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牌號(hào)
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X7CrNiAl 17-7不銹彈簧鋼絲
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德國(guó)W-Nr.
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1.4568
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對(duì)應(yīng)標(biāo)準(zhǔn)
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DIN EN 10270-3-2012
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機(jī)械彈簧鋼絲—第3部分：不銹彈簧鋼絲
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Steel wire for mechanical springs – Part 3: Stainless spring steel wire
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歸類(lèi)
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沉淀硬化型不銹鋼
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性能
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彈性 耐腐蝕
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X7CrNiAl17-7 化學(xué)元素成分含量(%)
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成分
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C
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Si
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Mn
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P
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S
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Cr
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Ni *
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Al
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最小值
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-
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-
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-
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-
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-
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16
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6.5
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0.7
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最DA值
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0.09
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0.7
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1
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0.04
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0.015
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18
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7.8
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1.5
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*為提高冷成形性能，可將鎳含量上限提高至8.30%
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X7CrNiAl17-7 機(jī)械性能
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直徑
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抗拉強(qiáng)度
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d
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σb
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mm
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ksi
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d ≤ 0.2
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1975~2280
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0.2 <d≤ 0.3
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1950~2250
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0.3<d≤ 0.4
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1925~2220
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0.4<d≤ 0.5
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1900~2190
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0.5<d≤ 0.65
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1850~2130
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0.65<d≤ 0.8
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1825~2100
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0.8<d≤ 1
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1800~2070
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1<d≤ 1.25
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1750~2020
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1.25<d≤ 1.5
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1700~1960
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1.5<d≤ 1.75
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1650~1900
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1.75<d≤ 2
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1600~1840
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2<d≤ 2.5
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1550~1790
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2.5<d≤ 3
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1500~1730
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3<d≤ 3.5
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1450~1670
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3.5<d≤ 4.25
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1400~1610
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4.25<d≤ 5
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1350~1560
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5<d≤ 6
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1300~1500
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6<d≤ 7
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1250~1440
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7<d≤ 8.5
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1250~1440
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8.5<d≤ 10
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1240~1440
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對(duì)于本牌號(hào)鋼絲制造的彈簧，其特性不僅取決于拉絲本身的特性，還取決于彈簧的熱處理(見(jiàn)A.2)。因此本牌號(hào)鋼在拉伸后通過(guò)熱處理來(lái)滿(mǎn)足機(jī)械性能。
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