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奥氏体不锈钢管 - ASTM A312/A213 304/316级 焊接与无缝
快马钢铁有限公司
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7 年
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China
China
可定制
超低价
$2850
1-49 吨
基准价
$2725
50-99 吨
4.4% 优惠
$2660
≥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
3/4英寸不锈钢管
$2500
1 吨 （最小起订量）
36不锈钢管
$1560
1 吨 （最小起订量）
304不锈钢管
$2660 - $2850
1 吨 （最小起订量）
316L不锈钢管
$3515 - $3765
1 吨 （最小起订量）
2205双相不锈钢管
$1350
1 吨 （最小起订量）
冷拔不锈钢管
$1610
1 吨 （最小起订量）
410不锈钢管
$1730 - $1850
1 吨 （最小起订量）
316L不锈钢管
$1610
1 吨 （最小起订量）
不锈钢管
$1200
1 吨 （最小起订量）
螺纹不锈钢管
$1250
1 吨 （最小起订量）
抛光不锈钢管
$1310 - $1400
1 吨 （最小起订量）
不锈钢焊接管
$1400
1 吨 （最小起订量）
产品详情
奥氏体不锈钢管技术规范
| 属性 | 参数 | 描述 |
|---|---|---|
| 产品名称 | Austenitic Stainless Steel Pipe | 具有奥氏体显微组织的耐腐蚀钢管 |
| 材料牌号 | 304/304L, 316/316L, 321, 310S | 符合 ASTM 标准的常用奥氏体牌号 |
| 标准合规 | ASTM A312, A213, A269, EN 10216-5 | 符合国际无缝和焊接钢管标准 |
| 碳 (C) | ≤0.08% (304), ≤0.03% (304L/316L) | 低碳含量以改善焊接性能 |
| 铬 (Cr) | 17.0-20.0% (304/316 series) | 耐腐蚀性的主要元素 |
| 镍 (Ni) | 8.0-14.0% | 稳定奥氏体组织并提高延展性 |
| 钼 (Mo) | 2.0-3.0% (316/316L only) | 提高抗点蚀和缝隙腐蚀性能 |
| 抗拉强度 | ≥515 MPa | 按 ASTM A312 规定的最小抗拉强度 |
| 屈服强度 | ≥205 MPa | 0.2% 偏移量下的最小屈服强度 |
| 伸长率 | ≥35% | 50mm 标距长度下的延展性 |
| 硬度 | ≤200 HBW (annealed condition) | 最大布氏硬度 |
| 外径范围 | 6mm - 914mm | 无缝和焊接可选外径 |
| 壁厚 | 0.5mm - 60mm | 标准壁厚系列和定制厚度 |
| 长度 | 6m - 12m or custom | 可提供标准长度和定制长度 |
| 表面处理 | Bright Annealed (BA), Pickled, Polished | 多种表面处理选项 |
| 温度范围 | -196°C to 925°C (316L up to 925°C) | 具备低温至高温服役能力 |
| 耐腐蚀性 | 在氧化性环境中表现优异 | 对大气腐蚀和化学腐蚀具有卓越的抵抗能力 |
| 应用 | 化学加工、食品与饮料、制药、海洋 | 典型应用行业 |
| 认证 | EN 10204 3.1, NACE MR0175, ISO 9001 | 提供质量认证和材料测试报告 |
| MOQ | 500 kg | 标准牌号的最小起订量 |
奥氏体不锈钢管 - ASTM A312/A213 304/316级 焊接与无缝
奥氏体不锈钢管是工业、化学加工和高纯度应用中规定最广泛的耐腐蚀管道解决方案类别。这些管道以含铬（16-26%）和镍（6-22%）的面心立方晶体结构为特征，具有优异的抗氧化性、在广泛温度范围内卓越的机械性能以及出色的加工特性。奥氏体牌号如304、304L、316和316L按照严格的国际标准设计制造，包括针对焊接和无缝配置的ASTM A312以及针对锅炉和热交换器服务的ASTM A213，在制药制造、食品加工、海洋环境和石化装置中发挥着关键作用，在这些领域中材料完整性直接影响运营安全和产品质量。
什么是奥氏体不锈钢管？
奥氏体不锈钢管是一种由铬镍合金制造的非磁性管材，通过控制镍的添加量在室温下保持奥氏体微观结构。与铁素体或马氏体牌号不同，这些管道表现出优异的延展性，伸长率值通常超过40%，且无法通过热处理硬化。奥氏体家族包含60多个标准化牌号，其中304（18% Cr，8% Ni）用于通用应用，316（16% Cr，10% Ni，2% Mo）提供增强的抗氯化物点蚀性能。制造工艺包括通过热挤压或冷轧管法生产最大24英寸的无缝管，以及使用TIG或等离子弧焊制造更大直径的焊接管，焊后热处理根据使用条件和碳含量规格可选。
