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409不锈钢管 - ASTM A268/A249焊接与无缝管

快马钢铁有限公司
已认证 定制生产厂家 · 7 年 · 中国 China
可定制 超低价
$1380 1-49 吨 基准价
$1320 50-99 吨 4.3% 优惠
$1290 ≥100 吨 6.5% 优惠
价格有效期:随行就市

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数量

最小起订量: 1 吨

运费合计:面议

商品小计 US$ 1,380.00
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产品详情

409不锈钢管技术规范

属性参数说明
产品名称409 不锈钢管用于汽车和工业应用的铁素体不锈钢管
材料牌号AISI 409 / EN 1.4512 / UNS S40900国际牌号对应
标准合规ASTM A268, ASTM A240, EN 10088-2符合主要国际标准
碳 (C)≤0.08%低碳含量,利于焊接性
铬 (Cr)10.5-11.75%提供基本耐腐蚀性
锰 (Mn)≤1.0%提高强度和淬透性
硅 (Si)≤1.0%脱氧剂和强化剂
钛 (Ti)6×(C+N) 最小 - 0.75% 最大稳定剂,防止晶间腐蚀
抗拉强度≥380 MPa根据 ASTM A268 的最小抗拉强度
屈服强度≥205 MPa最小屈服强度
延伸率≥20%50mm 标距内的延展性
外径范围6mm - 630mm可选外径选项
壁厚0.5mm - 25mm标准和定制厚度
长度6m - 12m 或定制标准和定制长度
表面处理退火、酸洗、抛光多种表面处理选项
应用汽车排气系统、热交换器、工业设备典型应用行业
耐热性最高 815°C最高连续使用温度
认证EN 10204 3.1, ISO 9001, ASTM提供的质量认证
包装钢带捆扎,塑料端盖,木箱标准出口包装
MOQ5 tons最小起订量

409不锈钢管 - ASTM A268/A249焊接与无缝管

409 不锈钢管是一种铁素体铬合金,专为高温排气系统和需要优异抗氧化性能的结构应用而设计。这种高性价比材料广泛应用于汽车排气部件、催化转化器外壳以及温度达到 815°C(1500°F)的工业热交换器系统。我们的 409 不锈钢管按照 ASTM A268(无缝和焊接铁素体管材)和 ASTM A249(锅炉应用)标准制造,在严苛的热环境中保持坚固的结构完整性的同时,提供卓越的价值驱动定价。

什么是 409 不锈钢管?

409 不锈钢管是一种铁素体铬基合金,含 10.5-11.75% 铬并添加钛稳定化元素,专为需要在高达 815°C 高温下抗氧化性能的应用而设计。与奥氏体牌号不同,这种铁素体组织具有磁性,其热膨胀特性与碳钢相似,使其成为汽车排气系统、消声器和催化转化器总成的首选。钛的添加(最低为碳含量的 6 倍)可防止焊接过程中碳化物析出,确保优异的焊接性能,同时避免热影响区出现晶间腐蚀问题。

409 不锈钢管技术规格

我们的 409 不锈钢管按照 ASTM A268/A268M-19(铁素体和马氏体不锈钢管)以及 ASTM A249/A249M-18(锅炉、过热器和热交换器应用)标准制造。化学成分符合严格要求,铬含量为 10.50-11.75%,碳含量最高限制为 0.08%,钛稳定化范围为 6×(C+N) 最小值至 0.75% 最大值,依据 ASTM A240 第 6 节。力学性能包括室温下最小抗拉强度 380 MPa (55 ksi) 和屈服强度 205 MPa (30 ksi),50mm 标距长度下最小延伸率为 20%。

制造标准与质量认证

每根 409 不锈钢管都经过严格的质量控制,符合多项国际标准,包括 ASTM A268-19、EN 10217-7:2014(焊接管)以及 JIS G3463(锅炉和热交换器应用)。我们的制造工厂持有 ISO 9001:2015 认证,具备完整的可追溯性文件,包括工厂测试证书(MTC 3.1 依据 EN 10204)、通过光电直读光谱法进行的化学成分分析,以及依据 ASTM E8/E8M 通过拉伸试验进行的力学性能验证。

