스테인리스강, 석출경화
3S144 (S144) Bar
항공 우주 등급의 강수량 경화 스테인리스 스틸.
S144 is a British aerospace grade, precipitation hardenable stainless steel. It is widely used in the aerospace industry benefiting from a combination of strength and moderate corrosion resistance.
The alloy has an identical chemical composition when compared to S143 but a higher tensile strength is achieved as a result of heat treatment.
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3S144 Stainless Steel Related Specifications
| 시스템 / 표준 | 국가 / 지역 | 직급 |
| BS Aerospace S100 | 영국 | 3S144 (S144 bar) |
| EN / W.Nr. | 유럽 | 1.4594 |
| 영어 이름 | 유럽 | X5CrNiMoCuNb14-5 |
| UNS | 국제 | S45000 |
| 상호 | 국제 | FV520B |
| 기가바이트 | 중국 | 0크14니5몰리브덴6구리1니오븀 |
속성
화학 성분
| 화학 원소 | % 현재 |
| 탄소(C) | 0.00 - 0.08 |
| 크롬(Cr) | 13.20 - 14.70 |
| 니켈(Ni) | 5.00 - 5.80 |
| 망간(Mn) | 0.00 - 1.00 |
| 인 (P) | 0.00 - 0.04 |
| 황(S) | 0.00 - 0.03 |
| 규소 | 0.00 - 0.60 |
| 니오븀 (콜럼븀) (Nb) | 0.10 - 0.40 |
| 몰리브덴(Mo) | 1.20 - 2.00 |
| 구리(Cu) | 1.20 - 2.00 |
기계적 특성
| 기계적 성질 | 가치 |
| 인장 강도 | 1130-1330 MPa |
| 신율 A50 mm | 12 % |
| 경도 브리넬 | 341 HB |
| 인장 강도 | 1030 N/mm2 |
Applications of S144 / 3S144 Stainless Steel Bar
1. Aerospace Structural and Rotating Components
S144 / 3S144 bar is primarily used in aerospace and defence hardware where very high strength and reliable toughness are required together with moderate corrosion resistance. Typical parts include:
Highly stressed shafts and spindles
Actuation components and control system parts
Pins, levers and clevis fittings in flight control and landing systems
기타 safety-critical structural items in airframes and engines
2. High-Performance Mechanical and Power-Transmission Parts
Thanks to its combination of high tensile strength, wear resistance and fatigue performance, 3S144 is widely used for power-transmission and rotating components, 예를 들면:
Pump and compressor shafts, impellers and rotors
Couplings, hubs and flanges
Precision gears and rings operating under high contact stress
Components in gas turbines, compressors and auxiliary power units
3. Precision Fasteners and Fittings
The alloy’s high strength and good galling resistance make it suitable for precision fasteners and fittings in demanding environments, including:
High-strength bolts, screws and studs
Bushes, sleeves and bearing races
Hydraulic fittings and connector hardware in aerospace and high-tech machinery
4. Corrosion-Resistant High-Load Components
In mildly corrosive or marine-influenced environments where loads are high, S144 / 3S144 bar is selected for:
Valve components and actuator parts
Marine and offshore mechanical hardware exposed to splash and atmospheric corrosion
General engineering parts requiring a combination of stainless corrosion resistance and very high mechanical strength
5. Defence and High-Integrity Engineering
As a British aerospace grade specified in BS S100, S144 / 3S144 is also widely used in defence and high-integrity engineering, including:
Critical weapon system components and guidance hardware
High-reliability parts in military vehicles and equipment
기타 mission-critical mechanisms where consistent properties and traceable heat treatment are mandatory
한 문장 요약
S144 / 3S144 stainless steel bar is used mainly for highly loaded aerospace, defence and high-performance mechanical components—such as shafts, rotors, fasteners, actuators and precision fittings—where very high strength, excellent wear and galling resistance, and dependable corrosion performance are required.
2S143D / S143 스테인리스강 봉의 특성
석출경화 마르텐사이트계 스테인리스강
2S143D / S143는 Cu + Nb 석출 경화 마르텐사이트 스테인리스강, 조절된 시효화를 통해 높은 기계적 강도를 달성하도록 설계된.
2. 노화 처리 후 고강도
용체화 처리 및 이중 시효 후, 이 합금은 다음을 제공합니다:
인장 강도 높음 대략. 930–1180 메가파스칼
고강도 주변 780메가파스칼
뛰어난 하중 지지 능력과 높은 경도
높은 응력이 가해지는 구조 부품에 적합합니다.
3. 우수한 내식성
내식성은 기존의 마르텐사이트 등급(예: 420/440)보다 우수 우주항공 및 기계 응용 분야에서는 적절하며, 17-4PH와 같은 Cr이 풍부한 PH 등급보다는 약간 낮습니다.
