01
ASTM B637 / B637M
Nickel-chromium-molybdenum-columbium alloy rod and bar
Standard specification for precipitation-hardening nickel alloy rod and bar for high-temperature service.
Nickel Alloy — Industrial Product
Inconel 718 Bars & Rods
Inconel 718 nickel alloy bars and rods supplied to ASTM B637 / AMS 5662 / AMS 5663 for high-temperature fasteners, aerospace and gas turbine components.
Indicative priceUSD 40,000 - 65,000 / MT (volume, condition, AMS spec and size dependent)
Lead time30 - 60 working days
01
概述
Inconel 718 Bars & Rods combine a nickel-chromium matrix with substantial niobium, molybdenum and titanium additions to deliver high strength through precipitation (age) hardening. In the solution-annealed-plus-aged condition, the alloy achieves tensile strength above 1275 MPa while retaining useful creep resistance up to approximately 700 °C. It is supplied in round, square and hex bar form per ASTM B637 / ASME SB637 and the corresponding aerospace specifications AMS 5662, AMS 5663 and AMS 5664. The combination of high strength, fatigue resistance and thermal stability makes the bar suited to high-temperature fasteners, gas turbine and aerospace components, rocket and missile parts, high-strength shafts, valve and wellhead components for oil & gas, and tooling where sustained mechanical loading at elevated temperature is required. Each delivery is supported by mill test certification per EN 10204 3.1 and full traceability of heat number, chemical analysis and heat-treatment lot.
核心特性
- 01 高强度 为严苛的结构和工业应用提供高机械强度。
- 02 高温适用性 在适用材料范围内可适用于高温工况。
- 03 抗蠕变性 在长期高温服役下对时间相关变形具有耐受能力。
- 04 抗疲劳性 对重复循环载荷具有良好的耐受能力。
- 05 时效硬化 通过沉淀硬化热处理(固溶+时效)获得高强度。
- 06 耐腐蚀性 在工业腐蚀环境中提供更佳的耐受能力。
- 07 良好切削性 在合适刀具与切削条件下支持高效机加工。
- 08 良好焊接性 采用合适的工艺与匹配的填充材料支持焊接。
- 09 尺寸稳定性 在合适条件下，于加工与服役中提供稳定的尺寸。
- 10 符合标准 按照指定的材料与产品标准制造与供货。
- 11 第三方检验 可根据项目与采购要求安排第三方检验。
- 12 可追溯文件 随附支持材料识别、化学与机械追溯性的文件。
典型应用
- 航空航天零部件 对强度重量比和材料可追溯性有要求的飞机结构件与非结构件。
- 电力发电 常规及联合循环电站的管道、管材与结构部件。
- 机械装备 用于工业机械及 OEM 设备中的轴、齿轮、壳体与机架。
- 油气服务 用于陆上与海上油气上游、中游及下游的工艺管道、流送线及公用工程系统。
- 压力容器 按 ASME、EN 或等同规范设计的压力容器筒体、封头与接管部件。
- 冲压与机加工 用于冲压、深拉伸、CNC 机加工与锻造作业的金属成形与加工。
- 焊接与制造 适用于焊接制造的金属结构、组件与加工部件。
02
技术规格
本节数据对应所适用产品标准的相关参数，可直接用于询价与审批文件。
产品规格
- Material
- Nickel-chromium-iron-niobium-molybdenum alloy (precipitation hardenable)
- Grade
- Inconel 718 / NiCr19Fe19Nb5Mo3 / 2.4668
- UNS_designation
- N07718
- Product_form
- Bar / rod
- Manufacturing_method
- Hot rolled, hot forged, cold drawn or centerless ground
- Condition
- Solution annealed; solution annealed + precipitation (age) hardened
- Surface
- Mill finish; turned, peeled, ground or polished on request
- Cross_section
- Solid round (standard); square, hex and flat on request
- End_condition
- Mill cut; chamfered or machined ends on request
供货规格
- Diameter
- 6 - 350 mm (round); custom sections on request
- Length
- 3 - 12 m; cut-to-length on request
- Tolerance
- Per ASTM B637 / AMS 5662 / AMS 5663 as applicable
- Surface_finish
- Mill finish; turned, peeled, ground or polished on request
- Straightness
- <= 1.5 mm/m (turned or ground)
- Ultrasonic_test
- Per ASTM A388 / AMS 5662 as applicable
- Marking
- Standard mill marking including grade, size, heat number and standard; customer marking on request
- Heat_treatment
- AMS 5662 (annealed) / AMS 5663 (annealed + aged, ~1275 MPa Rm)
Final supply is confirmed against the project drawing, purchase agreement and the mill test certificate.
