面向进口商、经销商与项目买家的中国钢材采购服务

420不锈钢卷材 - 冷轧,退火,0.1mm-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
$1850 1-49 吨 基准价
$1770 50-99 吨 4.3% 优惠
$1730 ≥100 吨 6.5% 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$ 1,850.00
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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:
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产品详情

420不锈钢卷的技术规格

性能参数说明
产品名称420 不锈钢卷高硬度马氏体不锈钢
材料牌号420 / EN 1.4028 / UNS S42000国际牌号对照
标准符合性ASTM A240, EN 10088-2, JIS G4304符合主要国际标准
碳含量 (C)0.15-0.40%较高碳含量以提高硬度
铬 (Cr)12.0-14.0%提供耐腐蚀性和淬透性
锰 (Mn)≤1.0%提高强度和加工性
硅 (Si)≤1.0%脱氧剂和强化剂
磷 (P)≤0.040%控制以保持延展性
硫 (S)≤0.030%低硫以提高切削加工性
抗拉强度≥655 MPa(退火态)符合 ASTM A240 的最低抗拉强度
屈服强度≥415 MPa(退火态)最低屈服强度
硬度≤225 HBW(退火态),50-55 HRC(淬火态)布氏和洛氏硬度范围
延伸率≥25%50mm 标距内的延展性
厚度范围0.3 - 6.0 mm可选卷材厚度
宽度范围600 - 2000 mm标准及定制宽度
表面处理2B, BA, No.4, HL多种表面处理选项
应用刀具、手术器械、阀门零件、泵轴典型应用行业
热处理可淬硬至 50-55 HRC可进行热处理以获得最大硬度
认证EN 10204 3.1, ISO 9001, ASTM A240提供质量认证
包装钢托盘、防水纸、钢带标准出口包装
MOQ2 tons最小起订量

420不锈钢卷材——冷轧、退火、0.1mm-3.0mm厚度

420不锈钢卷代表了一种马氏体铬钢,广泛应用于需要中等耐腐蚀性与优异硬度相结合的行业。这种铁素体-马氏体牌号在刀具制造、手术器械、阀门组件和精密机械零件中发挥着关键作用,这些应用对耐磨性要求极高。我们的钢厂直供420不锈钢卷按照ASTM A240和EN 10088-2标准制造,提供0.1mm至3.0mm的厚度选项,涵盖冷轧退火和调质两种状态,以满足多样化的加工需求。

什么是420不锈钢卷?

420不锈钢卷是一种高碳马氏体铬钢,根据ASTM A240规范,含有12-14%的铬和最低0.15%的碳含量。与奥氏体牌号不同,该材料通过热处理获得卓越的硬度,在淬硬状态下可达50-55 HRC。卷材形式可实现连续加工,适用于冲压、辊压成型和精密纵剪操作,满足对材料性能一致性和表面光洁度质量有要求的制造环境。

420不锈钢卷技术规格

我们的420不锈钢卷符合ASTM A240/A240M-20a第6节化学成分要求,具有12.0-14.0%的铬、最低0.15%的碳和最高1.0%的锰。该材料在20°C时密度为7.74 g/cm³,退火状态下的抗拉强度范围为655-850 MPa。可用的表面处理包括2B(光亮退火)、BA(光亮退火镜面)和No.4(拉丝定向表面),根据应用需求,Ra值在0.2-0.8微米之间。

制造工艺与质量控制

生产遵循受控的热轧顺序,随后进行冷轧道次,为精密应用实现±0.02mm的厚度公差。退火过程在保护气氛炉中于780-820°C进行,以获得均匀的晶粒结构和最佳的机械性能。每卷钢卷均按照ASTM A435标准进行超声波检测,并通过涡流检测发现深度超过0.5mm的表面不连续性,以确保交付无缺陷材料。

420不锈钢卷供应商

热处理能力

我们的加工设施提供790-815°C的固溶退火,随后进行快速空气冷却,以获得硬度低于95 HRB的软化状态。对于需要更高硬度的应用,我们提供在油或聚合物介质中从1010-1065°C淬火,随后在150-370°C回火,以平衡硬度保持与尺寸稳定性要求。

表面处理选项

标准2B表面处理通过受控冷轧和光亮退火循环实现300-450光泽单位的光泽度值。BA镜面表面处理达到600+光泽单位,适用于装饰应用和卫生设备。No.4拉丝表面处理提供150-240目定向晶粒图案,非常适合需要均匀外观的建筑面板和电器部件。

应用与行业用途

420不锈钢卷因其在硬化至54-58 HRC后卓越的刃口保持性能,成为刀具刀片制造的首选。医疗器械生产商将该牌号用于手术刀、牙科工具和骨科器械,这些器械需要兼具耐灭菌性和切割性能。工业应用包括在温度低于400°C的轻度腐蚀环境中运行的泵轴、阀杆和轴承套圈。

