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8×25Fi+FC
825Fi + FC is 8 strands of 25 wires (filled dense structure) + fiber core, the wire contacts the wire rope, focusing on high flexibility and cost economy, in line with GB/T 20118-2017 "Wire Rope General Technology"
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8×25Fi+FC 是 8 股 ×25 丝（填充式密实结构）+ 纤维芯 的线接触钢丝绳，主打高柔韧性与成本经济性，符合 GB/T 20118-2017《钢丝绳通用技术条件》、EN 12385-4 标准，适用于中型起重机副钩、建筑卷扬机、港口辅助装卸、矿山斜井辅助运输等中轻载且需频繁弯曲的工况。
一、基础结构参数
参数项 详细说明 结构组成 8 个外层股 + 纤维芯（FC，材质多为聚丙烯或剑麻）；每股 25 丝，采用填充式（Fi）密实排列，股内主钢丝间隙填充细钢丝，无空隙，线接触受力均匀；纤维芯提升绳体柔韧性 钢丝材质 优质碳素结构钢（#60、#70、#72A），冷拔强化处理；表面可选光面、热镀锌、电镀锌 表面处理 1. 光面：无镀层，适用于干燥无尘的室内工况2. 电镀锌：薄镀层（8~15μm），装饰性防锈，轻度潮湿环境可用3. 热镀锌：厚镀层（30~60μm），强耐腐蚀，适用于户外 / 沿海 / 矿山腐蚀环境 直径范围 常见 14~48mm，主流应用 20~40mm 中轻载提升场景 公称抗拉强度 碳钢型：1570MPa、1770MPa、1960MPa（工业常用 1770MPa 等级） 捻向 右同向捻（RHRL）、左同向捻（LHLL）、右交互捻（RHRH）；8 股对称结构抗旋转性优于 6 股绳 重量系数 0.370~0.390（FC 芯参考值；热镀锌后重量增加 3%~5%） 最小破断拉力系数 0.335~0.350（比同结构 IWRC 芯低 10%~12%） 二、典型力学性能表
1. 碳钢型（1770MPa，光面）
公称直径（mm） 参考重量（kg/100m） 最小破断拉力（kN） 适用场景 20 148 205 小型卷扬机、建筑施工电梯牵引 28 290 395 塔吊副钩、港口龙门吊辅助钩 36 488 675 中型履带吊副钩、风电塔筒辅助吊装 44 728 1010 大型起重机辅助钩、预制构件搬运 2. 碳钢型（1770MPa，热镀锌）
公称直径（mm） 参考重量（kg/100m） 最小破断拉力（kN） 适用场景 20 153 200 户外建筑卷扬机、潮湿环境吊装 28 300 385 沿海港口辅助装卸、矿山斜井运输 36 502 660 海上平台轻型牵引、化工园区物料吊装 注：热镀锌处理后破断拉力比光面低 1%~2%；抗拉强度提升至 1960MPa 时，破断拉力约增加 11%~13%；纤维芯受潮易腐烂，需定期涂抹润滑脂防潮。三、核心特性
- 柔韧性优异纤维芯（FC）替代钢绳芯，弯曲半径比同规格 IWRC 芯小 15%~20%，能适配更小直径的卷筒和滑轮，缠绕收放更顺畅，尤其适合频繁弯曲的中轻载作业。
- 结构密实耐磨损填充式股结构消除了钢丝间隙，线接触设计让受力均匀，反复起升下放时钢丝间摩擦损耗小，不易出现断丝、股松散问题，使用寿命比普通点接触纤维芯钢丝绳长 25%~35%。
- 抗旋转性较好8 股对称分布的结构可抵消部分旋转力矩，作业时吊物扭转幅度小，避免因旋转导致的载荷偏移，适配长距离提升或下放的工况。
- 成本经济性价比高纤维芯原材料成本低，同等规格下价格比 8×25Fi+IWRC 低 15%~20%，是中轻载工况的高性价比选择。
四、选型与使用要点
- 安全系数选择
- 中轻载起重 / 建筑吊装：4~5 倍
- 矿山辅助运输 / 港口辅助装卸：5~6 倍
- 严禁用于载人设备、重载提升及高危作业场景
- 环境适配原则
- 干燥室内 → 光面碳钢绳
- 普通户外 → 热镀锌碳钢绳
- 沿海 / 酸碱腐蚀环境 → 热镀锌高防腐型号，缩短维护周期
- 卷筒与滑轮匹配
- 卷筒直径 ≥ 钢丝绳直径的 16~20 倍
- 滑轮直径 ≥ 钢丝绳直径的 14~18 倍
- 避免小直径卷筒过度弯曲，防止股内填充钢丝脱落或纤维芯损坏
- 维护注意事项
- 定期涂抹钢丝绳专用润滑脂，既减少钢丝磨损，又能防止纤维芯受潮腐烂
- 检查时重点关注股间断丝、绳体鼓包情况，出现单股 2 丝以上断丝需及时评估报废
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common problem
Q
What kind of lubricant can prevent wire rope damage?
A
First, the smooth oil has good fluidity and soaking ability, allowing it to quickly enter the inside of the rope and the rope core when the wire rope is smooth pretreated, and can play a role in preventing bacteria from multiplying inside the rope core fibers.
Second, the lubricating oil adhered to the wire rope will not be easily wiped off, and the smoothing effect will not be affected within the specified temperature range. In addition, the lubricating oil with adhesive function can also prevent skid, which provides assistance for the friction of the elevator wire rope.
Third, it has a high oil film strength, which can resist the extremely high pressure between the steel wires in contact with each other under extremely heavy load, and can also resist decomposition and transformation.
