Cr Ni MoN 25.7.4</span><o:p></o:p>
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<span style="font-family:Calibri;">AFNOR: Z3 CN 25.06 Az</span><o:p></o:p>
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<span style="font-family:Calibri;">DIN/EN</span><span style="font-family:宋體;">： </span><span style="font-family:Calibri;">1.4410</span><span style="font-family:宋體;">、</span><span style="font-family:Calibri;">ASME SA-240</span><o:p></o:p>
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<span style="font-family:Calibri;">GB: 25Cr-7Ni-4Mo-0.27N</span><o:p></o:p>
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抗腐蝕能力<o:p></o:p>
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<span style="font-family:Calibri;">1.</span><span style="font-family:宋體;">一般腐蝕：</span><o:p></o:p>
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<span style="font-family:Calibri;">SAF 2507</span><span style="font-family:宋體;">的較高的鉻及鉬含量使其對有機酸如甲酸、乙酸等具有較強的抗整體腐蝕的能力。</span><span style="font-family:Calibri;">SAF2507</span><span style="font-family:宋體;">合合金對無機酸，尤其是那些包含氯化物的無機酸也具有較強的抗腐蝕能力。</span><o:p></o:p>
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<span style="font-family:宋體;">和</span><span style="font-family:Calibri;">904L</span><span style="font-family:宋體;">相比，</span><span style="font-family:Calibri;">SAF2507</span><span style="font-family:宋體;">對稀釋的混有氯根離子的硫酸具有更強的抗腐蝕能力。</span><span style="font-family:Calibri;">904L</span><span style="font-family:宋體;">是奧氏體狀態的合金，專用于抗純硫酸腐蝕。</span><o:p></o:p>
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<span style="font-family:Calibri;">316L</span><span style="font-family:宋體;">等級不能用于鹽酸環境中，它可能會遭到局部腐蝕或整體腐蝕。</span><span style="font-family:Calibri;">SAF2507</span><span style="font-family:宋體;">可以用于稀釋的鹽酸環境里，具有較強的抗斑損及抗裂隙腐蝕的能力。</span><o:p></o:p>
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<span style="font-family:Calibri;">2.</span><span style="font-family:宋體;">晶間腐蝕：</span><o:p></o:p>
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<span style="font-family:Calibri;">nSAF 2507</span><span style="font-family:宋體;">較低的碳含量大大地降低了在熱處理時晶間中的碳化物沉淀的風險</span><span style="font-family:Calibri;">,</span><span style="font-family:宋體;">因此</span><span style="font-family:Calibri;">,</span><span style="font-family:宋體;">這個合金具有很強的抵抗與碳化物相關的晶間腐蝕的能力</span><span style="font-family:Calibri;">.</span><o:p></o:p>
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<span style="font-family:Calibri;">3.</span><span style="font-family:宋體;">應力腐蝕開裂：</span><o:p></o:p>
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<span style="font-family:Calibri;">SAF 2507</span><span style="font-family:宋體;">的復式結構使其具有較強的抗應力腐蝕開裂的能力。由于其較高的合金含量</span><span style="font-family:Calibri;">,SAF 2507</span><span style="font-family:宋體;">的抗腐蝕能力及強度均優于</span><span style="font-family:Calibri;">2205.</span><o:p></o:p>
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<span style="font-family:宋體;">裂縫在建筑等方面幾乎是不可避免的</span><span style="font-family:Calibri;">,</span><span style="font-family:宋體;">這使得不銹鋼在氯化物的環境里更易受到腐蝕</span><span style="font-family:Calibri;">.SAF 2507 </span><span style="font-family:宋體;">具有很強的抗裂縫腐蝕的能力</span><span style="font-family:Calibri;">.SAF 2507</span><span style="font-family:宋體;">在含有</span><span style="font-family:Calibri;">2000ppm</span><span style="font-family:宋體;">氯離子的硫酸中的等腐蝕曲線</span><span style="font-family:Calibri;">0.1 mm/year;</span><span style="font-family:宋體;">在鹽酸中的等腐蝕曲線</span><span style="font-family:Calibri;">0.1 mm/year.</span><o:p></o:p>