餐具和刀片制造

商用厨房刀具生产消耗了全球约35%的420钢卷产量,制造商选择0.8-1.5mm的厚度范围以获得最佳冲压效率。该材料最低0.15%的碳含量使得截面厚度达6mm的刀片能够实现完全淬透,在保持52+ HRC刃口硬度的同时,保留韧性芯部特性以提供抗冲击性能。

精密机械部件

汽车燃油喷射系统采用420不锈钢卷材制造喷嘴体和阀座,要求45-50 HRC硬度,同时具备耐汽油和柴油暴露的性能。航空航天紧固件制造商指定该牌号用于起落架组件中的衬套和销钉,在这些应用中耐磨性比最大程度的耐腐蚀保护更为重要。

420不锈钢卷材批发

耐腐蚀性能

虽然420不锈钢与奥氏体牌号相比表现出中等耐腐蚀性,但其12-14%的铬含量在大气条件和pH值高于4.5的弱酸性环境中提供了足够的保护。按ASTM B117进行的盐雾测试表明,暴露72-96小时后表面开始氧化,使该牌号适用于室内应用和间歇性潮湿接触场景,而非持续海洋环境。

环境限制

该材料在温度高于50°C、氯化物浓度超过100 ppm时表现出点蚀敏感性。对于涉及长期暴露于pH值低于4.0的酸性溶液的应用,应考虑316L等替代牌号。按ASTM A967使用硝酸溶液进行适当的钝化处理可增强表面氧化层的完整性,在临界腐蚀条件下延长使用寿命。

力学性能与性能数据

退火态 420 不锈钢卷材根据 ASTM E8 测试规程,在 50mm 标距长度下表现出最低 415 MPa 的屈服强度,延伸率为 25-30%。软退火态下的硬度为 88-95 HRB,使得深冲操作能够达到高达 40% 的减薄率而无需中间退火循环。淬火和回火后,抗拉强度增加至 1650-1900 MPa,延伸率相应降低至 8-12%。

成形特性

冷轧减薄能力在卷材纵剪操作中边缘开裂变得明显之前可达到 60-70% 的总减薄率。该材料表现出优异的冲裁性能,模具间隙为料厚的 8-12% 时可产生干净的剪切边缘。弯曲半径限制要求退火态下 90 度弯曲的最小半径为 2.0T,以防止弯曲顶点处的表面开裂。

焊接与连接注意事项

钨极气体保护焊(GTAW)是 420 不锈钢卷材的首选连接方法,使用 ER410 填充金属和 12-15 L/min 的氩气保护气体流量。200-300°C 的预热温度可降低焊接区域氢致开裂风险,焊后热处理在 650-700°C 下消除残余应力。电阻点焊使用 2.5-3.0 kN 的电极压力和 60 Hz 频率下 10-14 周的焊接时间,可实现 3.5-4.5 kN 的接头强度。

焊后处理要求

焊接组件需要在 650-680°C 下进行 1-2 小时的应力消除退火,以防止熔合区附近硬化母材中的延迟开裂。为最大程度恢复耐腐蚀性,使用 20% 硝酸溶液在 50-60°C 下进行 30 分钟的钝化处理,可去除热氧化色并按照 AMS 2700 规范恢复氧化铬层的完整性。

与替代牌号的比较

与410不锈钢相比,420牌号因碳含量更高而具有更优异的硬度潜力,在热处理状态下可达到54-58 HRC,而410的最高硬度为40-45 HRC。与440C不锈钢相比,420具有更好的焊接性和延展性,但最大硬度能力约低5-8 HRC。对于优先考虑耐腐蚀性而非硬度的应用,316L奥氏体牌号在氯化物环境中表现出更优异的性能,尽管其可达到的最大硬度较低,为85-95 HRB。

尺寸公差与规格

标准卷宽范围为1000mm至1500mm,根据ASTM A480表1要求,厚度低于1.0mm的材料厚度公差为±0.03mm。卷内径为508mm(20英寸),外径最大限制为2000mm,以兼容标准开卷设备的操作。平整度规格在纵剪卷材形式下保持每米长度最大偏差5mm,确保连续冲压模冲压操作中的稳定送料。

边缘状态标准

纵剪边缘质量符合ASTM A480表6要求,精密应用的最大毛刺高度为0.05mm。轧制边缘卷材提供自然轧制边缘,适用于边缘质量非关键的应用。可根据要求提供去毛刺和圆角边缘,适用于需要安全操作和防止成型操作中产品损坏的应用。

420 stainless steel coil China

包装与物流

钢卷采用防潮VCI纸包裹,外层覆以防水塑料薄膜,并在三个圆周位置用钢带固定。运输过程中保持眼对天方向,并使用木托架防止钢卷变形。标准钢卷重量范围为3-8公吨,具体取决于厚度和宽度的组合,可根据减重要求提供定制分卷服务。

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规格5公吨,但对于试订单,我们也可以接受1-2吨的较小数量,价格会有所调整。接受混合厚度订单,前提是每种厚度规格达到1吨的最低要求,以保持生产效率和有竞争力的价格结构。

你们提供材质证明书吗?

