AISI 630 17-4PH Stainless Steel Plate

After aging treatment with copper-niobium precipitation strengthening mechanism, the tensile strength of stainless steel 630 alloy plate can reach more than 1310MPa (about 2.5 times that of 304 stainless steel), while still maintaining an elongation of more than 10%, meeting the stringent load requirements of aerospace fasteners, high-pressure valves, etc. Its fatigue strength can reach 500MPa under 10⁷ cycles, which is suitable for mechanical structures with frequent vibrations.

In marine or chemical media containing chloride ions, the corrosion resistance of 630 stainless steel plate is close to that of 316L stainless steel, with an annual corrosion rate of <0.02mm. After cold bending, the strength can be increased by 20%, which is suitable for manufacturing complex parts such as helicopter decks and pressure vessels.

630 stainless steel cold-rolled plate is 30%-50% lower in cost than nickel-based alloys, and can still maintain more than 80% of high-temperature strength under working conditions below 600℃, and can reduce 40% of weight by replacing traditional high-strength steel.

specification

Product name	630  stainless steel  plate
Surface	2B 2D BA(bright annealed) No.1 8K HL(Hair Line) PVC
Size	Width:800mm---1800mm . Length :2440mm,3000mm , 6000mm ,Thickness:2mm--8mm
Standard	AISI, ASTM, GB,BS,EN,JIS,DIN

Chemical Composition Of 630 Plate

Grade		C	Mn	Si	P	S	Cr	Ni	Cu	Nb+Ta
630	min. max	- 0.07	- 1	- 1	- 0.04	- 0.030	15 17.5	3 5	3 5	0.15 0.45

Mechanical Properties Of 630 Stainless Steel  Rolling Sheet

Condition	Tensile Strength (MPa)	Yield Strength 0.2% Proof (MPa)	Elongation (% in 50mm)	Hardness
				Rockwell C (HR C)	Brinell (HB)
Solution Treated	1105 typ	1000 typ	15 typ	38 max	363 max
Condition 900	1310 min	1170 min	10 min	40 min	388 min
Condition 1150	930 min	724 min	16 min	28 min	277 min

17-4PH heat treatment H900 H1025

Condition	Typical Hardness	Yield Strength (MPa)	Application
H900	40 HRC	~1170 MPa	Aerospace, valves
H1025	35 HRC	~1035 MPa	Chemical equipment
H1150	28 HRC	~930 MPa	Power plants, marine

17-4PH vs 304 Stainless Steel

Property	17-4PH (630)	304 SS
Strength	Much higher	Lower
Hardness	High (HRC 28–44)	Low (HRC ~20)
Corrosion Resistance	Good	Excellent
Heat Treatment	Precipitation hardening	Not hardenable

 Why Choose Gnee as Your 630 Stainless Steel Plate Supplier?

✅ ISO 9001 Certified Factory
✅ Global export to 60+ countries
✅ Full traceability & mill test certificates
✅ Custom cutting, edge processing, and packaging
✅ Competitive 17-4PH stainless steel plate price

 

Services include polishing, laser cutting, waterjet cutting, plasma cutting, saw cutting, and milling. Get your stainless steel plate cut to size with precision using advanced cutting technologies.