Fourth, smooth oil has high cohesion, which can avoid the dripping of smooth oil, centrifugal loss when there is no exercise, and avoid grease waste and pollution to other equipment.
Fifth, it does not contain ingredients that can cause corrosion and rust in the steel wire rope, and the effect of anti-corrosion and anti-rust is better.
Sixth, its self-correcting ability is strong. When the wire rope is used, it constantly twists and turns, which will cause the surface oil film to continuously knead and expand. This requires a soft and high-temperature oil film to maintain the rope body from cracking.
Second, the lubricating oil adhered to the wire rope will not be easily wiped off, and the smoothing effect will not be affected within the specified temperature range. In addition, the lubricating oil with adhesive function can also prevent skid, which provides assistance for the friction of the elevator wire rope.
Third, it has a high oil film strength, which can resist the extremely high pressure between the steel wires in contact with each other under extremely heavy load, and can also resist decomposition and transformation.
Fourth, smooth oil has high cohesion, which can avoid the dripping of smooth oil, centrifugal loss when there is no exercise, and avoid grease waste and pollution to other equipment.
Fifth, it does not contain ingredients that can cause corrosion and rust in the steel wire rope, and the effect of anti-corrosion and anti-rust is better.
Sixth, its self-correcting ability is strong. When the wire rope is used, it constantly twists and turns, which will cause the surface oil film to continuously knead and expand. This requires a soft and high-temperature oil film to maintain the rope body from cracking.
Q
What are the classifications of wire ropes?
A
1, electric hoist wire rope: 6 * 37 + FC- 11/13/15/17.5
2, tower crane wire rope and multi-strand non-rotating wire rope: 6 * 19 + FC- 12/12.5, 6 * 37-13/14, 6 * 29FI + FC- 12/12.5, 4v39s + 5FC- 12/13/14, 35W * 7-12/13/14
3, car crane does not rotate wire rope: 4V39S + 5FC- 10/12/13/14/16/17, 35W * 7-10/12/13/14/15/16/17/18/20/22
4, pile driver flat wire rope: K6K36WS + IWR-/17.5/24/26/28/30/32/34/36/40/42/46
5, rotary excavator flat wire rope: 35W * K7- 24/26/28/30/32/36/40
6, dock crane wire rope: 6 * 36WS + IWR- 17.5/19 5/21.5/24/26
7, mine wire rope 6 * 19 + FC- 12.5/14/15.5/17/18.5/21 5/24.5/26/28, 6 * 19S + FC- 12.5/14/15.5/17/18.5/21 5/24.5
8, elevator wire rope: 8 * 19S + FC- 10/11/12/13/16
9. Hot-dip galvanized hanging basket wire rope: 4 * 31WS + PPC- 8.3/8
10. Hot-dip galvanized wire rope: 6 * 19/6 * 37/6 * 36WS/8 * 61/8 * 36WS/
11, galvanized wire rope: 6 * 7 + FC-/2/3/4
6 * 19 + FC-5/6/7 7/9.3/11, 6 * 12 + 7FC-5/6/7. 7/9.3/11, 7 * 19-5/6/8/10, 19 * 7-4/5/6/8/10, 6 * 37 + FC-8.7/9 3/11/13/15/17.5/19.5
12. Large diameter wire rope: above 60MM
13. Wire rope rigging (insertion, pressing, pouring, connectors, etc.):
14, coated wire rope: 2-3/3 - 4/4-5/5-6/6 - 8/8-12/12-15
15, binding wire rope: 6 * 12/6 * 15-13/14/15
The front represents the structure, and the back represents the diameter. For example: 6 * 37 + FC-11, the representative structure is 6 * 37 + FC, diameter: 11MM
2, tower crane wire rope and multi-strand non-rotating wire rope: 6 * 19 + FC- 12/12.5, 6 * 37-13/14, 6 * 29FI + FC- 12/12.5, 4v39s + 5FC- 12/13/14, 35W * 7-12/13/14
3, car crane does not rotate wire rope: 4V39S + 5FC- 10/12/13/14/16/17, 35W * 7-10/12/13/14/15/16/17/18/20/22
4, pile driver flat wire rope: K6K36WS + IWR-/17.5/24/26/28/30/32/34/36/40/42/46
5, rotary excavator flat wire rope: 35W * K7- 24/26/28/30/32/36/40
6, dock crane wire rope: 6 * 36WS + IWR- 17.5/19 5/21.5/24/26
7, mine wire rope 6 * 19 + FC- 12.5/14/15.5/17/18.5/21 5/24.5/26/28, 6 * 19S + FC- 12.5/14/15.5/17/18.5/21 5/24.5
8, elevator wire rope: 8 * 19S + FC- 10/11/12/13/16
9. Hot-dip galvanized hanging basket wire rope: 4 * 31WS + PPC- 8.3/8
10. Hot-dip galvanized wire rope: 6 * 19/6 * 37/6 * 36WS/8 * 61/8 * 36WS/
11, galvanized wire rope: 6 * 7 + FC-/2/3/4
6 * 19 + FC-5/6/7 7/9.3/11, 6 * 12 + 7FC-5/6/7. 7/9.3/11, 7 * 19-5/6/8/10, 19 * 7-4/5/6/8/10, 6 * 37 + FC-8.7/9 3/11/13/15/17.5/19.5
12. Large diameter wire rope: above 60MM
13. Wire rope rigging (insertion, pressing, pouring, connectors, etc.):
14, coated wire rope: 2-3/3 - 4/4-5/5-6/6 - 8/8-12/12-15
15, binding wire rope: 6 * 12/6 * 15-13/14/15
The front represents the structure, and the back represents the diameter. For example: 6 * 37 + FC-11, the representative structure is 6 * 37 + FC, diameter: 11MM
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