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

Certification	ISO, AISI, ASTM, EN, DIN, JIS
Minimum Order Quantity	50 kg
Price	US $3.17-3.66 / kg

Product Details

Diameter Range	10 - 300mm	Length	6m /pcs
Surface Finish	Bright Bar	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 W/m.K	Specific Heat	460 J/kg.K
Electrical Resistivity	800 NΩ.m	Max Service Temp	572°F (300°C)
Coeff Thermal Expansion	10.8 µm/m/°C	Chromium Content	15 - 17.5%
Nickel Content	3 - 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

Grade 630 Stainless Steel Round Bar

Diameter range: 10 - 300mm | Also known as 17-4PH Stainless Steel

Product Specifications

Product	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 Stainless Steel (Type 630) is a chromium-copper precipitation hardening stainless steel used for applications requiring high strength and moderate corrosion resistance. High strength is maintained to approximately 600°F (316°C).

General Properties

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

Applications & Standards

Applications:

Offshore (foils, helicopter deck platforms)
Food industry
Pulp and paper industry
Aerospace (turbine blades)
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

Grade	C	Mn	Si	P	S	Cr	Ni	Cu	Nb+Ta
630	≤0.07	≤1	≤1	≤0.04	≤0.030	15-17.5	3-5	3-5	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

Property	Value
Density	7750 kg/m³
Mean Co-eff of Thermal Expansion (0-100°C)	10.8 µm/m/°C
Thermal Conductivity (at 100°C)	18.4 W/m.K
Specific Heat (0-100°C)	460 J/kg.K
Electrical Resistivity	800 nΩ.m

Grade Specifications

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

Alternative Grades Comparison

Grade	Comparison to 17-4PH
431	Higher toughness, better availability in some sizes
416	Free-machining martensitic stainless steel, better for repetition machining, lower cost
316	Higher corrosion resistance but much lower strength
2205	Much better corrosion resistance with lower strength (but not as low as 316)

Technical Characteristics

Corrosion Resistance

Grade 630 stainless steels have good corrosion resistance in many environments, comparable to Alloy 304 in most media. They exhibit improved resistance against stress corrosion cracking when aged at 550°C or higher.

Heat Resistance

Good resistance to oxidation, but long-time exposure to temperatures of 370-480°C should be avoided to prevent loss of toughness. Should not be used above age-hardening temperature to avoid reduction of hardness and mechanical properties.

Heat Treatment

Solution treatment at 1040°C for 0.5h followed by air-cooling. Age-hardening at low temperatures achieves required mechanical properties with typical shrinkage of 0.10% for condition H1150 and 0.05% for condition H900.

Welding & Machining

Can be welded using all conventional methods without pre-heating. Machining is best performed in solution-treated condition with rates similar to grade 304 steels.

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