Product:  AISI 630 Stainless Steel Round Bar ( 17-7PH  17-4PH 15-5PH)

Grade 630 stainless steels are martensitic stainless steels that are precipitation hardened to achieve excellent mechanical properties. These steel achieve high strength and hardness following heat treatment. The heat and corrosion resistance of grade 630 are similar to that of grade 304 steels. This grades is also commonly referred to as grade 17-4PH.

One of the key benefits of this grade is that it is available in solution treated conditions, at which they can be easily machined and age-hardened to attain high strength. The age treatment of grade 630 is carried out at low temperatures, to avoid significant distortion. Therefore, this grade is used for applications such as the manufacture of long shafts that do not require re-straightening after heat treatment.

Section A
Our company is one of the biggest suppliers of stainless steel bar in North China. For the 304 stainless steel bar, it has excellent resistance to acid, heat, corrosion resistance, making it an ideal basis for commercial application of material.
For the 304 stainless steel bar, the former belongs to nickel, with a capacity of more than 85%, which is chromium, the use of smaller amount.

Section B

Product Description:

Material: SS Bar, SS Round Bar, Stainless Steel Bar, Stainless Steel Round Bar
AISI /ASTM:
Austenitic: 201, 202, 301, 303, 304, 304L, 309S, 310S, 310H, 314, 316, 316TI, 316L, 316LN, 317, 317L, 321, 347, 347L, 347H, 904L
Duplex: 2205, 2304, 2507, 255, 253mA, 254MO, 654MO ,S32304 ,S32550 ,S31803 ,S32850 ,
Ferritic; 409, 409L, 430, 434, 444, , 446. 430F
Martensitic: 410s, 410, 420. S165M , 630 
Inconel: 600, 607, 617, 625, 
EN:
Austenitic: 1.4272, 1.4273, 1.4310, 1.4305, 1.4301, 1.4306, 1.4833, 1.4835, 1.4845, 1.4841, 1.4401, 1.4404, 1.4571, 1.4438, 1.4541, 1.4878, 1.4550, 1.4539.
Duplex: 1.4462, 1.4362, 1.4410, 1.4507
Ferritic: 1.4512, 1.400, 1.4016, 1.4113, 1.4526, 1.4521, 1.4530, 1.4749;
Martensitic: 1.4006, 1.4021 ,1.4418 
2. Surface: Bright, Peeled, Black.
3. Standard: AISI, ASTM, GB, BS, DIN, JIS, etc.
4. Quality: Prime quality
5. Technique: Hot Rolled and Cold Rolled
6. Origin: China
7. Specification:
Diameter: 4mm-300mm  , Length : 3 meters - 12000 meters
Other size can be supplied as customers' requirement.

Category:
Stainless steel round bar, Stainless steel flat bar
Stainless steel square bar, Stainless steel hexagon bar

Section C
General character:
1. Surface appearance and the use of the possibility of diversification
2. Good corrosion resistance, durable
3. High strength and high temperature oxidation
4. Clean, smooth finish
5. Good welding performance

Section D

Application:
Stainless Steel bar applies to construction field, ships building industry, petroleum and chemical industries, war and electricity industries, food processing and medical industry, boiler heat exchanger, machinery and hardware fields.

Table 1 .   Composition ranges for grade 630 stainless steels

 

Table 2.  Mechanical properties of grade 630 stainless steels