化学成分
ElementRequirement
Ni 50.0 - 55.0 %
Cr 17.0 - 21.0 %
Nb + Ta 4.75 - 5.50 %
Mo 2.80 - 3.30 %
Ti 0.65 - 1.15 %
Al 0.20 - 0.80 %
Co <= 1.0 %
C <= 0.08 %
Mn <= 0.35 %
Si <= 0.35 %
P <= 0.015 %
S <= 0.015 %
B <= 0.006 %
Cu <= 0.30 %
Fe Balance
Reference: Per ASTM B637 / AMS 5662 / AMS 5663 for Inconel 718 (UNS N07718).
机械性能
PropertyRequirement
Tensile strength (Rm, AMS 5662 annealed) >= 827 MPa
Yield strength (Rp0.2, AMS 5662 annealed) >= 414 MPa
Tensile strength (Rm, AMS 5663 aged) >= 1276 MPa
Yield strength (Rp0.2, AMS 5663 aged) >= 1054 MPa
Elongation (AMS 5663 aged) >= 12 %
Hardness_aged ~331 - 401 HB
Tensile strength (Rm, aged) at 650 °C ~1100 MPa (typical)
Yield strength (Rp0.2, aged) at 650 °C ~950 MPa (typical)
Stress rupture (aged, 650 °C / 690 MPa) >= 23 h (typical)
Reference: Room-temperature values per AMS 5662 (annealed) and AMS 5663 (annealed + aged). Elevated-temperature and stress-rupture values are typical and provided for design reference only.
物理性能
PropertyTypical Value
Density 8.19 g/cm³
Melting range 1260 - 1336 °C
Elastic modulus 200 GPa at 20 °C
Shear modulus 77 GPa at 20 °C
Poisson's ratio 0.284
Thermal conductivity 11.4 W/m·K at 20 °C
Specific heat 435 J/kg·K at 20 °C
Electrical resistivity 1.25 µΩ·m at 20 °C
Thermal expansion (20 - 100 °C) 13.0 x 10⁻⁶ /°C
Curie temperature Non-magnetic (essentially)
Reference: Typical material values for Inconel 718 nickel alloy.
参考体系
标准与文件
适用的产品、尺寸与检验标准应在采购技术规范中一并确认。
02
ASME SB637 / SB637M
ASME pressure vessel equivalent
ASME counterpart of ASTM B637 for pressure vessel and high-temperature applications.
03
AMS 5662
Aerospace Material Specification - Inconel 718 bar (annealed)
Aerospace Material Specification for Inconel 718 corrosion and heat-resistant steel bar and forging stock in the annealed condition.
04
AMS 5663
Aerospace Material Specification - Inconel 718 bar (annealed + aged)
Aerospace Material Specification for Inconel 718 precipitation-hardened bar in the annealed + aged condition (Rm >= 1275 MPa).
05
AMS 5664
Aerospace Material Specification - Inconel 718 bar / forging (vacuum induction + consumable remelt)
Aerospace Material Specification for Inconel 718 bar and forging stock produced by vacuum induction melting plus consumable electrode remelting for premium-grade applications.
06
EN 10269
Steels and nickel alloys for fasteners for high and low temperature service
European reference for high-temperature steel and nickel alloy bar stock used for bolting and fastener manufacture.
07
API 6A 718 / NACE MR0175
Oil & gas reference - Inconel 718 for sour service
Industry reference for Inconel 718 bar used in wellhead and Christmas tree equipment, including sour-service environments per NACE MR0175.
08
EN 10204
Inspection documents
Defines inspection document types such as 3.1 and 3.2 for metallic product delivery.
03
供应能力
从定制尺寸、精密规格到热处理、表面精加工及产品专用工艺，Wayland 根据您的具体需求协调定制化供应解决方案。
切割
按订单要求提供定尺切割和定制切割。
非标尺寸定制
在产品和轧机能力允许的范围内，提供非标尺寸、公差和尺寸组合。
精密定径
针对更严格的公差要求进行精密定径和尺寸控制。
冷加工
按需进行冷拔、冷定径及其他冷加工工艺。
热处理
依据材料、规格及适用标准进行热处理。
表面处理
依据产品、规格及应用要求进行表面处理与精整。
表面涂层与电镀
依据产品与应用要求进行涂层、电镀及其他表面防护处理。
成形加工
依据图纸或订单要求进行弯曲、成形及其他形状加工。
锻造
热锻与冷锻，适用于大截面棒材和定制形状。
机加工
按需进行车削、钻孔、铣削及其他机加工。
无心磨削
精密无心磨削，提供严格的直径公差和改善的表面光洁度。
测试与检验
按适用标准和客户规范进行力学、化学及无损检测。
定制服务
可根据项目规格提供定制尺寸、长度、表面状态、管端处理及检验要求。最终供应能力将依据牌号、规格范围和适用标准，在每次询价时确认。
04
质量
检验与文档流程依据适用产品标准及项目规范要求执行。
- 尺寸检验 依据适用产品标准核查几何尺寸与公差
- 外观与表面检验 表面状态、标识及整体外观
文档
- 检验报告
- 化学成分分析 按炉次，依据适用标准
- 力学性能测试 抗拉强度、屈服强度、伸长率与硬度
- 无损检测 超声波、涡流、水压试验或其他适用的无损检测方法
- 材料牌号鉴别 (PMI) 需要时进行合金牌号验证
文档
- 材料质量证明书 (MTC)
- 炉号可追溯 炉号贯穿于材料质量证明书与产品标识
- 第三方检验协调 可应要求安排 SGS / BV / TÜV 检验
文档
- 第三方检验报告
- EN 10204 文件 标配 3.1 MTC；可应要求提供 3.2
文档
- EN 10204 3.1 材料质量证明书
- EN 10204 3.2 检验证书
- 原产地证书
05
选型
一份准备充分的规格书，是抵御反复澄清沟通最有效的防线。
- 01 选择材料与牌号
根据使用工况、性能要求和适用标准选择材料牌号。
- 02 确定规格与供货状态
明确所需尺寸、表面状态、热处理状态及交货要求。
- 03 确认标准与规范要求
注明适用的产品标准、尺寸标准及适用的项目规范。
- 04 确定检验与文件要求
下单前确认检验、试验、认证及文件提交要求。
采购规范示例
A complete specification suitable for enquiry, covering product, technical requirements, certification and delivery terms.