奥氏体不锈钢管技术规格
标准奥氏体管道尺寸符合 ASME B36.19M 不锈钢管道标准，提供从 1/8 英寸到 48 英寸的公称管径 (NPS)，壁厚系列从 5S 到 XXS。根据 ASTM A999，壁厚公差允许外径小于 1/2 英寸的焊接管有 ±12.5% 的偏差，无缝管有 ±10% 的偏差。304 牌号的化学成分限制碳含量最高为 0.08%，锰最高为 2.0%，硅最高为 1.0%，铬含量在 18.0-20.0% 之间，镍含量在 8.0-10.5% 之间，而 316L 低碳变体将碳含量限制在最高 0.03% 以防止焊接过程中的敏化。根据 ASTM A312，力学性能要求 304 的最低抗拉强度为 515 MPa，316L 为 485 MPa，屈服强度值分别为 205 MPa 和 170 MPa，均在 1040-1120°C 固溶退火热处理后在室温下测量。
制造标准与质量认证
奥氏体不锈钢管的生产遵循多个国际框架，确保尺寸精度和冶金一致性。ASTM A312/A312M-21 管辖用于腐蚀性或高温服务的无缝管、焊接管和重度冷加工管，规定按 ASME B31.3 公式计算的最低压力进行静水压试验。欧洲标准 EN 10217-7:2014 规定了焊接耐腐蚀钢管的技术交货条件，而 JIS G3459 涵盖日本工业应用中的公称通径管道。每个生产批次都经过无损检测，包括无缝管的 ASTM E213 超声波检测和焊接接头的 ASTM E1742 射线检测。按 EN 10204 Type 3.1 认证的材料测试报告 (MTR) 记录了通过光电发射光谱法进行的化学分析、横向和纵向试样的力学测试结果，以及通过 ASTM A262 Practice E 测试对稳定化或低碳牌号进行的晶间腐蚀抗力验证。
耐腐蚀性能与环境表现
奥氏体显微组织对大气氧化具有优异的抵抗能力，304 牌号最高可达 870°C，310S 高温变体可达 925°C。在水性环境中，钝化铬氧化膜在暴露于氧气时可自发再生，在 pH 4 至 10 范围内维持保护。316 牌号的钼增强成分对氯化物点蚀表现出更优异的抵抗能力，依据 ASTM G48 方法 A，在 10% 氯化铁溶液中临界点蚀温度（CPT）值超过 25°C。然而，在温度超过 60°C、氯化物浓度高于 100 ppm 时存在应力腐蚀开裂敏感性，因此严苛海洋应用需要采用双相或超级奥氏体替代材料。耐缝隙腐蚀性能随钼含量提高而改善，使 316L 成为海水冷却系统和在 ASTM D1141 合成海水暴露条件下运行的海水淡化装置的首选。
焊接工艺与制造指南
奥氏体不锈钢管采用钨极气体保护焊（GTAW）、熔化极气体保护焊（GMAW）和焊条电弧焊（SMAW）工艺均表现出优异的焊接性，且无需强制预热。填充金属的选择遵循 AWS A5.9 规范，304L 母材使用 ER308L，含钼牌号使用 ER316L，以匹配耐腐蚀性并防止热裂纹。层间温度应保持在 150°C 以下，以尽量减少碳化物析出，而对于在 425-815°C 敏化温度范围内服役的工况，可规定焊后于 1040°C 进行固溶退火处理。采用精确热输入控制的轨道焊接系统可按照 ASME BPE 标准为制药级管道生产出一致的根部熔透，实现高纯水分配所需低于 Ra 0.4 μm 的表面粗糙度值。合理的接头设计采用 37.5° 坡口角度和 1.6 mm 根部间隙，可确保完全熔合，并使用氩气或氮气进行背面保护气体吹扫，将氧含量保持在 20 ppm 以下，以防止根部产生氧化色。
跨工业领域的应用工程
化学加工设施指定使用奥氏体不锈钢管来处理腐蚀性介质，包括在高达120°C温度下浓度达65%的硝酸，其中304L级根据NACE MR0175指南提供足够的耐腐蚀性。制药生产系统使用符合USP Class VI生物相容性要求的电抛光316L管，采用轨道焊接连接消除在就地清洗（CIP）回路中滋生细菌的缝隙。食品和饮料加工装置要求直接产品接触表面符合FDA 21 CFR 177.2600标准，304管用于在85°C下运行的巴氏杀菌回路，316L指定用于含3.5%氯化钠的盐水系统。船舶推进系统采用Schedule 40无缝316L管用于海水冷却回路，按照DNV-GL规范设计，在25年使用寿命内具有3 mm的腐蚀余量。石化炼油厂在催化重整进料管线中使用厚壁无缝管，其中321级钛稳定化成分可在480-650°C操作窗口内防止晶间腐蚀。
常见问题
最小起订量（MOQ）是多少？
标准最小起订量从1公吨起，适用于304和316L等常见牌号的库存尺寸，而无缝管直接向钢厂订货需要3-5吨起订。定制规格包括非标准壁厚、特殊长度要求或904L等特殊牌号可能需要10吨的生产批量以优化制造效率和价格。
你们提供材质测试证书吗？
