GB 18-8 Martensitic Stainless Steel Rod 17-7pH Semi Austenitic Precipitation Hardening 631 Stainless Steel Bars Controlled Phase Transformation 17-4pH Round Rod

• Customization: Available
• Type: Stainless Steel Bars
• Standard: ASTM, AISI, GB, JIS, DIN, EN
• Model NO.: S17700, SUS631, 441, 439, 17-7ph 17-4PH
• Grade: 600 Series
• Certification: ISO, RoHS, IBR, AISI, ASTM, GB, EN, DIN, JIS
• Shape: Round
• Technique: Cold Rolled
• Surface Treatment: Stainless Steel
• Applications: Architectural Decoration
• Product Name: Stainless Steel Rod
• Surface Finish: 2b, Ba, No.1, No.4, 4K, 8K, Mirror
• Tolerance: 1%
• Ni: 8-12%
• Materials: 201, 304, 321, 316ti, 316L, 314h, 310S, 2507
• Transport Package: Water Proof Paper+Metal Pallet+Angle Bar Protectio
• Specification: 1-1020MM or as customized
• Trademark: TISCO, POSCO, JISCO, LISCO etc.
• Origin: Wuxi China
• HS Code: 721922
• Production Capacity: 50000ton/Month

Product Description

GB 18-8 Martensitic Stainless Steel Rod 17-7PH Semi Austenitic Precipitation Hardening 631 Stainless Steel Bars Controlled Phase Transformation 17-4PH Round Rod

 

Product Description

17-7PH is a controlled phase transformation precipitation hardening stainless steel obtained by adding Al to 18-8 austenitic stainless steel. When the steel undergoes solution treatment and is cooled to room temperature, it still retains its austenitic structure, making it easy to process and shape. Through appropriate treatment, it eventually transforms into a martensitic structure, achieving high strength levels. The steel has poor low-temperature toughness and becomes brittle below -100 ° C. Corrosion resistance is superior to general martensitic stainless steel. Stainless structural steel parts, containers, pipelines, etc. that can be used for long-term operation below 350 ° C.
Chemical properties: The oxidation resistance is similar to that of 18-8 austenitic stainless steel. Corrosion resistance is superior to general martensitic stainless steel, and is between nickel chromium austenitic and martensitic stainless steel.
Processing performance: The maximum heating temperature for hot pressure processing of this steel is 1150 ° C, the forging (rolling) temperature is about 1100 ° C, and the termination temperature should not be lower than 950 ° C. After forging and rolling, it should be air-cooled. Cold work hardening treatment tends to be more common, and it is advisable to use methods such as few passes, large reduction, and multiple intermediate solution treatments during cold rolling, cold drawing, or stamping. Cold processed products should undergo solution treatment in a protective atmosphere. In terms of cutting and grinding performance, this steel grade has a high cold work hardening rate, so it is advisable to use low-speed and large feed rate machining during cutting.
Heat treatment performance: The steel needs to undergo solution treatment, adjustment treatment, and then aging treatment. After solid solution treatment, the matrix structure appears as austenite with lower hardness, which is easier to process. Subsequently, through adjustment treatment, the matrix structure is transformed into martensite. The adjustment process is divided into TH system, RH system, and CH system. The aging process causes the precipitation of small and dispersed precipitates in the matrix, strengthening the alloy and further improving its strength. The number after the system code represents the final aging temperature. The domestic temperature is Celsius, while the American standard is Fahrenheit. After solid solution treatment, it generally contains 5% to 20% alpha phase. If the solid solution is overheated, the content of delta ferrite will increase, and delta ferrite is prone to deformation and cracking during processing. Therefore, the temperature should be strictly controlled during solid solution to prevent overheating. After solid solution treatment, the steel can undergo martensitic transformation by directly cold working with large deformation (more than 50%). The product obtained by CH system has the highest strength and is usually used for spring products
Application: The strip material in this standard can be processed into various retaining rings, supports, washers, clamps, etc.
17-7PH, due to its excellent corrosion resistance, oxidation resistance, and good combination of strength and toughness, can replace some spring steels, austenitic stainless steels, or martensitic stainless steels. This steel grade has a wide range of strengths depending on different heat treatment systems and can be applied to parts with various strength requirements.
Selection suggestion:
Require medium to high strength (below 2000Mpa, HRC35~50), For elastic components or thin-walled parts that require corrosion resistance and oxidation resistance, it is recommended to use this material.
The final surface treatment is mainly chemical passivation (Ct. P) or electrochemical polishing (ECP). Other types of surface treatments can be carried out when there are special requirements, and the user can choose according to the service environment.

Product Name	Stainless Steel Bar / Rod
Shape	Round bar,Angle bar,Channel bar,Square bar,Flat bar,I/H bar,Hexagonal bar and profiles
Outer Diameter (OD)	Peeling Bar: 16~180mm Cold Drawn Bar: 4.76~120mm (All sizes can be customized) Forged Bar: 180~400mm
Technique	Hot Rolled,Cold Rolled,Cold Drawn,Forged
Material	201, 202, 301, 302, 304, 304L, 310S, 316, 316L, 321, 430, 430A, 309S, 2205, 2507, 2520, 430 , 410, 440, 904Lect, Or Customized
Standard	ASTM, JIS, GB, AISI, DIN, BS,EN
Certifications	ISO 9001 BV SGS
Packing	Industry standard packaging or according to client's requirement
Payment terms	30%T/T in advance, the balance against the B/L copy
Delivery time	Fast delievery in 7 days,up to order quantity

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Thickness, width, length, color, standard, material, etc. can all be customized.
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Our company offers variety of products which can meet your multifarious demands. We adhere to the management principles of "quality first, customer first and credit-based", since the establishment of the company and always to do our best to satisfy potential needs of our customers. Our company is sincerely to willing to cooperate with enterprises from all over the world in order to realize a win-win situation since the trend of economic globalization has developed with irresistible force.

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FAQ

Q1: Why choose us?
A: Our company, as an internationally experienced and professional supplier, has been engaged in steel business for more than ten years. We can provide a variety of steel products with high quality to our clients.

Q2: Can you provide OEM/ODM service? 
A: Yes. Please feel free to contact us for more details.

Q3:What is your terms of payment?
A: 100% T/T advance.
30% T/T and balance against copy of documents.
30% T/T advance, balance L/C at sight.

Q4: Can we visit your factory? 
A: Warmly welcome. Once we have your schedule, we will arrange the professional sales team to follow up your case.

Q5: Can you provide sample? 
A: Yes. Sample is free for regular sizes, but the buyer needs to pay freight cost.

Q6: How long is your delivery time?
A: Regular lead time is 15 to 30 days after receiving deposit.