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Hot Rolled Bright Surface 17-4PH Stainless Steel Round Bar OD 6-300mm

Certification	ISO, AISI, ASTM, EN, DIN, JIS
Minimum Order Quantity	50 kg
Price	US $3.36-3.85 / kg

Product Details

Model Number	17-4PH/630	Shape	Round
Technique	Hot Rolled	Surface Treatment	Bright
Diameter Range	8 - 450mm	Length	6m /pcs
Tensile Strength	1105-1310 MPa	Yield Strength	1000-1170 MPa
Elongation	10-16%	Hardness	28-44 HRC
Density	7750 Kg/m³	Thermal Conductivity	18.4-22.7 W/m.K
Electrical Resistivity	800 NΩ.m	Max Temperature	572°F (300°C)
Composition Cr	15-17.5%
Highlight	Hot Rolled Stainless Steel Round Bar , Bright Surface 17-4PH Round Bar , OD 6-300mm 630 Stainless Steel Bar

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Product Description

Forged Stainless Steel Round Bar Grade F630 SS Bar 17-4PH 1.4542

17-4PH Precipitation Hardening Stainless Steel (also known as Type 630) is a chromium-copper precipitation hardening stainless steel designed for applications requiring high strength and moderate corrosion resistance. This grade maintains high strength up to approximately 600°F (316°C).

Product Specifications

Products	17-4PH Stainless Steel Round Bar
Standard	ASTM GB DIN EN
Diameter	8 - 450mm
Length	6m /pcs or cutting as requested
Finishing	Black Bar / Bright Bar
Main Grades	201, 301, 303Cu, 304, 304L, 309S, 310S, 316L, 316Ti, 317L, 318, 321, 347, 410, 420, 430, 431, 440a/b/c, 904L, 2205, 2507, Hastelloy C276, C4, C22, Inconel 600, 625, Incoloy 800, 825, 825H, etc.
Service	Cutting, surface polishing, heat treatment
Brand	Walsin, BAOSTEEL, TISCO, QINGSHAN

Material Description

17-4PH is a precipitation hardening martensitic stainless steel with copper and niobium additions. This grade combines high strength, hardness (up to 572°F / 300°C), and corrosion resistance. Mechanical properties can be optimized through heat treatment, achieving very high yield strength up to 1100-1300 MPa (160-190 ksi).

Applications & Standards

Applications

Offshore (foils, helicopter deck platforms, etc.)
Food industry
Pulp and paper industry
Aerospace (turbine blades, etc.)
Mechanical components
Nuclear waste casks

Standards

ASTM A693 grade 630 (AMS 5604B) UNS S17400
EURONORM 1.4542 X5CrNiCuNb 16-4
AFNOR Z5 CNU 17-4PH
DIN 1.4542

Chemical Composition

Composition of 17-4PH Stainless Steel

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

Mechanical Properties

Condition	Tensile Strength (MPa)	Yield Strength 0.2% Proof (MPa)	Elongation (% in 50mm)	Hardness Rockwell C (HR C)	Hardness 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

Physical Properties

Mean Co-eff of Thermal Expansion (µm/m/°C)	Thermal Conductivity (W/m.K)	Specific Heat 0-100°C (J/kg.K)	Electrical Resistivity (nΩ.m)
0-100°C: 10.8 0-315°C: 11.6 0-538°C: -	At 100°C: 18.4 At 500°C: 22.7	460	800

Grade Specification Comparison

Grade	UNS No	Euronorm	Japanese JIS
630	S17400	1.4542 X5CrNiCuNb16-4	SUS 630

Alternative Grades

Grade	Reasons for choosing 17/4PH (630)
431	431 Has higher toughness than 17/4PH. Better availability in some sizes.
416	Free-machining martensitic stainless steel - better for repetition machining. Lower cost.
316	Higher corrosion resistance of 316 to resist more severe environments, but with much lower strength than 17/4PH.
2205	Much better corrosion resistance than 17/4PH, with a lower strength (but not as low as 316).

Corrosion Resistance

Grade 630 stainless steels offer good corrosion resistance in many environments and demonstrate improved resistance against stress corrosion cracking when aged at 550°C or higher. However, these steels are less resistant in solution-treated Condition A and should not be used in this condition despite their considerable hardness.

Heat Treatment

Solution treatment (Condition A): Grade 630 stainless steels are heated at 1040°C for 0.5 h, then air-cooled to 30°C. Small sections can be oil quenched.
Hardening: Grade 630 stainless steels are age-hardened at low temperatures to achieve required mechanical properties. During this process, superficial discoloration occurs followed by shrinkage.

Condition	Hardening Temp (°C)	Time (h)	Typical Hardness Rockwell C	Tensile Strength (MPa)
A	Ann	-	36	1100
H900	482	1	44	-
H925	496	4	42	1170-1320
H1025	552	4	38	1070-1220
H1075	580	4	36	1000-1150
H1100	593	4	35	970-1120
H1150	621	4	33	930-1080

Fabrication

Welding: Grade 630 stainless steels can be welded using all conventional methods without requiring pre-heating. Care should be taken in designing and welding high strength steels to prevent weldment stresses.
Machining: Grade 630 stainless steels can be machined in their solution-treated condition. They have machining rates similar to grade 304 steels.

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