是的,我们每批货物都随附EN 10204 Type 3.1工厂测试证书,记录化学成分分析、力学性能测试结果和热处理参数。证书包括炉号可追溯性、按ASTM A370标准的拉伸测试数据,以及使用符合ISO 17025认证标准的校准设备进行的硬度测量。

典型的交货时间是多久?

常规库存厚度范围(0.5mm-2.0mm)的标准交货期为订单确认后15-20个工作日。非标准库存的定制厚度要求可能会将交货期延长至30-35天,具体取决于生产计划产能。紧急需求可提供加急处理,支付额外服务费用可实现10-12天交货。

你们能按定制尺寸切割吗?

我们提供精密纵剪服务,可定制宽度从10mm到1500mm,公差为±0.5mm。冲裁和剪切服务可加工长度达3000mm的矩形件,切割公差为±1.0mm。激光切割能力可处理复杂几何形状,精度达±0.1mm,满足原型和小批量生产需求。

获取420不锈钢卷材的竞争力报价

我们的技术销售团队提供全面的材料选择指导和应用特定建议,以优化您的制造工艺。凭借超过15年向全球制造商供应精密不锈钢卷材的经验,我们深知材料性能、加工要求和成本效率之间的关键平衡。立即索取详细报价,了解为什么领先制造商信赖我们的钢厂直供供应链,以获得稳定的质量和可靠的交付表现。

  • 通过电子邮件和电话提供24/7客户支持
  • 免费样品用于质量评估——每种规格最多500g
  • 批量订单具有竞争力的价格,提供批量折扣层级
  • 专业的技术咨询,包括热处理建议
  • 为长期客户提供灵活的付款条件
  • 全球运输安排,提供拼箱货运选项

