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304不锈钢卷材 - 冷轧及退火,ASTM A240,0.3-3.0mm厚度

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
$2275 1-49 吨 基准价
$2175 50-99 吨 4.4% 优惠
$2125 ≥100 吨 6.6% 优惠
价格有效期:随行就市

供应商定制能力

  • 来图定制
  • 来样定制
  • 全流程定制
数量

最小起订量: 1 吨

运费合计:面议

商品小计 US$ 2,275.00
分享:
发起订单请求
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

304不锈钢卷的技术规格

属性参数描述
产品名称304 Stainless Steel Coil奥氏体铬镍不锈钢卷
材料牌号304 / EN 1.4301 / UNS S30400 / JIS SUS304国际牌号对应
标准符合性ASTM A240, EN 10088-2, JIS G4305, GB/T 3280符合主要国际标准
碳含量 (C)≤0.08%用于强度和焊接性的碳含量
铬 (Cr)18.0-20.0%提供耐腐蚀性
镍 (Ni)8.0-10.5%增强延展性和成形性
锰 (Mn)≤2.0%改善机械性能
硅 (Si)≤1.0%脱氧剂和强化剂
抗拉强度≥515 MPa按 ASTM A240 的最低抗拉强度
屈服强度≥205 MPa0.2% 偏移量下的最低屈服强度
延伸率≥40%50mm 标距长度下的延展性
硬度≤201 HBW / ≤92 HRB布氏和洛氏硬度最大值
厚度范围0.3 - 6.0 mm可提供的卷材厚度选项
宽度范围1000 - 2000 mm标准和定制宽度
表面处理2B, BA, No.4, HL, Mirror 8K多种表面处理选项
卷重3 - 10 tons标准卷重范围
应用Kitchen equipment, food processing, architectural trim, chemical containers典型应用行业
认证EN 10204 3.1, ISO 9001, PED, NACE MR0175提供的质量认证
包装防水纸、钢带、木托盘标准出口包装
MOQ1 ton最小起订量

304不锈钢卷材 - 冷轧及退火,ASTM A240,厚度0.3-3.0mm

304不锈钢卷代表了现代工业应用中规定最广泛的奥氏体铬镍合金,为寻求可靠耐腐蚀性与优异成形性相结合的制造商提供了卓越的多功能性。这种冷轧和退火材料在食品加工设备、建筑面板、厨房电器和化学处理系统中发挥着关键作用,这些应用既需要美观外观又需要功能耐久性。可提供0.3mm至3.0mm的厚度范围,精度公差符合ASTM A240标准,我们的工厂直销304卷为各制造行业的冲压、深冲和辊压成型操作提供具有成本效益的解决方案。

什么是304不锈钢卷?

304不锈钢卷是一种奥氏体铬镍合金的连续带材,含有18-20%的铬和8-10.5%的镍,通过冷轧工艺制造,随后进行退火热处理以获得最佳机械性能。这种非磁性材料具有面心立方晶体结构,提供出色的延展性,使复杂的成型操作不会开裂。冷轧表面光洁度通常从2B(光亮退火)到BA(控制气氛光亮退火)不等,提供适合功能应用和视觉质量重要的装饰用途的光滑表面。

304不锈钢卷技术规格

我们的 304 不锈钢卷材符合 ASTM A240/A240M-20a 化学成分要求,碳含量最高限制为 0.08%,锰最高为 2.0%,硅最高为 1.0%,并具有均衡的铁含量。该材料表现出最低 515 MPa 的抗拉强度和最低 205 MPa 的屈服强度(0.2% 偏移量),同时按照 ASTM E8 测试规程,在 50mm 标距长度下保持最低 40% 的延伸率。在 20°C 时密度为 7.93 g/cm³,热导率为 16.2 W/m·K,比热容为 500 J/kg·K,使其适用于间歇操作中高达 870°C 的中等温度工况。

冷轧 304 卷材的主要优势

与热轧替代品相比,冷轧工艺赋予更优异的表面质量和更严格的尺寸公差,对于精密应用可实现 ±0.05mm 以内的厚度偏差。冷轧后的退火处理消除了加工硬化,恢复了延展性,同时保持细化的晶粒结构,从而增强深冲操作的可成形性,拉延比可达 2.2:1 或更高。这种工艺组合在整个卷材宽度范围内提供一致的力学性能,通常范围为 1000mm 至 1500mm,确保在自动化冲压线和级进模操作中的均匀性能。

304 不锈钢卷材供应商

耐腐蚀性能

18%的铬含量形成一层约1-3纳米厚的钝化氧化铬层,对大气腐蚀、饮用水和温和化学环境提供优异的耐腐蚀性。该合金在农村、城市和轻工业大气环境中表现尤为出色,但在富含氯化物的环境中需谨慎考虑,因为在60°C以上可能发生点蚀。对于涉及暴露于海水或氯化物溶液超过500 ppm的应用,升级为添加钼的316L不锈钢卷可提供增强的抗点蚀性能。