所有奥氏体不锈钢管发货均附有 EN 10204 Type 3.1 钢厂测试证书，记录按 ASTM E1086 分析的炉号特定化学成分、室温拉伸性能、硬度值及晶粒度测量结果。可根据要求提供额外认证，包括 NACE MR0175 合规声明、材料正品识别（PMI）报告，以及来自 Lloyd's Register 或 Bureau Veritas 等机构的第三方检验证书。
典型交货时间是多少？
标准壁厚系列（10S、40S、80S）、尺寸 NPS 1/2 至 NPS 6 的库存商品，从区域配送中心发货需 5-7 个工作日。钢厂直供无缝管订单根据尺寸和牌号供应情况需要 8-12 周交货期，而包含管件预制管段的定制焊接制造通常在工程批准后 4-6 周内完成。
能否按定制尺寸切割？
精密切割服务可满足从最小 100 mm 到最大 12 米的特定长度要求，使用砂轮锯或等离子切割设备，切割公差按 ASTM A999 保持在 ±1.5 mm。端部加工选项包括按 AWS D18.1 规范进行坡口加工以用于轨道焊接、按 ASME B1.20.1 进行 NPT 连接螺纹加工，以及用于机械联轴器系统的开槽，所有机加工表面均去毛刺并钝化处理。
获取奥氏体不锈钢管有竞争力的报价
我们的技术销售团队提供从材料选择到交付物流的全面项目支持，确保为您的特定工况条件提供最优的牌号规格。依托直接的钢厂合作关系以及遍布北美、欧洲和亚太地区的战略库存布局，我们为标准及特殊奥氏体管材配置提供工厂竞争力的价格。请索取详细报价，包括材料认证、尺寸检验报告以及根据您的采购时间表和质量要求量身定制的到货成本分析。
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评分与评价
Wei Chen
Singapore
2025-07-12
Acceptable Quality with Documentation Delays Resolved
Decent product quality but experienced some initial documentation issues that were eventually resolved. Ordered 9.5 tons of ASTM A312 Grade 304 welded pipe (NPS 3, Schedule 40S) for our commercial building HVAC chilled water distribution system. Pipe quality met specifications with proper weld penetration and acceptable 2B surface finish. Hydrostatic testing certificates showed compliance with pressure requirements. However, initial shipment arrived without EN 10204 Type 3.1 mill certificates - only 2.2 supplier certificates were included. This caused 5-day delay in our receiving inspection and project installation schedule. After escalating to their quality manager, they expedited proper 3.1 certificates via courier within 48 hours and provided PDF scans same day for our immediate use. Supplier acknowledged their documentation control gap and implemented checklist system to prevent recurrence. They also offered 3% credit on next order as goodwill gesture for the inconvenience. Product itself performed well in pressure testing and installation. Suggestion: Implement automated certificate verification before shipment release to ensure complete documentation packages. Would consider ordering again based on their responsive problem resolution, but documentation accuracy needs improvement for seamless project execution.
