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17-4PH Precipitation Hardening Stainless Steel Bar with Chromium Nickel Copper and OD 6-300mm

Certification	ISO, AISI, ASTM, EN, DIN, JIS
Minimum Order Quantity	50 kg
Price	US $3.42-3.91 / kg

Product Details

Model NO.	17-4PH/630	Shape	Round
Technique	Hot Rolled	Surface Treatment	Bright
Specification	OD 6-300mm	Diameter	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
Specific Heat	460 J/kg.K
Highlight	Precipitation Hardening 17-4PH Stainless Steel Bar , Chromium Nickel Copper UNS S17400 Round Bar , OD 6-300mm 630 Stainless Steel Bar

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Product Description

UNS S17400 Precipitation Hardening Stainless Steel Bar

17-4PH stainless steel is a chromium-nickel-copper precipitation hardening martensitic stainless steel designed for applications requiring high strength and moderate corrosion resistance. This material 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
Service	Cutting, surface polishing, heat treatment
Brand	Walsin, BAOSTEEL, TISCO, QINGSHAN

Material Properties

Alloy 17-4 PH is a precipitation hardening martensitic stainless steel with copper and niobium 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

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

Element	Content (%)
C	0.07 max
Mn	1.0 max
Si	1.0 max
P	0.04 max
S	0.030 max
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
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	7750 kg/m³
Thermal Conductivity at 100°C	18.4 W/m·K
Thermal Conductivity at 500°C	22.7 W/m·K
Specific Heat 0-100°C	460 J/kg·K
Electrical Resistivity	800 nΩ·m

Corrosion Resistance

Alloy 17-4 PH withstands corrosive attacks better than standard hardenable stainless steels and is comparable to Alloy 304 in most media. For optimal resistance to stress corrosion cracking, aging temperatures above 1022°F (550°C) are recommended.

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, with shrinkage varying by condition.

Applications