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<span style="font-family:宋體;">機械特性</span><span style="font-family:Calibri;">:SAF 2507</span><span style="font-family:宋體;">具有很高的耐壓強度、沖擊強度及較低的熱膨脹系數和較高的導熱性</span><span style="font-family:Calibri;">.</span><span style="font-family:宋體;">這些特性適用于很多結構零件及機械部件</span><span style="font-family:Calibri;">.SAF 2507</span><span style="font-family:宋體;">沖擊強度很高</span><span style="font-family:Calibri;">,</span><span style="font-family:宋體;">不宜長期置于高于</span><span style="font-family:Calibri;">570</span><span style="font-family:宋體;">°</span><span style="font-family:Calibri;">F</span><span style="font-family:宋體;">的溫度環境下</span><span style="font-family:Calibri;">,</span><span style="font-family:宋體;">這樣可能會減弱其韌性</span><span style="font-family:Calibri;">.</span><span style="font-family:宋體;">抗拉強度</span><span style="font-family:Calibri;">:</span><span style="font-family:宋體;">σ</span><span style="font-family:Calibri;">b</span><span style="font-family:宋體;">≥</span><span style="font-family:Calibri;">730Mpa;</span><span style="font-family:宋體;">延伸率</span><span style="font-family:Calibri;">:</span><span style="font-family:宋體;">δ≥</span><span style="font-family:Calibri;">20%</span><o:p></o:p>
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<span style="font-family:宋體;">配套焊材</span><span style="font-family:Calibri;">:ER2594</span><span style="font-family:宋體;">焊絲，</span><span style="font-family:Calibri;">E2594</span><span style="font-family:宋體;">焊條</span><o:p></o:p>
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<span style="font-family:宋體;">應用領域</span><span style="font-family:Calibri;">:</span><span style="font-family:宋體;">紙漿和造紙工業，海水淡化，煙氣凈化，熱交換器，化學品液貨船管道系統，海水系統等。</span><o:p></o:p>
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<span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼主要規格：</span><o:p></o:p>
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<span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼板材現貨規格</span><span style="font-family:Calibri;">:0.3mm-350mm(</span><span style="font-family:宋體;">厚度</span><span style="font-family:Calibri;">)</span><o:p></o:p>
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<span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼棒材現貨規格</span><span style="font-family:Calibri;">:3.0mm-500mm(</span><span style="font-family:宋體;">直徑</span><span style="font-family:Calibri;">)</span><o:p></o:p>
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<span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼線材現貨規格</span><span style="font-family:Calibri;">:0.1mm-20mm(</span><span style="font-family:宋體;">線徑</span><span style="font-family:Calibri;">)</span><o:p></o:p>
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<span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼的化學成分</span><span style="font-family:Calibri;">:</span><o:p></o:p>
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<span style="font-family:Calibri;">C</span><span style="font-family:宋體;">≤</span><span style="font-family:Calibri;">0.03 </span><span style="font-family:宋體;">、</span><span style="font-family:Calibri;">Si</span><span style="font-family:宋體;">≤</span><span style="font-family:Calibri;">0.80 </span><span style="font-family:宋體;">、</span><span style="font-family:Calibri;">Mn</span><span style="font-family:宋體;">≤</span><span style="font-family:Calibri;">1.2 </span><span style="font-family:宋體;">、</span><span style="font-family:Calibri;">Cr:24-26 </span><span style="font-family:宋體;">、</span><span style="font-family:Calibri;">Ni:6-8 </span><span style="font-family:宋體;">、</span><span style="font-family:Calibri;">S</span><span style="font-family:宋體;">≤</span><span style="font-family:Calibri;">0.02 </span><span style="font-family:宋體;">、</span><span style="font-family:Calibri;">P</span><span style="font-family:宋體;">≤</span><span style="font-family:Calibri;">0.035 </span><span style="font-family:宋體;">、</span><span style="font-family:Calibri;">Mo:3-5 </span><span style="font-family:宋體;">、</span><span style="font-family:Calibri;">N:0.24-0.32</span><o:p></o:p>