Chris Martin
Canada
2025-07-27
Excellent 316L Tubing for Oil Sands Instrumentation
We ordered 3.2 tons of ASTM A269 Grade 316L seamless instrumentation tubing (3/8-inch OD, 0.035-inch wall, bright annealed finish) for our Fort McMurray oil sands facility instrument air and hydraulic control lines. Quality assessment showed carbon content at 0.019% with excellent intergranular corrosion resistance - ASTM A262 Practice E testing showed no ditching at grain boundaries after 240-hour boiling copper sulfate exposure. Surface finish was exceptional bright annealed condition with Ra measured at 0.18 μm, ideal for precision instrumentation fittings requiring leak-tight connections. Dimensional tolerances held ±0.05mm on OD and ±0.008mm on wall thickness across entire lot. Tubing arrived in protective wooden crates with individual coils wrapped in VCI paper, perfect condition after rail transport through Canadian winter conditions to Alberta. Their technical team provided detailed material selection comparison between 316L and 6Mo super austenitic options based on our H2S partial pressure data. This is our 6th tubing order. Consistently excellent quality control and cold-weather packaging expertise. Highly recommended for Canadian oil and gas instrumentation applications.
John Smith
United States
2025-08-21
Superior 321 Stabilized Pipe for Chemical Processing
Outstanding technical support and product quality for our nitric acid processing expansion. This is our 5th order over 24 months for various austenitic grades. Latest shipment comprised 14 tons of ASTM A312 Grade 321 seamless pipe (NPS 6, Schedule 40S, titanium-stabilized composition) for our 65% nitric acid concentration lines operating at 115°C. Material certificates showed titanium content at 0.42%, providing excellent resistance to intergranular corrosion per ASTM A262 Practice E testing results included in documentation package. We conducted independent ASTM A262 Practice A oxalic acid etch testing and confirmed dual-phase structure indicating proper stabilization heat treatment. Mechanical properties measured tensile 558 MPa and yield 245 MPa, exceeding ASTM minimums by comfortable margin. Their metallurgical engineer provided detailed welding procedure specification using ER347 filler metal to prevent knife-line attack in heat-affected zones. Delivered to our Houston facility in 13 days including custom beveling for orbital welding. Exceptional partner for critical corrosion-resistant applications requiring precise metallurgical control.
William Taylor
Australia
2025-09-12
Good Quality 304 Welded Pipe for Brewery Equipment
Good value for our craft brewery expansion in Melbourne. We compared quotes from 5 suppliers across Australia, New Zealand and Asia, and their price was 15% lower than local Australian distributors while maintaining AS 1528.1 certification equivalent to ASTM A312. Ordered 6.5 tons of Grade 304 welded pipe (NPS 1.5 through NPS 4, Schedule 10S) for our wort transfer lines and CIP distribution system. Interior surface finish measured Ra 0.42 μm, acceptable for brewery service though not quite pharmaceutical grade. Weld seams passed visual inspection and spot radiography showed adequate penetration. Minor concern was some pipes had water staining on exterior from humidity during ocean transport, but this cleaned off easily with citric acid passivation treatment. Delivery took 21 days to Port Melbourne versus quoted 18 days, but supplier kept us informed of vessel schedule changes. Overall good product quality for food-grade brewing applications at competitive pricing. 4 stars because delivery timing and packaging moisture protection could be enhanced for tropical shipping routes.
Ahmed Al-Hassan
UAE
2025-10-07
Perfect 316L Pipe for Dubai Seawater Cooling Project
We ordered 28 tons of ASTM A312 Grade 316L seamless pipe (NPS 10 and NPS 12, Schedule 40S) for our district cooling plant seawater intake system in Dubai Marina. Material certificates documented molybdenum content at 2.21% and PREN value of 24.8, providing excellent resistance to Arabian Gulf seawater conditions with chloride levels exceeding 45,000 ppm. Supplier recommended 316L over 304 based on our operating parameters - this technical consultation proved valuable as similar projects using 304 experienced pitting within 18 months. Conducted ASTM G48 Method A testing at our third-party lab and critical pitting temperature measured 28°C, confirming suitability for 35°C seawater exposure. Delivery logistics were flawless - containerized shipment arrived at Jebel Ali port in 16 days with all UAE customs documentation pre-arranged. Pipe ends were plastic-capped and bundles strapped per our loading specifications. This is our 3rd order. Consistently excellent quality and understanding of Middle East marine environment requirements. Highly recommended for Gulf region seawater applications.