成形性与制造特性

奥氏体组织提供优异的延展性,横向测试的延伸率通常超过45%,使得包括深冲、拉伸成形和旋压在内的复杂成形操作无需中间退火即可完成。冷成形过程中的加工硬化速率保持适中,允许在需要消除应力之前进行多道次成形。回弹特性可预测且可通过适当的模具设计加以控制,对于厚度低于1.5mm的规格,90度弯曲可实现小至材料厚度1.0倍的弯曲半径。

各行业应用

食品加工设施广泛采用304卷材制造输送系统、混合罐和制备台面,这些场合FDA合规性和易于消毒是强制性要求。建筑应用包括电梯面板、柱套和装饰线条,其中光亮退火表面以最少的维护提供持久的美观吸引力。汽车制造商将该材料用于排气系统部件、装饰嵌条和结构加强件,在这些应用中,适中的耐腐蚀性与成形性的结合证明了材料选择的合理性。

厨房设备制造

商用厨房设备制造商倾向于使用 304 卷材制造水槽、台面和电器外壳,因为其非反应性表面可防止风味污染并抵抗酸性食物的染色。该材料能承受商用清洁剂和消毒剂的反复清洗而不发生表面退化,在延长使用寿命期间保持卫生条件。典型应用包括冰箱内衬、烤箱面板和食品制备台,在正常运行期间温度很少超过 200°C。

化学加工设备

制药和化学工业采用 304 不锈钢制造工艺容器、管道系统和储罐,用于在环境温度下处理中等腐蚀性介质。该合金对浓度高达 65% 的硝酸表现出优异的耐腐蚀性,对有机酸、醇类和许多碱性溶液也有足够的耐受性。然而,涉及卤酸、浓度超过 10% 的硫酸或高氯化物环境的应用需要考虑材料升级,以防止过早失效。

表面处理和质量标准

标准 2B 表面通过冷轧后在可控气氛炉中进行光亮退火,达到 Ra 0.5 μm 或更好的表面粗糙度值,产生适合大多数工业应用的中等反射外观。BA(光亮退火)表面提供增强的反射性,Ra 值低于 0.3 μm,接近镜面质量,适用于装饰性建筑元素和高端电器。No. 4 表面通过使用 150-180 目磨料逐步抛光制成,呈现定向纹理图案,通常用于电梯内饰和商用厨房设备。

制造过程控制

我们的生产设施在热轧、冷轧和退火工序中保持严格的工艺控制,以确保一致的力学性能和表面质量。在线测厚系统以0.01mm分辨率监测尺寸精度,自动调整轧机参数以将公差保持在ASTM A240要求范围内。固溶退火在1010-1120°C温度范围内进行,冷却速率超过每分钟55°C,以防止碳化铬析出而损害晶界处的耐腐蚀性。

质量保证测试

每个生产批次均通过光电发射光谱法进行化学成分分析,验证铬、镍和碳含量符合ASTM A240规范。按ASTM E8进行拉伸测试,确认屈服强度、极限抗拉强度和延伸率值满足最低要求,同时使用洛氏B标尺进行硬度测试以验证退火处理是否适当。采用高分辨率相机的表面检测系统可检测直径超过0.5mm的缺陷,确保外观质量满足客户对可见应用部位的期望。

与替代牌号的比较

虽然304具有出色的通用性能,但特定应用可能受益于替代奥氏体牌号。316L型通过添加2-3%钼提供更优异的耐点蚀性能,使其成为海洋环境和涉及氯化物的化学处理的首选。321型加入钛稳定化处理以防止焊接过程中的敏化,非常适合425-815°C范围内存在晶间腐蚀风险的高温应用。对于优先考虑降低成本而非耐腐蚀性的应用,430铁素体不锈钢卷在轻度腐蚀性室内环境中以显著更低的材料成本提供足够的性能。

焊接与连接注意事项

钨极气体保护焊(GTAW/TIG)使用 ER308L 填充金属对 304 卷材可获得最佳效果,能保持热影响区的耐腐蚀性和力学性能。98% 氩气加 2% 氧气的保护气体混合物可防止过度熔透,同时确保结构应用所需的焊缝成形。电阻点焊对厚度低于 2.0mm 的钣金组件可可靠运行,在保持适当电极压力和焊接电流参数时,每个焊点可达到超过 4 kN 的抗剪强度。焊后使用柠檬酸或硝酸钝化处理进行清洁,可恢复保护性氧化铬层,防止焊缝处过早腐蚀。

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种厚度和宽度规格 5 公吨,但对于有持续需求的长期客户,我们也可接受较小数量。当总体积达到 5 吨门槛时,可提供混合厚度订单,为需要多种规格的制造商提供灵活性。在全面订购之前,可提供 100-200 kg 的样品卷用于质量评估和生产试验。

你们提供材质证明书吗?

