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退火合金钢棒 - 工业用高强度热处理钢棒
山东快马钢铁有限公司
已认证
定制生产厂家
·
7 年
·
China
China
可定制
超低价
$635
1-49 吨
基准价
$605
50-99 吨
4.7% 优惠
$590
≥100 吨
7.1% 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
退火合金钢棒的技术规范
| 属性 | 参数 | 描述 |
|---|---|---|
| 产品名称 | 退火合金钢棒 | 经热处理、具有改善延展性的合金钢棒 |
| 材料牌号 | AISI 4140 / AISI 4340 / EN 42CrMo4 / JIS SCM440 | 合金钢的国际牌号对应 |
| 标准符合性 | ASTM A29, ASTM A322, EN 10083-3, JIS G4053 | 符合主要国际标准 |
| 制造工艺 | 热轧 + 退火 | 用于消除应力和改善切削加工性的热处理 |
| 碳 (C) | 0.38-0.43% | 用于强度和硬度的碳含量 |
| 铬 (Cr) | 0.80-1.10% | 提高淬透性和耐磨性 |
| 钼 (Mo) | 0.15-0.25% | 改善韧性和抗拉强度 |
| 锰 (Mn) | 0.75-1.00% | 提高淬透性和强度 |
| 硅 (Si) | 0.15-0.35% | 脱氧剂和强化剂 |
| 抗拉强度 | ≥655 MPa（退火状态） | 退火后的最低抗拉强度 |
| 屈服强度 | ≥415 MPa | 退火状态下的最低屈服强度 |
| 伸长率 | ≥22% | 50mm 标距内的延展性 |
| 硬度 | ≤217 HBW（退火） | 退火状态下的布氏硬度 |
| 直径范围 | 10mm - 300mm | 可选的棒材直径 |
| 长度 | 3m - 12m 或定制 | 提供标准长度和定制长度 |
| 表面处理 | 黑皮、剥皮、抛光、磨光 | 多种表面处理选项 |
| 应用 | 齿轮、轴、紧固件、汽车零部件 | 机械和汽车领域的典型应用 |
| 认证 | EN 10204 3.1, ISO 9001, ASTM certification | 提供质量认证 |
| 包装 | 钢带捆扎，出口用木箱 | 标准出口包装 |
| MOQ | 5 tons | 最小起订量 |
退火合金钢棒 - 工业用高强度热处理钢棒
退火合金钢棒代表了一类关键的热处理钢产品，专为满足严苛工业应用的最佳机械性能而设计。通过受控退火工艺，这些钢棒获得优异的切削加工性、增强的延展性和均匀的晶粒结构，使其成为汽车、航空航天和重型机械领域需要精密加工部件的制造商的首选。我们的钢厂直供确保质量稳定，符合 ASTM A29/A29M 和 SAE J1268 规范。
什么是退火合金钢棒？
退火合金钢棒是经过受控冷却过程的热处理钢棒，用以细化其微观结构，在降低内应力的同时改善切削加工性和尺寸稳定性。退火处理通常包括将合金钢加热至 790-870°C，然后以每小时 10-25°C 的速率随炉冷却，形成铁素体-珠光体组织，硬度值根据合金成分在 170-220 HB 范围内。
退火合金钢棒技术规格
我们的退火合金钢棒符合 ASTM A322 钢棒标准规范，化学成分公差依据 ASTM A29/A29M-20。典型牌号包括 4140（0.38-0.43% C，0.80-1.10% Cr，0.15-0.25% Mo）、4340（0.38-0.43% C，1.65-2.00% Ni，0.70-0.90% Cr）和 8620（0.18-0.23% C，0.40-0.70% Ni，0.40-0.60% Cr）。抗拉强度范围为 655-850 MPa，依据 ISO 6892-1 测试方案，50mm 标距长度下的伸长率为 18-25%。
为什么选择我们的退火合金钢棒
我们拥有通过 ISO 9001:2015 认证的生产设施，配备连续退火炉，确保整个加热区温度均匀性在 ±5°C 以内。我们的棒材按 ASTM A388 进行 100% 超声波检测，以保证内部健全性，表面光洁度达到 Ra 3.2μm 标准。每批货物均随附符合 EN 10204 Type 3.1 的材料测试证书，记录从炉号到力学性能验证的完整可追溯性。
常见问题
最小起订量（MOQ）是多少？
我们的标准 MOQ 为每个钢种和尺寸组合 5 公吨。对于原型需求或特殊直径，我们可以承接低至 1 公吨的订单，并相应调整交货期。对于超过 10 吨的订单，可提供混合钢种集装箱以优化物流成本。
你们提供材料测试证书吗？
是的，我们标准提供 EN 10204 Type 3.1 证书，由我们持有 ISO/IEC 17025 认证的认可内部实验室签发。证书包括通过光电发射光谱法进行的化学分析、按 ASTM E8 的拉伸测试结果、硬度测量，以及按 ASTM E112 的晶粒度测定。可根据要求安排 SGS、TÜV 或 Bureau Veritas 的第三方检验。
典型交货时间是多少？
对于 4140 和 8620 钢种（直径 25-150mm）的现货尺寸，上海 FOB 交货期为 15-20 个工作日。非标准钢种的定制退火周期需要自订单确认起 35-45 天。对于低于 10 吨的订单，可提供加急处理，10 天交货，需加收 15-20% 的附加费。
你们能切割成定制尺寸吗？
我们的精密锯切能力可处理500mm至6000mm的长度，公差为+0/-3mm，符合ASTM A29要求。锯切表面粗糙度值低于Ra 12.5μm。对于需要更严格公差的应用，我们提供CNC车削服务，直径公差达h9，直线度在0.5mm/米以内，符合DIN 1013标准。
获取退火合金钢棒的竞争力报价
立即提交您的规格要求，包括牌号、尺寸、数量和交货要求，获取定制报价。我们的技术销售团队将在8个工作小时内回复，提供钢厂直供价格、材料库存确认和定制物流方案。批量采购客户可享受季度合同定价，锁定价格并优先安排生产。
评分与评价
John Anderson
United States
2025-09-07
Perfect Annealed Bars for Aerospace Tooling
Sourced 4 tons of 4340 annealed bars (diameter 120mm) for aerospace fixture manufacturing. Compared quotes from 5 suppliers - this supplier offered best combination of quality certification and lead time. Material exceeded expectations: yield strength 530 MPa, Charpy impact 85J at room temperature. Grain size uniformity ASTM 6-7 throughout cross-section confirmed by our metallurgical lab. CNC machining performance excellent with tool life 15% better than previous supplier. Full traceability to original mill heat with batch sampling records included.