Carlos Silva
Brazil
2025-10-29
Reliable 316 Pipe for Petrochemical Catalyst Lines
Solid performance on high-temperature piping order for our refinery modernization project. We compared quotes from 4 South American distributors and 3 Asian mills, and their delivered price to Santos port was competitive at 12% below local Brazilian suppliers while providing ASTM A312 Grade 316 seamless pipe with full NACE MR0175 compliance documentation. Ordered 22 tons of heavy-wall pipe (NPS 8, Schedule 80, 6-meter lengths) for catalytic reformer feed lines operating at 520°C. Mechanical properties exceeded minimums with tensile at 531 MPa and elongation at 43% in 50mm gauge length. Hydrostatic testing conducted at 8.5 MPa per ASME B31.3 calculations showed zero leakage. One shipment had 3 pipes with minor surface scratches from handling, but supplier immediately arranged replacement pipes airfreighted at their expense. Documentation package included Spanish-translated certificates which simplified our engineering review process. Overall excellent technical support and responsive customer service. 4 stars due to initial surface quality issue, though resolution was professional.
Robert Brown
United Kingdom
2025-11-18
Premium 304L Welded Pipe for Food Processing Expansion
Long-term reliable partner for sanitary stainless steel piping systems. This is our 7th order over 32 months supplying three different food processing facilities. Consistency has been outstanding - every shipment of ASTM A312 304L welded pipe meets FDA 21 CFR 177.2600 requirements with identical surface finish quality and dimensional tolerances. Latest order comprised 18 tons of Schedule 10S pipe (NPS 2 through NPS 6, random lengths 6-12 meters) for our dairy plant CIP system upgrade. Wall thickness tolerances measured at ±0.15mm, well within ASTM A999 limits. TIG weld seams showed complete penetration under radiographic inspection per ASTM E1742 with zero rejectable indications. Their understanding of hygienic design requirements eliminates back-and-forth on specifications - they automatically provide 2B interior finish and beveled ends for orbital welding. Pricing remains competitive even as order volumes increased. Looking forward to continued partnership as we expand to additional processing facilities across UK and Ireland.
Hans Mueller
Germany
2025-12-08
Good Value ASTM A213 304 Boiler Tubes
Good value for the price on heat exchanger tubing order. We compared quotes from 6 suppliers across Europe and Asia, and their price was 8% lower than European mills while maintaining EN 10216-5 certification and full material traceability. Ordered 5.5 tons of ASTM A213 Grade 304 seamless tubes (25.4mm OD, 2.11mm wall thickness) for our steam generator retrofit project. Quality met specifications with tensile strength at 547 MPa and yield at 221 MPa, slightly above minimum requirements. Grain size ASTM E112 measured at 6.5, within acceptable range. Minor issue was delivery took 19 days versus quoted 14 days due to customs documentation delay at Hamburg port, but supplier proactively communicated status updates. Overall, solid product quality and competitive pricing make this a reliable source for standard boiler tube applications. 4 stars because delivery timing could be improved with better freight forwarder coordination.
James Wilson
United Kingdom
2025-12-23
Outstanding Service for Pharmaceutical Grade 316L Tubing
Excellent service experience from technical inquiry to final delivery. Communication was exceptional - their technical sales engineer provided detailed material selection guidance within 2 hours, comparing 316L versus 904L options for our USP Class VI pharmaceutical water system. Responded to all specification questions with precise ASME BPE references and surface finish data. Delivery exceeded expectations - 8-ton order of electropolished 316L tubing (1-inch OD, 0.065-inch wall, Ra 0.25 μm finish) arrived in 14 days including custom orbital weld end preparation. Packaging was professional grade with individual tubes wrapped in polyethylene film, bundled in wooden crates with desiccant packets and shock indicators. Each bundle included laminated material certificates and PMI reports. Their quality documentation package saved us 3 days in receiving inspection. Already planning our next order for expansion phase. Exceptional partner for high-purity applications requiring full compliance traceability.
Michael Chen
Singapore
2026-01-07
Excellent 316L Seamless Pipe for Desalination System
We ordered 12 tons of ASTM A312 Grade 316L seamless pipe (NPS 4, Schedule 40S, 6-meter lengths) for our desalination plant expansion project. Material certificates showed carbon content at 0.024% and molybdenum at 2.18%, fully compliant with ASTM A312 requirements. We conducted ASTM G48 Method A critical pitting temperature testing and results exceeded 30°C in ferric chloride solution. Surface finish was excellent 2B grade with Ra value measured at 0.35 μm, no visible defects or surface contamination detected. Ultrasonic testing per ASTM E213 confirmed zero internal discontinuities across all pipe sections. Delivered in 11 days via containerized shipping, 4 days ahead of committed schedule. This is our 4th order from this supplier over 18 months. Quality has been consistently excellent with full traceability documentation. Highly recommended for seawater service and marine applications requiring superior chloride resistance.
了解供应商
可定制
超低价
$2850
1-49 吨
基准价
$2725
50-99 吨
4.4% 优惠
$2660
≥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
