17-4PH Stainless Steel | SUS630 Stainless Steel

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17-4PH Stainless Steel | SUS630 Stainless Steel Stainless Steel

We are the Leading Supplier of Stainless Steel 17-4PH.  
Stainless Steel 17-4PH (SUS630 Stainless Steel) is a precipitation hardening martensitic stainless steel, which combines high strength and hardness (after heat treatment) with excellent corrosion resistance, and is suitable for easy fabrication.

We supply and export to Singapore , Indonesia , Brunei and other ASEAN Countries.  
Our specialty is to provide wide range of stainless steel
 with no minimum order (MOQ).

E Steel supply Stainless Steel 17-4PH Rounds Bar , Stainless Steel 17-4PH Rods , 17-4 PH Stainless Steel Plates.  
We supply 17-4PH (SUS 630) in 5 conditions :  17-4PH Annealed , 17-4PH H1025 , 17-4PH H1075 , 17-4PH H1150 , 17-4PH H900
or JIS Standard SUS630 Annealed , SUS630 H1025 , SUS630 H1075 , SUS630 H1150 , SUS630 H900 
* SUS630 is the JIS Standard (Japan Origin) of 17-4PH.  

E Steel supplying 17-4PH H900 Stainless Steel to Petronas Labuan Projects , please refer : https://www.ecarbonsteel.com/index.php?ws=latestnews&nid=97083

17-4PH Stainless Steel Suppliers - SUS630 , AISI 630 , UNS S17400 , 1.4548 Precipitation Stainless Steel

Stainless Steel 17-4PH is a precipitation hardening martensitic stainless steel, which combines high strength and hardness (after heat treatment) with excellent corrosion resistance, and is suitable for easy fabrication.

Solution Treatments for 17-4PH (SUS630) 

As supplied 17-4 PH is usually in the solution treated condition (Condition A). It can be heat treated at different temperatures to offer a wide range of properties.

Condition    Hardening    Hardening  Type of Cooling  Hardness
  Temperature Time     Brinell    Rockwell C 
17-4PH Annealed 1038°C 1/2   Oil/Air (to below 32°C)   363 max. 39 max.
17-4PH H900 480°C 1 Air 420 44
17-4PH H925 594°C 4 Air 409 42
17-4PH H1025 55°C 4 Air 352 38
17-4PH H1075 85°C 4 Air 341 36
17-4PH H1100 595°C 4 Air 332 35
17-4PH H1150 621°C 4 Air 311 33
17-4PH (H1150+H1150, Double Aged H1150)


followed by




17-4PH (H1150-M)


followed by





Mechanical Properties of 17.4PH / SUS 630 (longitudinal)

  17-4PH Annealed 17-4PH (H900) 17-4PH (H925) 17-4PH (H1025) 17-4PH (H1075) 17-4PH (H1100) 17-4PH (H1150) 17-4PH (H1150+  
H1150, Double Aged)
  17-4PH (H1150M)   
Tensile Strength
 1034    1380     1310      1170     1140     1035     1000   965 860
0.2% YS
760 1275 1200 1140 1035 930 860 760 585
Reduction of Area
30-60 50 54 56 58 58 60 60 68
6-15 14 14 15 16 17 19 20 22
Charpy Impact
20 34 47 54 61 68 108 135

Corrosion Resistance of 17-4PH Stainless Steel 

17.4PH stainless steel has excellent corrosion resistance. Corrosion tests and service experience have shown that in all aged conditions it is superior to standard hardenable stainless grades such as SUS 420, SUS 431 and SUS 410. Its corrosion resistance is comparable to grade SUS 304 Stainless.


Arc and resistance welding processes used on standard grades of stainless steel are applicable to 17.4 PH stainless steel. The low hardness enables sections, up to 100mm, to be welded without requiring pre heating.


17/4PH Condition is suitable for limited cold forming, H1100, H1150 and overaged conditions are more suitable when severe cold forming is required.


17/4 PH Condition has machining characteristics similar to stainless steel grade SS302, SS304 and SS410. The high hardness and strength in Condition H900 is the most difficult to machine and the material should be machined at 60% of the rate which is used for Condition A.


To increase the resistance to surface wear, with a slight decrease in corrosion resistance, 17-4PH / SUS630 stainless steel can be nitrided. An approximate hardness of 64/67HRc can be achieved, with a surface hardness depth of up to 0.15mm when nitrided at 45°C, while still maintaining a high core strength.

Applications for 630 Stainless Steel (17-4PH) 

Grade 17-4 stainless steel is used in the following applications:
  • Nuclear reactor
  • Aircraft and gas turbines
  • Oil field
  • Chemical process components
  • Paper mill

Our Sales & Supplier Network

Australia, Pakistan,  Malaysia, Singapore, Taiwan, China,Vietnam, Belgium, Japan, South Korea, Philippines, France, United Kingdom, Indonesia, Thailand, Hong Kong, China, Sweden, United States, Dubai, Finland, Brunei,Germany.

E Steel is a Global Metal Procurement Company in providing and sourcing raw materials to the wide range of engineering industries / sectors.  We works as the the Online B2B Metal Marketplace to help our customers in finding the special steels that might feel hard to source locally. 


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