4. 뛰어난 갤링 및 마모 저항성
Mo와 Cu와의 합금 덕분에 S143은 다음을 나타냅니다.
탁월한 갤 방지 성능
마모 및 프레팅 부식에 대한 우수한 내성
미끄러지는 접촉 하에서의 안정적인 표면 성능
반복적인 기계적 상호작용이 있는 부품에 이상적입니다.
5. 안정적인 기계적 물성 및 피로 성능
합금은 제공합니다:
노화 후 안정적인 미세구조
균형 잡힌 강인함과 힘
반복 하중 하에서 신뢰할 수 있는 피로 저항
고정밀 항공우주 부품에 자주 선정됩니다.
6. 공정 조건 (2S143D)에서 우수한 가공성
접미사 “디” 나타냅니다 밝게 그려진 봉, 제공:
고차원 정확도
매끄러운 표면 마감
정밀 CNC 가공에 적합한 우수한 절삭성
엄격한 공차를 가진 기계 부품에 적합
7. 완전히 자화 가능한 재료
마르텐사이트계 석출경화 스테인리스강인 S143은 자기, 센서 또는 자기 시스템과 관련된 응용 분야에 유용할 수 있습니다.
8. 항공우주 등급 신뢰성
S143은 항공우주 및 방위 산업용으로 개발되었으며 다음을 제공합니다:
높은 신뢰성
일관된 속성
중요 비행 하드웨어에서의 입증된 성능
Characteristics of 3S144 / S144 Stainless Steel Bar
석출경화 마르텐사이트계 스테인리스강
3S144 / S144 is a Cu + Nb precipitation-hardening martensitic stainless steel bar grade, developed within the BS S100 aerospace series to deliver very high strength through controlled solution treatment and ageing. It has the same basic chemistry as S143, but is heat treated to a higher strength level.
2. Very High Strength After Aging Treatment
After solution treatment and low-temperature ageing, the alloy provides:
Very high tensile strength: typically about 1130–1330 MPa
고강도 typically ≥ 1030 MPa (0.2% proof)
High hardness: approximately 352–401 HB
This strength level, combined with good toughness, makes 3S144 suitable for highly stressed structural and rotating components in aerospace and advanced mechanical systems.
3. 우수한 내식성
The corrosion resistance of 3S144 is:
Better than standard martensitic grades such as 420 / 440 in most industrial and mildly marine environments
Comparable to or slightly below austenitic grades like 304 in many atmospheric conditions
Adequate for long-term use in aerospace, marine, and general engineering applications where high strength plus corrosion resistance are required
However, its corrosion resistance is somewhat lower than that of higher Cr PH grades (e.g., 17-4PH / SUS630) and it is not intended for the most aggressive chloride environments.
4. 뛰어난 갤링 및 마모 저항성
Due to alloying additions of Mo, Cu and Nb and its hardened martensitic + precipitate microstructure, 3S144 offers:
Outstanding anti-galling performance
Very good wear and fretting corrosion resistance
Stable surface behaviour under sliding or oscillating contact
These features make it ideal for shafts, bearings, fasteners, couplings and actuation components subject to repeated mechanical interaction.
5. 안정적인 기계적 물성 및 피로 성능
The alloy exhibits:
A stable, fine precipitation-hardened microstructure after ageing
A well-balanced combination of high strength and useful toughness
Reliable fatigue performance under cyclic loading
As a result, 3S144 is widely selected for high-integrity aerospace and defence hardware, including safety-critical components.
6. Bar Condition and Machinability
3S144 is typically supplied as bright drawn or ground bar and forgings for machining:
좋아요 dimensional accuracy and straightness
매끄러운 표면 마감 suitable for precision turning, grinding and polishing
Reasonable machinability for CNC operations, though generally more difficult to machine than austenitic grades such as 304 due to its higher hardness and strength
It is well suited to tight-tolerance mechanical parts that are finish-machined after heat treatment or supplied in a machinable condition followed by final ageing.
7. 완전히 자화 가능한 재료
As a martensitic PH stainless steel, 3S144 is fully magnetic in all heat-treated conditions. This can be important in applications involving magnetic couplings, sensing, or assembly using magnetic tools and fixtures.
8. 항공우주 등급 신뢰성
Developed specifically for aerospace and defence applications within the BS S100 series, 3S144 provides:
Aerospace-grade reliability and consistency
Tight control of chemistry, cleanliness and heat treatment
A long track record of proven performance in critical flight and defence hardware, such as shafts, fasteners, and actuation components
한 문장 요약
3S144 is a very high-strength, Cu + Nb precipitation-hardening martensitic stainless steel bar grade with excellent galling and wear resistance, good corrosion resistance, stable fatigue performance and aerospace-grade reliability, ideal for highly loaded precision components in demanding mechanical and aerospace applications.
