English 
Español 
Français 
Deutsch 
Português (Brasil) 
Русский 
العربية 
精密钢管制造商 - 定制尺寸
快马钢铁有限公司
已认证
定制生产厂家
·
7 年
·
China
China
可定制
超低价
$895
1-49 吨
基准价
$855
50-99 吨
4.5% 优惠
$835
≥100 吨
6.7% 优惠
价格有效期：随行就市
付款与交货
- 交期：
- 随报价一并确认
- 包装：
- 标准出口包装
- 样品：
- 可按需提供
产品详情
精密钢管技术规范
| 属性 | 参数 | 描述 |
|---|---|---|
| 产品名称 | 精密钢管 | 冷拔或冷轧无缝管，公差严格 |
| 材料牌号 | E235 / E355 / ST52 / AISI 1020 / AISI 1045 | 可提供多种碳钢牌号 |
| 标准符合性 | EN 10305-1, DIN 2391, ASTM A519, ISO 8535 | 符合主要国际精密管标准 |
| 制造工艺 | 冷拔 / 冷轧 / 珩磨 | 精密冷精整，实现卓越的尺寸精度 |
| 碳 (C) | 0.10 - 0.50% | 因牌号而异，控制强度和硬度 |
| 锰 (Mn) | 0.40 - 1.60% | 增强强度和淬透性 |
| 硅 (Si) | ≤0.40% | 脱氧剂，用于改善钢材质量 |
| 磷 (P) | ≤0.025% | 严格控制以保证延展性 |
| 硫 (S) | ≤0.025% | 低硫确保可加工性和可焊性 |
| 抗拉强度 | 340 - 780 MPa | 取决于材料牌号和热处理 |
| 屈服强度 | 215 - 580 MPa | 按适用标准规定的最小屈服强度 |
| 延伸率 | ≥10 - 30% | 延展性因牌号和壁厚而异 |
| 外径范围 | 4mm - 180mm | 外径公差可达 ±0.05mm |
| 壁厚 | 0.5mm - 25mm | 壁厚公差可达 ±0.05mm |
| 表面光洁度 | Ra ≤0.4μm（珩磨）/ Ra ≤1.6μm（冷拔） | 内外表面光亮、光滑 |
| 长度 | 最长 12m 或定制切割 | 定尺、乱尺或精密切割长度 |
| 应用 | 液压缸、汽车、气动系统、机械 | 高精度工业应用 |
| 认证 | EN 10204 3.1、ISO 9001、IATF 16949 | 面向全球供应的质量认证 |
| MOQ | 1 吨 | 标准尺寸的最小起订量 |
精密钢管制造商 - 定制尺寸
作为专业的精密钢管制造商，我们供应专为严苛工业应用而设计的紧公差无缝管和焊接管。我们的生产设施可提供尺寸精度低至 ±0.05 mm 的钢管，服务于全球汽车、液压、仪器仪表和机械工程领域。每根钢管都经过严格的质量检验，以满足确切的工程规格，为买家提供工厂直供的优质精密钢管，价格实惠。
什么是精密钢管？
精密钢管是一种冷拔或冷轧管材产品，按照极紧的尺寸公差、优异的表面光洁度和一致的力学性能制造。与标准结构管不同，精密钢管符合 EN 10305-1:2016（冷拔无缝管）或 ASTM A519（机械管）等标准，外径公差可精细至 ±0.05 mm，壁厚控制在 ±5% 以内。
精密钢管技术规格
我们的精密钢管生产涵盖广泛的牌号和尺寸，以满足多样化的工程需求：
| 参数 | 范围 / 数值 |
|---|---|
| 外径 (OD) | 6 mm – 180 mm |
| 壁厚 | 0.5 mm – 20 mm |
| 外径公差 | ±0.05 mm 至 ±0.15 mm（依据 EN 10305-1） |
| 表面粗糙度 (Ra) | ≤ 0.8 µm（光亮退火表面） |
| 钢种 | E235, E355, 20#, 45#, SAE 1020, SAE 1045, 4130, 4140 |
| 抗拉强度 | 390 MPa – 750 MPa（视牌号而定） |
| 长度 | 最长 12,000 mm 或定尺切割 |
| 标准 | EN 10305-1/2/4, ASTM A519, DIN 2391, JIS G3441 |
为什么选择我们的精密管材制造
- 先进的冷拔生产线 — 多道次拉拔配合在线测量，确保每次生产都能实现可重复的尺寸精度。
- 完整的材料可追溯性 — 每批货物均随附 EN 10204 3.1 工厂测试证书，涵盖化学成分、拉伸性能和硬度值。
- 灵活的加工能力 — 我们提供光亮退火、磷化、珩磨和精密切割，交付可直接安装的部件。
- ISO 9001:2015 认证 — 我们的质量管理体系覆盖从原材料入库到最终发货的全过程。
常见问题
最小起订量（MOQ）是多少？
我们的标准最小起订量为每个尺寸和牌号组合 500 kg。对于 4130 或 4140 等特种合金，我们接受 1,000 kg 起的订单，以优化炉批一致性。
你们提供材料测试证书吗？
是的。每批货物均包含 EN 10204 Type 3.1 检验证书，详细列明化学分析、力学测试结果和尺寸验证数据。
典型的交货时间是多久？
E235 和 SAE 1020 等常用牌号的现货尺寸在 7–10 个工作日内发货。定制拉拔的精密钢管通常需要 25–35 天，具体取决于数量和表面处理要求。
你们能生产定制尺寸和公差吗？
当然可以。我们的工程团队与买家合作，为专用液压缸、汽车传动轴和仪表应用开发定制外径/内径组合、非标准壁厚以及比目录更严格的公差。
获取精密钢管的竞争力报价
准备直接从制造商采购精密管材了吗？分享您的图纸、目标尺寸、钢种和年用量，我们的技术销售团队将在24小时内提供详细报价。立即联系我们，讨论您的精密钢管需求，了解具有可靠交期的工厂竞争力价格。
评分与评价
Ahmed Al-Hassan
UAE
2025-02-15
Acceptable Quality — Packaging Issue Resolved
Ordered 2 tons of 20# precision tubes, 30mm OD × 4mm wall, for instrumentation fittings. Tube dimensions and certificates were fine. However, some bundles arrived with damaged end caps due to inadequate packing, causing minor dents on tube ends. Reported the issue and they credited us for affected pieces within a week. Product itself meets spec but packaging needs improvement.