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<span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼無縫管在適宜固溶處理后，此鋼的顯微組織有比較理想的α</span><span style="font-family:Calibri;">/</span><span style="font-family:宋體;">γ之比約為</span><span style="font-family:Calibri;">50/50</span><span style="font-family:宋體;">的雙相結構。當固溶溫度在</span><span style="font-family:Calibri;">1050</span><span style="font-family:宋體;">℃以上時，隨溫度升高，鋼中鐵素體相數量會有所增加，但由于含氮量高，在</span><span style="font-family:Calibri;">1300</span><span style="font-family:宋體;">℃以下剛的相比例不會有顯著改變。此鋼若不經不同溫度時效</span><span style="font-family:Calibri;">(</span><span style="font-family:宋體;">或受熱的影響</span><span style="font-family:Calibri;">)</span><span style="font-family:宋體;">，在α</span><span style="font-family:Calibri;">+</span><span style="font-family:宋體;">γ基體上會有γ</span><span style="font-family:Calibri;">2</span><span style="font-family:宋體;">形成和δ、χ、</span><span style="font-family:Calibri;">R</span><span style="font-family:宋體;">、α</span><span style="font-family:Calibri;">`</span><span style="font-family:宋體;">金屬間相和</span><span style="font-family:Calibri;">Cr2N</span><span style="font-family:宋體;">等氧化物析出，由于鋼中的碳含量低</span><span style="font-family:Calibri;">(</span><span style="font-family:宋體;">一般在</span><span style="font-family:Calibri;">0.01%-0.02%)</span><span style="font-family:宋體;">，因此鋼中一般沒有碳化物存在。</span><o:p></o:p>
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<span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼無縫管產品的力學性能</span><span style="font-family:Calibri;">:</span><o:p></o:p>
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<span style="font-family:宋體;">一、</span><span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">不銹鋼無縫管的室溫力學性能</span><span style="font-family:Calibri;">:</span><o:p></o:p>
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<p class="MsoNormal">
<span style="font-family:宋體;">鋼材品種</span><span style="font-family:Calibri;">: </span><span style="font-family:宋體;">壁厚≤</span><span style="font-family:Calibri;">20mm ;</span><span style="font-family:宋體;">δ</span><span style="font-family:Calibri;">b/MPa:800-1000 </span><span style="font-family:宋體;">、δ</span><span style="font-family:Calibri;">0.2/MPa:</span><span style="font-family:宋體;">≥</span><span style="font-family:Calibri;">550 </span><span style="font-family:宋體;">、δ</span><span style="font-family:Calibri;">5/%:</span><span style="font-family:宋體;">≥</span><span style="font-family:Calibri;">25 </span><span style="font-family:宋體;">、硬度</span><span style="font-family:Calibri;">(HV):290</span><o:p></o:p>
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<span style="font-family:宋體;">二、</span><span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">雙相不銹鋼板在室溫</span><span style="font-family:Calibri;">--200</span><span style="font-family:宋體;">℃的力學性能</span><span style="font-family:Calibri;">:</span><o:p></o:p>
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<p class="MsoNormal">
<span style="font-family:宋體;">鋼材品種</span> 溫度<span style="font-family:Calibri;">/</span><span style="font-family:宋體;">℃ δ</span><span style="font-family:Calibri;">b/MPa</span><o:p></o:p>
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<span style="font-family:宋體;">室溫</span> ≥<span style="font-family:Calibri;">530</span><o:p></o:p>