尺寸范围与公差

我们的 409 不锈钢管可提供外径从 6.35mm (1/4") 到 914mm (36"),壁厚从 0.5mm 到 50mm,符合 ASTM A999/A999M 中规定的一般要求尺寸公差。标准长度包括 6-12 米的随机长度,并可提供定制切割服务以满足特定项目要求,直线度公差最大为每米 3mm。

409 不锈钢管的主要优势

优异的高温抗氧化性能

10.5-11.75% 的铬含量形成一层保护性氧化铬层,在高达 815°C (1500°F) 的连续工作温度下保持稳定,显著优于在 540°C 以上会迅速氧化的碳钢替代品。与镀铝钢相比,这种卓越的抗腐蚀性能将汽车排气系统中部件的使用寿命延长了 300-500%。

优异的焊接特性

钛稳定化处理可防止焊接操作过程中碳化铬的析出,无需焊后热处理即可实现最佳的熔合性能。兼容 TIG、MIG 和电阻焊工艺,使用符合 AWS A5.9 标准的 ER409 填充金属,焊缝接头效率可达母材强度的 85-90%。

409 不锈钢管供应商

奥氏体牌号的经济高效替代方案

409 的出厂直销价格比 304 或 316L 不锈钢低 40-50%,为那些需要高温抗氧化性能但无需担心氯化物或酸腐蚀的应用提供了具有工厂竞争力的定价。铁素体结构不含镍,在降低材料成本的同时保持排气环境中的性能。

409 不锈钢管批发

热膨胀兼容性

409 不锈钢管的热膨胀系数为 11.0 × 10⁻⁶/°C (20-100°C),与碳钢的 11.7 × 10⁻⁶/°C 非常接近,可最大限度地减少异种金属组合装配中的热应力,降低循环温度应用中接头失效的风险。

主要应用和行业用途

汽车排气系统

在催化转化器外壳、消声器总成、排气歧管和尾管段中发挥关键作用,这些部位废气温度范围为400-800°C。该材料对含硫燃烧产物和热循环的耐受性使其成为原始设备制造商(OEM)和售后市场供应商的行业标准。

工业热交换器

常用于涉及热空气、烟气或温度低于815°C的低腐蚀性工艺流体的管壳式热交换器。典型安装包括发电设施中的余热回收系统、空气预热器和省煤器。

建筑和结构部件

在中等沿海环境的建筑幕墙、屋顶系统和结构支撑中广泛应用,这些场合需要大气耐腐蚀性,但无需承受奥氏体不锈钢的高昂成本。铁素体结构为室内建筑构件和非关键户外应用提供了足够的耐久性。

表面处理和加工选项

我们的409不锈钢管可提供多种表面状态,包括轧制表面(等效2B)、光亮退火(BA)以及180至320目的机械抛光表面。专业加工能力包括按ASTM A380进行酸洗和钝化以去除热着色并增强表面氧化层形成,以及精密切割、坡口和螺纹加工服务以满足特定安装要求。

耐腐蚀特性

抗氧化性能

按ASTM G54进行的实验室测试表明,在815°C空气中暴露1000小时后,氧化速率低于0.5 mg/cm²,验证了其相较于碳钢在相同条件下氧化速率超过15 mg/cm²的优异抗高温起皮性能。

环境限制

虽然 409 不锈钢在干燥的高温氧化环境中表现出优异的抗腐蚀性能,但其对含氯化物气氛、酸性冷凝物和海洋飞溅区的耐受性有限。对于此类应用,建议选用 316L 等奥氏体不锈钢或双相不锈钢作为替代材料。

常见问题解答

最小起订量(MOQ)是多少?

我们的 409 不锈钢管标准最小起订量为每规格 1 公吨,但对于样品评估或原型开发,我们也可承接更小数量,并收取适用的小批量附加费。订单超过 10 公吨可享受批量折扣,根据总吨位和交货计划灵活度,价格可降低 5-12%。

你们提供材质测试证书吗?

