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17-4PH Alloy Stainless Steel Round Bar Hot Rolled with Bright Surface for High Strength Applications

Certification	ISO, AISI, ASTM, EN, DIN, JIS
Minimum Order Quantity	50 kg
Price	US $3.34-3.83 / kg

Product Details

Model NO.	17-4PH/630	Shape	Round
Technique	Hot Rolled	Surface Treatment	Bright
Specification	OD 6-300mm	Production Capacity	50000kgs
Diameter	8 - 450mm	Length	6m /pcs Or Cutting As Request
Main Grade	201 301 303Cu 304 304L 309S 310S 316L 316Ti 317L 318 321 347 410 420 430 431 440a/b/c 904L 2205 2507	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
Highlight	17-4PH Alloy Stainless Steel Round Bar , Hot Rolled Stainless Steel Round Bar , Bright Surface Stainless Steel Round Bar

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Product Description

UNSS17400 17-4 PH Alloy Stainless Steel Round Bar

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.

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.
Services	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 with heat treatment, achieving very high yield strength up to 1100-1300 MPa (160-190 ksi).

Applications

Offshore applications (foils, helicopter deck platforms)
Food industry equipment
Pulp and paper industry machinery
Aerospace components (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

Element	Min (%)	Max (%)
C	-	0.07
Mn	-	1.0
Si	-	1.0
P	-	0.04
S	-	0.030
Cr	15.0	17.5
Ni	3.0	5.0
Cu	3.0	5.0
Nb+Ta	0.15	0.45

Mechanical Properties

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

Physical Properties

Property	Value
Density (kg/m³)	7750
Thermal Conductivity at 100°C (W/m.K)	18.4
Thermal Conductivity at 500°C (W/m.K)	22.7
Specific Heat 0-100°C (J/kg.K)	460
Electrical Resistivity (nΩ.m)	800
Mean Coefficient of Thermal Expansion 0-100°C (µm/m/°C)	10.8

Corrosion Resistance

17-4PH stainless steel withstands corrosive attacks better than standard hardenable stainless steels and is comparable to Alloy 304 in most media. It demonstrates improved resistance against stress corrosion cracking when aged at 550°C or higher. The alloy is corrosion resistant in chemical, petroleum, paper, dairy, and food processing industries.

Heat Treatment

Solution treatment involves heating to 1040°C for 0.5 hours followed by air cooling. Age hardening at various temperatures achieves the required mechanical properties:

Condition	Hardening Temp (°C)	Time (h)	Typical Hardness (HRC)	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

Processing Characteristics

Welding

17-4PH 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

This alloy can be machined in its solution-treated condition with machining rates similar to grade 304 stainless steel.

Applications