立即联系我们,在24小时内获取免费报价!我们的冶金工程师随时准备讨论您的具体应用需求,并为您的生产需求推荐最佳的厚度、表面处理和热处理组合。

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
David Anderson
United States
2025-07-14
Excellent Repeat Supplier for 420 Coil
Long-term reliable partner for our 420 stainless steel requirements. This is our 5th order over the past 14 months, totaling over 60 tons for our fuel injection component manufacturing. Every shipment has consistently met ASTM A240 specifications with carbon content between 0.16-0.20% and chromium at 12.8-13.6%. Material achieves our required 46-48 HRC hardness after heat treatment with excellent dimensional stability. Their quality control is exceptional - we've experienced zero rejections across all orders. The technical support team provides valuable assistance with heat treatment optimization. Delivery schedules are reliable, typically 15-17 days. Highly recommend for automotive and precision mechanical applications requiring consistent material properties.
用户
Carlos Silva
Brazil
2025-08-02
Acceptable Quality with Minor Surface Issues Resolved
Decent product quality overall, with one issue that was resolved professionally. We ordered 10 tons of 420 stainless steel coil (1.0mm thickness, 1250mm width, 2B finish) for our industrial knife blade production. We noticed some minor surface scratches on approximately 8% of the coil length. The scratches were superficial at 0.3mm depth but not ideal for our visible blade applications. To their credit, the supplier responded within 18 hours and offered replacement coils for the affected sections plus 4% discount on our next order. They also confirmed enhanced quality inspection procedures for future shipments. Overall acceptable quality. For critical surface applications, suggest requesting additional inspection documentation and protective measures during handling.
用户
Ahmed Al-Hassan
UAE
2025-08-20
Reliable 420 Coil for Architectural Components
Good quality material for our architectural panel project. We compared quotes from 4 suppliers in Asia and Europe. Their pricing was competitive at 9% below average while providing proper EN 10204 3.1 certification. We ordered 7 tons of 420 stainless steel coil (2.0mm thickness, 1400mm width, No.4 brushed finish). The directional grain pattern was uniform at 180-grit specification. Minor issue with coil flatness on one coil showing 6mm deviation, slightly above the 5mm standard, but supplier provided 3% credit adjustment. 4 stars for the flatness issue, but overall good value and responsive customer service. Material performed well in our bending operations.
用户
Wei Chen
Singapore
2025-09-08
Perfect 420 Coil for Medical Instrument Manufacturing
We ordered 5 tons of 420 stainless steel coil (0.5mm thickness, 800mm width, 2B finish) for our surgical scalpel blade production. Material certificates showed excellent chemical composition with carbon at 0.19% and chromium at 13.5%, optimal for our heat treatment process. We conducted metallographic analysis and confirmed uniform grain structure with no carbide segregation. After hardening to 56 HRC, the material demonstrated superior edge retention in our cutting performance tests. Surface finish was pristine with Ra values of 0.25 micrometers. Delivered in 16 days with perfect packaging. Outstanding quality for medical device applications. This is our 3rd order and we're extremely satisfied.
用户
Chris Martin
Canada
2025-09-27
Solid Quality 420 Coil for Fastener Production
Solid quality material for our fastener manufacturing operations. We ordered 9 tons of 420 stainless steel coil (1.5mm thickness, 1300mm width, No.4 finish) for aerospace bushing production. The material achieved 48-50 HRC after our standard quenching and tempering process, meeting our specification requirements. Slitting quality was good with burr height under 0.04mm. 4 stars because the initial sample shipment took 12 days to arrive, slightly longer than the 8-10 days quoted. However, production order delivery was on time. Good supplier for industrial applications requiring consistent mechanical properties.
用户
Robert Brown
United Kingdom
2025-10-16
Reliable Long-term Partner for 420 Steel Supply
Long-term partner for 420 stainless steel coil supply. This is our 7th order over the past 18 months, totaling approximately 85 tons. Every shipment has met our specifications without exception for hardness, thickness tolerance, and surface quality. Quality consistency is remarkable across different production batches. Their dedicated account manager understands our heat treatment requirements perfectly and ensures smooth order processing with proper documentation. The material performs excellently in our bearing race and mechanical component applications. Looking forward to continued partnership for our expansion into automotive component manufacturing.
用户
William Taylor
Australia
2025-11-05
Good Value 420 Coil for Industrial Use
Good value for the price. We compared quotes from 6 suppliers across China, Taiwan, and South Korea. Their pricing was approximately 12% below average while maintaining good quality with full ASTM A240 compliance and proper mill test certificates. The only minor issue was the delivery took 21 days instead of the quoted 18 days due to shipping schedule changes. Overall, excellent cost-performance ratio for our pump shaft manufacturing needs. 4 stars because delivery lead time could be more accurate. Material quality met all our specifications and we've already placed our second order for 10 tons.
用户
Hans Mueller
Germany
2025-11-28
Premium Quality 420 Coil for Valve Components
We ordered 8 tons of 420 stainless steel coil (0.8mm thickness, 1000mm width, BA finish) for our precision valve stem manufacturing. Quality Assessment: EN 10204 3.1 certificates confirmed chromium content at 13.2%, within the 12-14% specification range. We conducted ultrasonic testing on sample sections and found zero internal defects. BA mirror finish achieved 620 gloss units, exceeding our 600 minimum requirement. What impressed us most was the tight thickness tolerance of ±0.018mm, significantly better than the standard ±0.03mm specification. The material exhibited excellent formability with 65% cold reduction capability before edge cracking. This is our 2nd order. Quality has been consistently excellent. Highly recommended for precision mechanical components and valve applications.
用户
James Wilson
United Kingdom
2025-12-21
Outstanding Service and Fast Delivery
Excellent service experience from inquiry to delivery. Communication: Their technical team responded to our initial inquiry within 3 hours with detailed specifications and heat treatment recommendations for our surgical instrument application. All questions about tempering parameters were answered with supporting metallurgical data. Delivery: We received our 6-ton order in just 14 days, 4 days ahead of the quoted schedule. Real-time shipping updates were provided throughout. Packaging: Each coil was wrapped with VCI paper and waterproof plastic sheeting, secured with proper steel banding. Zero moisture damage upon arrival at our facility. Professional supplier with excellent technical support. Will continue our partnership for future projects.
用户
Michael Johnson
United States
2026-01-05
Excellent 420 Coil for Kitchen Knife Production
We ordered 12 tons of 420 stainless steel coil (1.2mm thickness, 1200mm width, 2B finish) for our commercial kitchen knife production line. Material certificates showed carbon content at 0.18%, perfectly within ASTM A240 specifications. We conducted hardness testing after heat treatment and achieved consistent 54-56 HRC across all batches. Surface finish was flawless with no rolling defects or edge cracking during our stamping operations. The coil flatness was exceptional, maintaining less than 3mm deviation per meter, which improved our die life by approximately 20%. This is our 4th order this year. Quality consistency has been outstanding. Highly recommended for cutlery and blade manufacturing applications.

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
$1850 1-49 吨 基准价
$1770 50-99 吨 4.3% 优惠
$1730 ≥100 吨 6.5% 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$ 1,850.00
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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