是的,每批货物均附带全面的工厂测试证书(按 EN 10204 标准的 MTC 3.1),记录化学成分分析、力学性能测试结果、热处理记录和尺寸检验数据。证书可追溯至原始炉号,并符合 ASTM A268 第 9 节认证要求。可根据要求安排 SGS、TÜV 或 Lloyd's Register 的第三方检验服务。

典型交货时间是多久?

标准库存规格的轧制表面产品备有大量现货,5 公吨以下的订单可在 7-10 个工作日内交货。定制尺寸、特殊表面处理或定尺切割需求通常需要 4-6 周的生产周期,具体取决于钢厂排产和当前订单积压情况。关键项目可提供加急处理,需加收 15-20% 的溢价。

你们可以按定制尺寸切割吗?

我们的精密切割能力可满足从100mm到12,000mm的定制长度要求,使用自动锯切设备,公差为±3mm。附加加工服务包括用于复杂型材的激光切割、用于焊接准备的CNC坡口加工(30°、37.5°或定制角度),以及按ASME B1.20.1为NPT连接进行的螺纹加工。所有切割件在发货前均经过去毛刺和尺寸验证。

获取409不锈钢管的竞争力报价

与值得信赖的供应商合作,我们在铁素体不锈钢分销和加工方面拥有二十年的专业经验。我们的技术销售团队提供材料选择、焊接工艺和特定应用建议方面的专业咨询,以确保您的高温项目实现最佳性能。立即索取您的详细报价,体验与致力于质量、可靠性和客户满意度的ISO 9001:2015认证供应商合作的优势。

  • 通过电话、电子邮件和在线聊天提供24/7客户支持
  • 免费样品用于质量评估——每个规格最多3件
  • 批量订单具有竞争力的价格,批量折扣高达12%
  • 关于焊接工艺和材料兼容性的专业技术咨询
  • 灵活的付款条件,包括LC、TT和经批准的信用账户
  • 全球物流支持,提供FOB、CIF和DDP交付选项