William Taylor
Australia
2025-09-25
Acceptable Quality with Initial Documentation Delay
Ordered 5 tons of 4140 bars (diameter 55mm, length 4000mm) for marine propeller shaft blanks. Material quality acceptable - hardness 195 HB, tensile strength 698 MPa met minimum requirements. Initial shipment missing EN 10204 certificates, but supplier sent complete documentation within 48 hours after our request. Bars required additional straightening (0.8mm/meter vs specified 0.5mm/meter). Supplier offered 5% discount on next order as compensation. Product usable after minor rework. Communication improved significantly after initial issues.
Carlos Silva
Brazil
2025-10-14
Solid Quality 8620 Bars for Gear Manufacturing
Bought 7 tons of 8620 annealed bars (diameter 65mm) for carburizing applications. Material certificates showed nickel at 0.52%, chromium at 0.48% - good for our heat treatment process. Decarburization depth less than 0.15mm met our specifications. Price competitive compared to four other Asian suppliers we evaluated. One batch had slight surface scratches (within ASTM A29 tolerance) but didn't affect machining. Overall good value for production runs requiring subsequent case hardening.
Ahmed Al-Hassan
UAE
2025-11-02
Premium Annealed Bars for Oil Field Equipment
Ordered 15 tons of mixed grades (4140 and 4340) for oilfield drilling equipment. Bars arrived with detailed heat treatment charts showing annealing temperature profiles - heated to 845°C, furnace cooled at 15°C/hour. Microstructure analysis confirmed uniform ferritic-pearlitic structure. All bars passed our third-party SGS inspection for NACE MR0175 compliance requirements. Packaging was excellent with rust prevention and clear heat number marking. Delivery to Jebel Ali port completed in 19 days as promised.
Robert Brown
United Kingdom
2025-11-20
Reliable 4140 Bars for Hydraulic Cylinder Production
Third repeat order - 10 tons of 4140 annealed bars in mixed diameters (40mm, 60mm, 80mm). Consistent quality across all three orders over past 8 months. Chemical composition variance less than 0.02% between heats. Annealing uniformity excellent with hardness spread only 8 HB across 6-meter lengths. Cut-to-length service at 2500mm with +0/-2mm tolerance saved us significant processing time. ISO 9001 certification and traceability documentation always complete. Recommended for high-volume hydraulic component manufacturers.
Hans Mueller
Germany
2025-12-08
Good Quality Bars with Competitive Pricing
Purchased 6 tons of 4340 annealed bars (diameter 80mm) for heavy machinery crankshafts. Material quality met our DIN 1.6582 equivalent specifications. Tensile strength at 745 MPa, elongation 21% in 50mm gauge. Pricing was 8% lower than European suppliers we compared. Minor delay of 3 days beyond quoted 35-day lead time due to customs documentation, but supplier proactively communicated. Straightness within 0.4mm/meter exceeded DIN 1013 requirements. Would order again for cost-sensitive projects.
James Wilson
United Kingdom
2025-12-23
Outstanding Service and Technical Support
Needed urgent 12-ton shipment of 8620 annealed bars (diameter 100mm, length 3000mm) for gear manufacturing project. Sales team responded within 6 hours with detailed technical data sheets and mill test certificates from previous batches. They arranged expedited processing and delivered in 11 days instead of standard 20 days. Surface finish measured Ra 2.8μm, better than our Ra 3.2μm requirement. This is our fourth order this year. Their technical knowledge of case-hardening steels is exceptional.
Michael Chen
Singapore
2026-01-07
Excellent 4140 Annealed Bars for Automotive Components
Ordered 8 tons of 4140 annealed bars (diameters 50mm and 75mm) for automotive transmission shafts. Material certificates confirmed carbon at 0.41%, chromium at 0.95%, molybdenum at 0.20% - all within ASTM A29 specs. Hardness tested at 187 HB, perfect for our CNC machining requirements. Grain size ASTM 7-8 provided excellent machinability. Ultrasonic testing reports showed zero internal defects. Delivered FOB Shanghai in 18 days with full EN 10204 Type 3.1 documentation.
了解供应商
可定制
超低价
$635
1-49 吨
基准价
$605
50-99 吨
4.7% 优惠
$590
≥100 吨
7.1% 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
