Product Description
Jiangsu Liangyi is an ISO 9001 stainless steel forging manufacturer in China, supplying 17-4PH (UNS S17400 / AISI 630 / EN 1.4542 / X5CrNiCuNb16-4 / SUS 630) forged bars, seamless rolled rings, discs and custom forgings to oil & gas, refinery, petrochemical, power-generation, valve and marine projects in India and worldwide.
Why 17-4PH for Indian oil & gas, refinery and power projects
17-4PH is a martensitic precipitation-hardening stainless (17% Cr, 4% Ni, 4% Cu, Nb) offering tensile strength from 795 MPa (H1150M) to 1310 MPa (H900) with good corrosion resistance. For sour wellhead and downhole service with H2S, only the H1150D double-aging condition meets NACE MR0175 / ISO 15156 and API 6A 105K and Jiangsu Liangyi verifies 33 HRC on every single piece, not by batch sampling.
Documented sour-service delivery
Jiangsu Liangyi supplied 500+ VAR-refined API 6A 105K forged bars in UNS S17400 (H1150D) to a major oilfield operator for wellhead equipment at H2S 15% and 15,000 psi. Verified results: Charpy 4453 J at 46 C (required 27 J), hardness 2431 HRC (required 33), yield 738765 MPa (required 725) all 500+ pieces passed first-time, delivered in 45 days, with zero sulfide-stress-cracking incidents after two years and three reorders.
Product range for Indian buyers
API 6A 105K sour-service bars (H1150D): 25500 mm, NACE MR0175 compliant
Forged round, square, flat, rectangular and hollow bars: 201500 mm, to 12,000 kg
Seamless rolled rings: OD 1006,000 mm, wall to 600 mm, to 15,000 kg
Wellhead and valve forgings: casing/tubing heads, hangers, spools, flanges, balls, stems, seats
Turbine and pump forgings: impellers, casings, wear rings, shafts (H1150M / H1075)
Forged discs, blocks, plates, pipes, tubes and shells for pressure equipment
Standards & quality
Manufactured to ASTM A564, ASTM A705, API 6A 105K and EN 10250-4, under ISO 9001 and API 6A certification. Melting by air-melt, ESR or VAR. 100% UT (ASTM A388 / EN 10228-3), MPE (ASTM A275), tensile (ASTM E8), Charpy (ASTM A370) and chemistry (ASTM A751). EN 10204-3.1 certificates as standard; EN 10204-3.2 with third-party witness (BV, SGS, Lloyd's, TV, DNV) on request. Note that UNS S17400, EN 1.4542 (X5CrNiCuNb16-4) and SUS 630 are the same grade Jiangsu Liangyi certifies to ASTM, EN and JIS.
What API 6A 105K means for your RFQ
API Specification 6A governs wellhead and Christmas-tree equipment. The "105K" class sets minimum yield strength at 105,000 psi (725 MPa); for H2S service it is paired with NACE MR0175 / ISO 15156, which caps hardness at 33 HRC and mandates the H1150D double-aging condition. Charpy is specified by class Class L 27 J average at 46 C or Class P 41 J average at 29 C, tested per ASTM A370. Jiangsu Liangyi's H1150D bars routinely reach 4552 J at 29 C in production testing, comfortably above the minimum.
Power, valve and marine forgings for Indian projects
Beyond wellhead bars, Jiangsu Liangyi supplies turbine impellers, pump casings, wear rings and shafts in H1150M/H1075 for thermal and combined-cycle plants; forged valve balls, stems, bonnets, bodies and seat rings in H900/H925 for refinery and pipeline valves; and propeller and rudder shafts for marine and offshore service. For chloride-heavy or higher-toughness duty the company can also quote 15-5PH, PH 13-8 Mo, FV520B and Custom 450.
Commercial & logistics
Lead time 3060 days; API 6A 105K within 45 days; rush 2028 days for standard sizes; free quote within 24 hours; door-to-door delivery to Indian ports including Nhava Sheva, Mundra, Chennai, Kandla and Visakhapatnam. Jiangsu Liangyi serves 500+ customers across 50+ countries.
Enquire with Jiangsu Liangyi: sales@jnmtforgedparts.com Jiangsu Province, China.
Jiangsu Liangyi is an independent manufacturer; grade and standard names indicate the material and specifications supplied.
Engineered for Critical ApplicationsJiangsu Liangyi's 17-4PH stainless steel forged products are meticulously crafted to meet the demanding needs of the oil & gas, refinery, and power sectors. Precisely manufactured for API 6A 105K Sour Service, these components excel where strength and corrosion resistance are mandatory. Customers benefit from customized solutions ensuring reliability in critical operations.
Superior Strength and DurabilityWith a minimum yield strength of 105,000 psi and excellent toughness, these forged bars and rings withstand highly corrosive and high-stress environments. Advanced heat treatments further optimize strength and hardness according to specific project requirements, enhancing operational lifespans in the most challenging field conditions.
Advanced Manufacturing and CustomizationUtilizing cutting-edge forging, machining, and precision ring rolling technologies, Jiangsu Liangyi delivers customized 17-4PH components in diverse forms and sizes. Each piece is crafted to the client's specifications, ensuring a tailored fit for unique operational needs and maximum performance across various industrial applications.
FAQ's of 17-4PH UNS S17400 AISI 630 EN 1.4542 X5CrNiCuNb16 4 Forged Bars & Rings for Oil & Gas, Refinery, Power API 6A 105K Sour Service Jiangsu Liangyi:
Q: How does 17-4PH forged steel benefit oil & gas and refinery applications?
A: 17-4PH forged steel offers outstanding toughness, high yield strength (105,000 psi), and exceptional resistance to sour environmental corrosion. This makes it ideal for critical components exposed to harsh conditions in oil & gas and refining operations, ensuring long-lasting performance and safety.
Q: What manufacturing processes are used for these forged bars and rings?
A: Jiangsu Liangyi employs advanced open-die forging, precision machining, and precision ring rolling techniques for fabricating 17-4PH bars and rings. These processes ensure high mechanical strength, dimensional accuracy, and superior surface finish, tailored to each application's requirements.
Q: Can these products be customized for special applications or sizes?
A: Yes, the forged bars and rings can be customized in terms of shape, dimensions, and hardness condition (H900 through H1250) to meet specific project needs. Customers can specify requirements for weight, size, and surface finish, making them suitable for a wide range of custom, mission-critical applications.
Q: What standards do these products comply with?
A: These 17-4PH stainless steel products strictly adhere to standards such as API 6A 105K, EN 1.4542, and AISI 630. Compliance ensures reliable performance, mechanical properties, and suitability for demanding environments commonly found in energy industries.
Q: When should I select 17-4PH forged bars and rings for my project?
A: Choose 17-4PH forged bars and rings when your application demands high mechanical strength, superior corrosion resistance in sour environments, and strict adherence to recognized industry standards like API 6A 105K. They are particularly recommended for equipment facing high stress and corrosive field service.
Q: Where are these products manufactured and supplied from?
A: All 17-4PH forged bars and rings are manufactured by Jiangsu Liangyi Co., Limited, China. The company is an experienced exporter, manufacturer, and supplier, delivering worldwide to industries such as oil & gas, power generation, and refineries.
Q: How are these forged products heat treated for optimal performance?
A: The bars and rings undergo solution annealing and age hardening to achieve the desired combination of strength and toughness. Different hardness conditions (e.g., H900, H1025, H1150) are available based on customer requirements to provide optimal properties for the intended service environment.
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