我们随每批货物提供 EN 10204 Type 3.1 工厂测试证书,记录化学成分分析、力学性能测试结果以及可追溯至特定生产批次的热处理参数。证书包括由我们的 ISO/IEC 17025 认可实验室进行的拉伸测试数据、硬度值和晶粒度测量。可根据要求安排 SGS、TÜV 或 Bureau Veritas 的额外第三方检验服务,相关费用将计入订单。

304 不锈钢卷材批发

典型的交货时间是多少?

标准厚度范围(0.5-2.0mm)的常用宽度(1000mm、1219mm、1500mm)产品,订单确认后,数量在25吨以内的,15-20个工作日内发货。定制厚度规格或非标准宽度需要25-30个工作日,以配合特殊轧制排程和质量验证程序。紧急需求可提供加急生产,交货期为10-12天,视钢厂产能及适用的加急费用而定。

能否按定制尺寸切割?

我们提供精密纵剪服务,可按客户规格定制宽度,公差为±1.0mm,宽度范围为10mm至1500mm。可按100mm的增量剪切特定长度,尺寸在6000mm以内时长度公差为±3.0mm。边缘处理选项包括去毛刺边缘、圆边或符合ASTM A480标准的纵剪边缘质量,确保在自动化送料系统中安全操作和最佳性能。

获取304不锈钢卷的竞争性报价

我们与钢厂的直接关系和高效的供应链管理,使我们能够在保证质量和服务标准的前提下,为304不锈钢卷提供工厂竞争性价格。我们保持常用规格的大量库存以便即时交付,同时我们的生产排程灵活性能够以可预测的交货期满足定制需求。具备冶金专业知识的技术支持人员可协助材料选择、成型工艺优化和故障排除,确保在您的制造运营中成功实施。

  • 通过电话、电子邮件和在线聊天提供 24/7 客户支持
  • 提供免费样品用于质量评估,包括检测证书
  • 批量订单具有竞争力的价格,并提供批量折扣方案
  • 关于材料选择和加工方法的专业技术咨询
  • 为具有良好信用记录的合格客户提供灵活的付款条件
  • 物流协调,包括装柜监督和出口单证

立即联系我们,在 24 小时内获取免费报价,了解我们的 304 不锈钢卷解决方案如何在优化制造成本的同时提升您的产品质量!