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<span style="font-family:宋體;">板材</span> <span style="font-family:Calibri;">100 </span><span style="font-family:宋體;">≥</span><span style="font-family:Calibri;">450</span><o:p></o:p>
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<span style="font-family:Calibri;">200 </span><span style="font-family:宋體;">≥</span><span style="font-family:Calibri;">400</span><o:p></o:p>
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<span style="font-family:宋體;">三、</span><span style="font-family:Calibri;">2507</span><span style="font-family:宋體;">大口徑無縫管的力學性能</span><o:p></o:p>
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<span style="font-family:宋體;">外徑</span>×壁厚 δ<span style="font-family:Calibri;">b/MPa </span><span style="font-family:宋體;">δ</span><span style="font-family:Calibri;">0.2/MPa </span><span style="font-family:宋體;">δ</span><span style="font-family:Calibri;">5/% </span><span style="font-family:宋體;">硬度</span><span style="font-family:Calibri;">(HV)</span><o:p></o:p>
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<span style="font-family:Calibri;">273.0mm</span><span style="font-family:宋體;">×</span><span style="font-family:Calibri;">4.19mm 894 644 40 284</span><o:p></o:p>
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<span style="font-family:Calibri;">323.9mm</span><span style="font-family:宋體;">×</span><span style="font-family:Calibri;">4.57mm 858 662 45 270</span><o:p></o:p>
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<span style="font-family:Calibri;">406.4mm</span><span style="font-family:宋體;">×</span><span style="font-family:Calibri;">4.74mm 854 657 41 272</span><o:p></o:p>
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2507不銹鋼無縫管的化學成分及性能特點
2507不銹鋼無縫管是一種鐵素體-奧氏體(雙相)不銹鋼化學成分（25Cr-7Ni-4Mo-0.27N）2507 Stainless steel，具有極好的抗點腐蝕,縫隙腐蝕和均勻腐蝕的能力。2507不銹鋼無縫管是一種鐵素體-奧氏體(雙相)不銹鋼，它綜合了許多鐵素體鋼和奧氏體鋼*有益的性能, 由于該鋼鉻和鉬的含量都很高,因此具有極好的抗點腐蝕，縫隙腐蝕和均勻腐蝕的能力。雙相顯微組織保證了該鋼具有很高的抗應力腐蝕破裂的能力，而且機械強度也很高。
2507不銹鋼無縫管的主要用途：2507不銹鋼應用于石油和天然氣工業；海上石破天油平臺(熱交換器管，水處理和供水系統，消防系統,噴水系統，穩水系統；石油化工設備；脫鹽(淡化)設備(和設備中的高壓管，海水管)；既需要高強度同時又需要高耐腐蝕性的機械和結構部件；燃(廢)氣凈化設備。
2507不銹鋼無縫管主要成分:25Cr-7Ni-4Mo-0.27N
2507不銹鋼無縫管各國標準對照:
ASTM/ASME: A240 - UNS S32750
EURONORM: 1.4410 - X2 Cr Ni MoN 25.7.4
AFNOR: Z3 CN 25.06 Az
DIN/EN： 1.4410、ASME SA-240
GB: 25Cr-7Ni-4Mo-0.27N
抗腐蝕能力
1.一般腐蝕：
SAF 2507的較高的鉻及鉬含量使其對有機酸如甲酸、乙酸等具有較強的抗整體腐蝕的能力。SAF2507合合金對無機酸，尤其是那些包含氯化物的無機酸也具有較強的抗腐蝕能力。
和904L相比，SAF2507對稀釋的混有氯根離子的硫酸具有更強的抗腐蝕能力。904L是奧氏體狀態的合金，專用于抗純硫酸腐蝕。
316L等級不能用于鹽酸環境中，它可能會遭到局部腐蝕或整體腐蝕。SAF2507可以用于稀釋的鹽酸環境里，具有較強的抗斑損及抗裂隙腐蝕的能力。
2.晶間腐蝕：
nSAF 2507較低的碳含量大大地降低了在熱處理時晶間中的碳化物沉淀的風險,因此,這個合金具有很強的抵抗與碳化物相關的晶間腐蝕的能力.
3.應力腐蝕開裂：
SAF 2507的復式結構使其具有較強的抗應力腐蝕開裂的能力。由于其較高的合金含量,SAF 2507的抗腐蝕能力及強度均優于2205.
裂縫在建筑等方面幾乎是不可避免的,這使得不銹鋼在氯化物的環境里更易受到腐蝕.SAF 2507 具有很強的抗裂縫腐蝕的能力.SAF 2507在含有2000ppm氯離子的硫酸中的等腐蝕曲線0.1 mm/year;在鹽酸中的等腐蝕曲線0.1 mm/year.
機械特性:SAF 2507具有很高的耐壓強度、沖擊強度及較低的熱膨脹系數和較高的導熱性.這些特性適用于很多結構零件及機械部件.SAF 2507沖擊強度很高,不宜長期置于高于570°F的溫度環境下,這樣可能會減弱其韌性.抗拉強度:σb≥730Mpa;延伸率:δ≥20%
配套焊材:ER2594焊絲，E2594焊條
應用領域:紙漿和造紙工業，海水淡化，煙氣凈化，熱交換器，化學品液貨船管道系統，海水系統等。
2507不銹鋼主要規格：
2507不銹鋼板材現貨規格:0.3mm-350mm(厚度)
2507不銹鋼棒材現貨規格:3.0mm-500mm(直徑)
2507不銹鋼線材現貨規格:0.1mm-20mm(線徑)
2507不銹鋼的化學成分:
C≤0.03 、Si≤0.80 、Mn≤1.2 、Cr:24-26 、Ni:6-8 、S≤0.02 、P≤0.035 、Mo:3-5 、N:0.24-0.32
2507不銹鋼無縫管在適宜固溶處理后，此鋼的顯微組織有比較理想的α/γ之比約為50/50的雙相結構。當固溶溫度在1050℃以上時，隨溫度升高，鋼中鐵素體相數量會有所增加，但由于含氮量高，在1300℃以下剛的相比例不會有顯著改變。此鋼若不經不同溫度時效(或受熱的影響)，在α+γ基體上會有γ2形成和δ、χ、R、α`金屬間相和Cr2N等氧化物析出，由于鋼中的碳含量低(一般在0.01%-0.02%)，因此鋼中一般沒有碳化物存在。
2507不銹鋼無縫管產品的力學性能:
一、2507不銹鋼無縫管的室溫力學性能:
鋼材品種: 壁厚≤20mm ;δb/MPa:800-1000 、δ0.2/MPa:≥550 、δ5/%:≥25 、硬度(HV):290
二、2507雙相不銹鋼板在室溫--200℃的力學性能:
鋼材品種 溫度/℃ δb/MPa
室溫 ≥530
板材 100 ≥450
200 ≥400
三、2507大口徑無縫管的力學性能
外徑×壁厚 δb/MPa δ0.2/MPa δ5/% 硬度(HV)
273.0mm×4.19mm 894 644 40 284
323.9mm×4.57mm 858 662 45 270
406.4mm×4.74mm 854 657 41 272