立即联系我们,在24小时内获取您的免费报价!我们经验丰富的团队随时准备以优质409不锈钢管支持您的项目需求,并提供完整的认证文件和可靠的交付表现。

中国409不锈钢管

评分与评价

4.5
基于 10 条评价
5 6
4 3
3 1
2 0
1 0
用户
John Smith
United States
2025-07-02
Acceptable Quality with Documentation Issues Resolved
Decent product overall with some initial documentation challenges that were ultimately resolved. We ordered 4 tons of 409 welded pipe (60.3mm OD, 2.0mm wall thickness) for our industrial oven exhaust ductwork project operating at 650°C. The material quality met ASTM A268 specifications with proper chemical composition and mechanical properties verified by our third-party testing laboratory. However, the initial MTC 3.1 certificates shipped with the material contained heat number discrepancies that didn't match the pipe identification markings, causing our quality department to place the entire shipment on hold pending clarification. This created a 5-day delay in our fabrication schedule while we worked with their documentation team to obtain corrected certificates with proper traceability. To their credit, their quality manager responded within 24 hours of our notification, conducted internal investigation, and provided revised certificates within 3 business days along with root cause analysis showing a clerical error in their certificate generation system. They also implemented corrective action to prevent recurrence and offered expedited shipping at no charge on our next order as compensation for the inconvenience. The pipe itself performed well in our welding trials using ER409 filler metal, achieving good fusion and no cracking in heat-affected zones. Surface condition was acceptable mill finish with minor scale that cleaned easily with wire brushing. Dimensional accuracy was within ASTM A999 tolerances. I would suggest they implement additional quality checks on documentation before shipment to prevent similar issues. Overall acceptable supplier once the paperwork issues were corrected, and their responsive problem-solving approach demonstrated commitment to customer satisfaction. 3 stars reflects the initial documentation problem, but their professional handling of the situation and quality of the actual material warrants consideration for future orders with expectation of improved administrative processes.
用户
Wei Chen
Singapore
2025-07-15
Excellent 409 Pipe Stock Program for Distribution Business
Outstanding partnership supporting our Southeast Asian distribution network for industrial and automotive stainless steel products. This is our 6th order establishing a reliable stock replenishment program for 409 pipe serving customers across Singapore, Malaysia, Thailand, and Indonesia. We ordered 18 tons this quarter (comprehensive size range from 25.4mm to 114.3mm OD, wall thickness 1.0-3.0mm, mixed seamless and welded types) to maintain our warehouse inventory levels for quick customer fulfillment. Their ability to consolidate multiple specifications into single container shipments has reduced our logistics costs by approximately 25% versus ordering individual sizes from different mills. Quality documentation is comprehensive - every heat lot includes MTC 3.1 certificates with complete chemical composition analysis via optical emission spectrometry, mechanical property test results from accredited laboratories, and dimensional inspection reports with statistical process control data. This documentation level satisfies our most demanding customers in petrochemical and power generation sectors requiring full material traceability. The material quality has been consistent across all six orders spanning 20 months - we conduct incoming inspection on 10% random samples and have never identified non-conformances requiring rejection or material review board disposition. Their technical sales team provides valuable market intelligence on pricing trends, mill production schedules, and raw material availability that helps us optimize our purchasing timing and inventory investment. Delivery reliability is exceptional - 5 out of 6 shipments arrived within their quoted 12-14 day window to Singapore port, with proactive communication on the one delayed shipment due to typhoon-related port closures in China. Looking forward to continued growth of our partnership as we expand into Vietnam and Philippines markets where 409 demand is increasing for automotive and appliance manufacturing applications.
用户
Chris Martin
Canada
2025-08-07
Superior 409 Tubing for Aftermarket Exhaust Manufacturing
Long-term partnership for automotive aftermarket exhaust components. This is our 9th order over 32 months supplying our North American distribution network with 409 pipe for custom exhaust fabrication shops and muffler manufacturers. We ordered 14 tons this shipment (multiple sizes: 50.8mm, 63.5mm, 76.2mm OD with 1.2mm and 1.5mm walls, all in 20-foot lengths for our cutting operations). The material consistency has been outstanding across all previous orders - chemical composition variation between heat lots stays within 0.3% for chromium content, ensuring uniform welding characteristics for our diverse customer base using various welding processes from MIG to TIG. The titanium stabilization prevents sensitization issues that plagued our previous supplier's material, eliminating customer complaints about weld zone corrosion in salt-exposed winter conditions. Surface finish quality in mill condition is excellent with minimal scale and no pitting, reducing our customers' pre-weld cleaning time by approximately 30% versus alternative suppliers. Dimensional accuracy is exceptional - we conduct random sampling on every shipment and consistently measure OD tolerance within ±0.2mm and wall thickness within ±0.06mm across 50-piece samples. This precision is critical for our customers' mandrel bending operations and slip-fit assembly designs. Delivered to our Toronto warehouse in 10 days via container to Vancouver port then rail freight, matching their quoted timeline. Their flexible payment terms (60-day NET for established customers) and willingness to accommodate our mixed-specification orders without minimum quantity penalties per size has been invaluable for our inventory management. Pricing remains competitive with 8% volume discount applied consistently as our order quantities have grown. Highly recommend for high-volume automotive exhaust applications requiring reliable material properties and dimensional consistency.