- Product
- Inconel 718 Bars & Rods
- Grade
- Inconel 718
- Standard
- ASTM B637
- Dimensions
- Ø 25 mm x Length 6000 mm; Round; AMS 5663 (solution annealed + aged); or per drawing
- Condition
- Solution Annealed + Precipitation Hardened (AMS 5663); Turned & Polished; Mill Cut Ends
- Certification
- EN 10204 3.1 Mill Test Certificate
- Quantity
- 20 Metric Tons
- Packaging
- Seaworthy Export Packing
- Incoterm
- CIF Hamburg
06
物流
从工厂发运到目的港的每个环节均由指定货代协调配合，并按采购规范提供完整单据。
-
包装
适用于出口的包装方案，并提供表面与边角防护。
根据产品形态与运输方式，捆扎、包覆或装箱。外表面使用耐候材料保护，端部与边角加装防护以避免运输损伤。
-
装运
标准尺寸采用整箱装载；超大件货物安排散货出运。
通过指定货代进行集装箱装载。LCL 拼箱及超出集装箱尺寸的货物，依据工厂发运计划协调安排。
-
单据
商业发票、装箱单与原产地证书。
工厂单据随货物同行。按采购规范提供 EN 10204 3.1 / 3.2 证书及第三方检验报告。
-
运输
默认采用海运；可应要求安排其他运输方式。
可采用 FCL / LCL 集装箱运输，或针对超大尺寸货物安排散货出运。物流通过指定货代协调。
-
交付
可提供 FOB · CFR · CIF · FCA · EXW 多种贸易条款。
适用《2020 年国际贸易术语解释通则》。装货港：上海 / 宁波 / 深圳。最终目的地与贸易条款按询盘确认。
07
常见问题
大多数询价最终归结为一组反复出现的技术问题。
01 What is Inconel 718?
Inconel 718 (UNS N07718 / NiCr19Fe19Nb5Mo3 / 2.4668) is a precipitation-hardening nickel-chromium alloy containing substantial niobium, molybdenum and titanium. In the aged condition it achieves tensile strength above 1275 MPa and retains useful creep resistance up to approximately 700 °C.
02 What is the difference between Inconel 625 and Inconel 718?
Both are nickel-chromium alloys. Inconel 625 is solid-solution strengthened (not age-hardenable) and is selected primarily for corrosion resistance in chemical, marine and offshore service. Inconel 718 is precipitation hardened and is selected for high strength at elevated temperature in aerospace, gas turbine and high-temperature fastener applications.
03 What standards cover Inconel 718 bar?
Industrial reference is ASTM B637 / ASME SB637. Aerospace references include AMS 5662 (annealed), AMS 5663 (annealed + aged) and AMS 5664 (premium grade). EN 10269 is the European reference for high-temperature fastener stock. API 6A covers Inconel 718 for oil & gas wellhead equipment.
04 What heat treatment is used for Inconel 718 bar?
Standard delivery is solution annealed (AMS 5662) for components that will be machined before final aging, or solution annealed plus precipitation aged (AMS 5663) for finished parts requiring full high-temperature strength. Aging is typically 720 °C / 8 h + furnace cool to 620 °C / 8 h, per AMS 2774.
05 What diameters are available for Inconel 718 bar?
Round bar is supplied from approximately 6 mm up to 350 mm. Smaller sizes are typically cold drawn or centerless ground, larger sizes are hot rolled or forged. Square, hex and flat sections are available on request.
06 What is the maximum service temperature for Inconel 718?
Inconel 718 is suitable for continuous service up to approximately 700 °C. Above this temperature, microstructural coarsening reduces long-term strength. For sustained service above approximately 700 °C, Waspaloy, Rene 41 or Inconel 740H are typical alternatives.