304 stainless steel coil China

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 Anderson
United States
2025-07-11
Superior 304 Coil for Chemical Processing Equipment
We ordered 20 tons of 304 stainless steel coil (2.0mm thickness, 1500mm width, 2B finish) for our chemical processing tank fabrication project. ASTM A240 certificates confirmed all chemical composition requirements with carbon at 0.072% and chromium at 18.6%. We performed corrosion testing in 40% nitric acid solution at ambient temperature with zero pitting after 72 hours exposure. Welding performance using ER308L filler was excellent with no heat-affected zone cracking. Flatness was exceptional with deviation less than 3mm per meter. This is our 5th order totaling 87 tons. Consistently excellent quality for corrosive environments. Highly recommended for chemical industry applications.
用户
Carlos Silva
Brazil
2025-07-21
Acceptable Quality with Minor Surface Issues Resolved
Decent product quality overall, with one issue that was resolved professionally. We ordered 11 tons of 304 coil (1.0mm thickness, 1500mm width) for appliance manufacturing. We noticed some minor surface staining on approximately 150 meters of one coil, likely from water contact during storage. The marks were removable with citric acid passivation but added extra processing cost. To their credit, the supplier responded within 12 hours and provided a 6% credit on our invoice plus confirmed improved warehouse storage procedures. For visible appliance applications, suggest requesting additional protective wrapping and climate-controlled storage confirmation.
用户
Chris Martin
Canada
2025-08-07
Reliable 304 Coils for Food Processing Industry
Solid performance for our food equipment clients. We stock 304 coil in multiple thicknesses (0.6mm to 2.0mm) for distribution to local fabricators. Surface finish quality is consistent with FDA compliance requirements. The 2B finish maintains its appearance after forming and welding operations. Pricing is competitive for our market. Minor issue with one coil having slight edge waviness within the first 2 meters, but remainder was perfectly flat. Overall dependable supplier for our inventory needs. 4 stars due to occasional edge quality variation.
用户
Ahmed Al-Hassan
United Arab Emirates
2025-08-31
Solid Quality for Architectural Cladding Projects
Good quality material for our facade projects. We ordered 14 tons of 304 coil (1.5mm thickness, 1219mm width, No. 4 finish) for building cladding applications in harsh desert climate. Material performed well during brake forming operations with minimal springback. The directional grain pattern was uniform and aesthetically pleasing. Delivery took 22 days, slightly longer than the 18-day estimate due to shipping delays. Overall reliable supplier. 4 stars because lead time accuracy needs improvement. Will continue ordering for future projects.
用户
William Taylor
Australia
2025-09-23
Good Value 304 Coil for Coastal Applications
Good value for the price. We compared quotes from 6 suppliers across China, South Korea, and Japan. Their pricing was approximately 12% below average while maintaining quality with full EN 10204 3.1 certification and passivation treatment. The only minor issue was the coil ID tolerance varied between 508mm and 520mm, requiring adjustment to our decoiling equipment. Overall, excellent cost-performance ratio for our marine equipment manufacturing. 4 stars because coil ID consistency could be improved. Already placed our second order for 10 tons.
用户
Michael Chen
Singapore
2025-10-14
Perfect Material for Deep Drawing Applications
We ordered 9 tons of 304 coil (0.5mm thickness, 1000mm width, BA finish) for our deep-drawn component manufacturing. The material demonstrated exceptional formability with successful draw ratios of 2.4:1 in our tooling trials. Work hardening rates were moderate, allowing three-stage forming without intermediate annealing. Surface quality after forming maintained mirror-like reflectivity with no orange peel effect. Grain size measurements showed ASTM No. 7, ideal for our complex geometries. This is our 3rd order. Consistently superior performance for precision stamping operations.
用户
Robert Brown
United Kingdom
2025-11-05
Reliable Long-Term Partner for Stainless Steel Supply
Long-term partner for 304 stainless steel coil supply. This is our 7th order over the past 18 months, totaling approximately 95 tons. Every shipment has met our ASTM A240 specifications without exception. Mechanical properties remain consistent batch-to-batch with yield strength averaging 215 MPa. Their dedicated account manager understands our automotive trim requirements perfectly and coordinates production scheduling to match our quarterly demand cycles. Looking forward to continued partnership for our expansion into electric vehicle components.
用户
Hans Mueller
Germany
2025-11-27
Premium 304 Coils for Pharmaceutical Processing Equipment
We ordered 18 tons of cold-rolled 304 coil (1.2mm thickness, 1500mm width) for our pharmaceutical vessel manufacturing project. EN 10204 3.1 certificates confirmed chromium content at 18.4% and nickel at 8.7%, meeting DIN EN 10088-2 requirements. Surface inspection revealed no pitting, inclusions, or roll marks across 3000 meters of material. The annealed condition provided excellent ductility with elongation values of 47% in transverse testing. Springback characteristics were highly predictable, allowing us to optimize our progressive die tooling. This is our 2nd order. Quality consistency is remarkable for hygienic applications.
用户
James Wilson
United Kingdom
2025-12-18
Outstanding Service and Fast Delivery for Elevator Panels
Excellent service experience from inquiry to delivery. Communication: Their technical team responded to our BA finish specifications within 90 minutes with detailed surface roughness data and sample images. All questions about grain structure and forming limits were answered with supporting metallurgical documentation. Delivery: We received our 6-ton order in just 11 days, 4 days ahead of the quoted schedule. Real-time shipping updates were provided throughout. Packaging: Each coil was wrapped with dual-layer PE protective film and secured with steel strapping. Edge protectors prevented any damage during transit. Zero defects upon arrival. Outstanding supplier for architectural applications. Will definitely continue our partnership.
用户
David Martinez
United States
2026-01-02
Excellent Quality 304 Coil for Commercial Kitchen Equipment
We ordered 12 tons of 304 stainless steel coil (0.8mm thickness, 1219mm width, 2B finish) for our commercial kitchen equipment production line. Material certificates showed carbon content at 0.065%, fully compliant with ASTM A240 specifications. We conducted formability testing with draw ratios reaching 2.3:1 without cracking. Surface finish was consistently excellent across the entire coil with Ra values below 0.4 μm. The tight thickness tolerance of ±0.04mm significantly reduced our scrap rate during stamping operations. This is our 4th order this year. Quality has been consistently excellent. Highly recommended for food processing equipment manufacturing.

了解供应商

快马钢铁有限公司

入驻 Sinoali.com 7 年

所在地:China

可定制 超低价
$2275 1-49 吨 基准价
$2175 50-99 吨 4.4% 优惠
$2125 ≥100 吨 6.6% 优惠
价格有效期:随行就市

供应商定制能力

  • 来图定制
  • 来样定制
  • 全流程定制
数量

最小起订量: 1 吨

运费合计:面议

商品小计 US$ 2,275.00
分享:
发起订单请求
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

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