用户
Robert Brown
United Kingdom
2025-08-30
Good Quality 409 Pipe with Competitive Lead Times
Good value proposition for our industrial heat exchanger fabrication business. We compared quotes from 5 European and Asian suppliers, and their pricing was 22% below UK-based stockists while maintaining ISO 9001:2015 certification and comprehensive MTC 3.1 documentation per EN 10204. Ordered 6 tons of 409 welded pipe (48.3mm OD, 2.3mm wall thickness, 6-meter random lengths) for air preheater tube bundles in our biomass power plant project operating at 580°C. The material quality was good with chemical composition meeting ASTM A268 requirements - chromium at 11.0%, titanium at 0.45%, carbon at 0.065%. Mechanical properties exceeded minimums with tensile strength at 395 MPa. However, approximately 12% of the tubes showed minor weld seam offset (0.3-0.5mm) that required additional grinding before our orbital welding operations, adding 4 hours of labor to our fabrication schedule. Their customer service responded quickly when we reported the issue and offered a 5% credit on our next order as goodwill gesture. Delivery was 13 days to our Birmingham facility, within their quoted 12-15 day window. The packaging was adequate with bundle strapping and plastic wrapping, though we recommend they add more protective separation between layers to prevent surface contact marking during transit. Overall, reliable supplier for industrial applications where minor cosmetic variations are acceptable. 4 stars because the weld seam quality variation required additional processing, but the responsive customer service and competitive pricing make them a viable option for our future heat exchanger projects.
用户
William Taylor
Australia
2025-09-21
Perfect 409 Material for Marine Diesel Exhaust Systems
Long-term partner for ferritic stainless steel exhaust components. This is our 11th order over the past 4 years totaling approximately 95 tons of 409 pipe for our commercial vessel exhaust system manufacturing. Their consistency in material quality, dimensional accuracy, and delivery reliability has been exceptional across every shipment. We ordered 7.5 tons this time (various specifications: 63.5mm, 76.2mm, and 88.9mm OD with 1.5-2.0mm walls) for marine diesel exhaust installations on fishing trawlers and coastal ferries operating in Australian waters. The material's thermal expansion coefficient matching carbon steel components has proven critical in our welded assemblies, eliminating thermal stress failures we experienced with austenitic grades in cyclic temperature marine applications. Their technical support team provides valuable welding procedure specifications and post-weld treatment recommendations that have reduced our rejection rate to below 2%. The ASTM A268 certification documentation has passed every third-party inspection by Lloyd's Register and DNV without issues. Delivery consistency is remarkable - 9 out of 11 orders arrived within their quoted 10-12 day timeframe to our Perth facility, with the two exceptions communicated proactively with alternative solutions offered. Pricing remains competitive even as our order volumes have grown, with volume discounts applied transparently. Looking forward to continued partnership as we expand our marine exhaust product line into larger commercial vessels requiring 409's superior oxidation resistance at 650-800°C operating temperatures.
用户
Ahmed Al-Hassan
United Arab Emirates
2025-10-14
Reliable 409 Pipe for Architectural Facade Project
Solid performance on our Dubai commercial building facade project. We compared quotes from 4 suppliers in UAE, India, and China, and their FOB pricing was competitive at 12% below local Dubai stockists while offering superior EN 10204 3.1 certification documentation. Ordered 9 tons of 409 welded pipe (101.6mm OD, 2.0mm wall, mechanically polished to 240 grit finish) for architectural column cladding and decorative structural elements. The polished surface finish was generally good with consistent grain pattern, though approximately 8% of pieces showed minor polishing lines requiring additional buffing by our fabrication team before installation. Material certificates confirmed compliance with required specifications. The ferritic magnetic properties were ideal for our magnetic mounting system design. Delivery took 16 days to Jebel Ali port versus quoted 12-14 days, causing minor coordination issues with our installation contractor's schedule. However, their logistics team arranged direct container delivery to our fabrication facility at no additional cost, which partially offset the delay inconvenience. The pipe straightness was excellent at 1.8mm per meter maximum deviation, well within our architectural tolerances. Overall, reliable supplier for non-critical architectural applications in moderate coastal environments. 4 stars due to the delivery delay and minor surface finish inconsistencies, but would order again for similar projects where slight schedule flexibility exists.
用户