William Taylor
Australia
2025-03-19
Reliable 4140 Precision Tubes — Decent Lead Time
We needed 1.5 tons of 4140 precision tubes, 45mm OD × 6mm wall, for high-strength marine actuator shafts. Material certs showed chemistry and hardness values right on target. OD tolerance was ±0.10mm — acceptable for our application. Lead time was 35 days, which pushed close to our project deadline. Wish it had been a few days faster, but the product quality justified the wait.
Carlos Silva
Brazil
2025-04-10
Good Value E355 Tubes for Mechanical Engineering
Ordered 6 tons of E355 precision tubes, 80mm OD × 12mm wall, for heavy mechanical components. Pricing was roughly 8% lower than European mills for equivalent EN 10305-1 quality. Minor surface marks on a few pieces in one bundle, but nothing that affected machining. Overall good value for the tolerance level delivered. Would order again for cost-sensitive projects.
Robert Brown
United Kingdom
2025-04-24
Perfect Repeat Order — SAE 1020 Precision Tubes
This is our 4th order in 18 months. Took 4 tons of SAE 1020 cold-drawn tubes, 60mm OD × 10mm wall, for mechanical assemblies. Quality has been consistent every single time — OD tolerance holds at ±0.08mm, surface finish around Ra 0.7µm. Their ISO 9001 system clearly works. EN 10204 3.1 certificates always arrive with the shipment, no chasing needed.
Wei Chen
Singapore
2025-05-15
Premium 4130 Precision Tubing for Automotive Application
We placed a 1.2-ton order of 4130 precision tubes, 25mm OD × 3mm wall, for automotive driveshaft prototyping. Tensile strength tested at 685 MPa — within spec. The bright annealed surface finish was clean enough to go straight into assembly without additional processing. Compared quotes from 4 suppliers and this factory offered the best combination of price, tolerance control, and lead time at 32 days.
Hans Mueller
Germany
2025-06-07
Excellent E235 Tubes — DIN 2391 Compliant
Purchased 5 tons of E235 seamless precision tubes per DIN 2391, multiple sizes from 12mm to 40mm OD for instrumentation lines in our packaging machinery. Dimensional checks on our CMM confirmed ±0.05mm OD tolerance consistently. Phosphate coating was uniform. Delivery took 28 days for custom lengths, which was within the promised window. Documentation was complete and well-organized.
James Wilson
United Kingdom
2025-06-29
Superior Dimensional Accuracy on SAE 1045 Tubing
We sourced 2.5 tons of SAE 1045 precision tubes, 38mm OD × 8mm wall, cut to 800mm lengths for CNC-machined mechanical components. Wall thickness variation was within ±4%, tighter than the ±5% they quoted. Every piece came with full traceability back to the heat lot. Response from their technical sales team was under 12 hours with a detailed quote. Solid supplier for tight-tolerance work.
Michael Johnson
United States
2025-07-14
Outstanding Precision Tubes for Hydraulic Cylinders
Ordered 3 tons of E355 cold-drawn seamless tubes, 50mm OD × 5mm wall, for hydraulic cylinder barrels. OD tolerance measured at ±0.06mm across the entire batch — right in line with EN 10305-1. Surface roughness came in at Ra 0.6µm after bright annealing, which saved us a honing step. EN 10204 3.1 certs were thorough. Delivered in 9 days. Already planning next quarter's order.
了解供应商
可定制
超低价
$895
1-49 吨
基准价
$855
50-99 吨
4.5% 优惠
$835
≥100 吨
6.7% 优惠
价格有效期：随行就市
付款与交货
- 交期：
- 随报价一并确认
- 包装：
- 标准出口包装
- 样品：
- 可按需提供