Hans Mueller
Germany
2025-11-05
Premium 409 Seamless Pipe for Automotive OEM Production
We ordered 22 tons of 409 seamless stainless steel pipe (various sizes from 38mm to 89mm OD, wall thickness 1.2-2.5mm) for our automotive exhaust manifold manufacturing line supplying German OEM clients. Quality assessment revealed exceptional material consistency - chemical composition analysis showed chromium at 10.8-11.1% across all heat numbers, carbon content consistently below 0.06%, and titanium stabilization at 0.38-0.52%, all within tight EN 10217-7:2014 specifications. We conducted extensive mechanical testing including tensile tests per DIN EN ISO 6892-1, achieving yield strength of 215-242 MPa and elongation of 22-26% across random samples from different production lots. Surface quality was outstanding with bright annealed finish showing Ra values below 0.4μm, eliminating need for additional surface preparation before welding. The dimensional tolerances were remarkable - OD variance within ±0.15mm and wall thickness within ±0.08mm on our CMM measurements, far exceeding ASTM A999 standard tolerances. This precision significantly reduced our scrap rate during mandrel bending operations for complex exhaust geometries. Delivered to our Stuttgart facility in 8 days via dedicated truck with temperature-controlled storage. This is our 7th order over 3 years. Their consistency in quality, precision manufacturing, and reliable delivery performance has made them our preferred 409 pipe supplier for high-volume automotive production.
用户
Carlos Silva
Brazil
2025-11-28
Good Value 409 Tubing for Industrial Furnace Applications
Good value for the price on our furnace component order. We compared quotes from 6 suppliers across South America, Asia, and Europe, and their mill-direct pricing was 18% lower than the nearest competitor while maintaining ASTM A268-19 certification and full traceability documentation. We ordered 5.5 tons of welded 409 pipe (50.8mm OD, 2.0mm wall) for our industrial furnace exhaust ductwork operating at 720°C continuous temperature. The material quality met our specifications with tensile strength at 412 MPa and yield strength at 238 MPa, both exceeding ASTM minimums. However, delivery took 19 days versus their quoted 14-day lead time due to customs clearance delays at São Paulo port, which caused minor project scheduling adjustments. The packaging could be improved - while adequate, some pieces showed minor surface scratches from transit handling, though none affected structural integrity or weld performance. Their customer service team proactively communicated the delay and provided daily shipment tracking updates, which we appreciated. Overall, solid supplier for cost-sensitive projects where slight delivery flexibility exists. 4 stars because the extended lead time required us to adjust our installation timeline, though the material quality and pricing justified the wait.
用户
James Wilson
United Kingdom
2025-12-18
Outstanding Service and Technical Support for Heat Exchanger Project
Excellent service experience from inquiry to delivery for our waste heat recovery system project. Communication was exceptional - their technical team responded within 3 hours to our initial RFQ with detailed specifications on thermal expansion coefficients and welding procedure recommendations for ER409 filler metal. They provided professional consultation on material selection, confirming that 409 would outperform carbon steel alternatives in our 680°C flue gas environment while offering 45% cost savings versus 316L. Delivery was impressive - 12 tons of seamless pipe (60.3mm OD, 3.2mm wall, 6-meter lengths) arrived at our Manchester facility in 11 days, beating their 14-day commitment. Packaging was industrial-grade with wooden crates, plastic end caps, and individual piece identification tags matching MTC 3.1 certificates. Every pipe was protected against transit damage and moisture. The dimensional accuracy was outstanding with OD tolerance within ±0.3mm across all 240 pieces. Their after-sales support included follow-up calls to verify installation progress and welding parameter optimization. This level of customer care is rare in the steel supply industry. We've already placed our second order for an additional 15 tons for phase two of our project.
用户
Michael Chen
Singapore
2026-01-02
Excellent 409 Pipe Quality for Exhaust System Manufacturing
We ordered 8 tons of 409 stainless steel pipe (76mm OD, 1.5mm wall thickness) for our catalytic converter housing production line. Material certificates showed chromium content at 11.2% and titanium at 0.42%, fully compliant with ASTM A268. We conducted oxidation testing at 750°C for 500 hours and results exceeded our specifications with scaling rate below 0.3 mg/cm². Surface finish was excellent mill finish with no visible defects or weld seam irregularities. The titanium stabilization proved critical for our TIG welding operations, achieving 88% joint efficiency without any intergranular corrosion in heat-affected zones. Delivered in 9 days to our Singapore facility, 2 days ahead of the quoted schedule. This is our 4th order from this supplier over the past 18 months. Quality has been consistently excellent across all shipments. Highly recommended for automotive exhaust applications requiring high-temperature oxidation resistance.

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快马钢铁有限公司

入驻 Sinoali.com 7 年

所在地:China

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$1380 1-49 吨 基准价
$1320 50-99 吨 4.3% 优惠
$1290 ≥100 吨 6.5% 优惠
价格有效期:随行就市

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最小起订量: 1 吨

运费合计:面议

商品小计 US$ 1,380.00
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