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Hot Rolled SUS 630 Precipitation Hardening Stainless Steel Round Bar with Bright Surface

Certification	ISO, AISI, ASTM, EN, DIN, JIS
Minimum Order Quantity	50 kg
Price	US $1.85-9.85 / kg

Product Details

Model NO.	630	Shape	Round
Technique	Hot Rolled	Surface Treatment	Bright
Specification	OD 6-300mm	Production Capacity	50000kgs
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
Specific Heat	460 J/kg.K	Electrical Resistivity	800 NΩ.m
Max Temperature	572°F (300°C)
Highlight	Precipitation Hardening Stainless Steel Round Bar , Hot Rolled SUS 630 Round Bar , Bright Surface 17-4PH Stainless Steel Bar

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Product Description

SUS 630 Precipitation Hardening Stainless Steel - JIS G4303 Round Bar

17-4PH Stainless Steel Overview

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

General Properties

Alloy 17-4 PH 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 excellent 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	Standards
Offshore (foils, helicopter deck platforms) Food industry equipment Pulp and paper industry Aerospace (turbine blades) Mechanical components Nuclear waste casks	ASTM A693 grade 630 (AMS 5604B) UNS S17400 EURONORM 1.4542 X5CrNiCuNb 16-4 AFNOR Z5 CNU 17-4PH DIN 1.4542

Corrosion Resistance

Alloy 17-4 PH provides superior corrosion resistance compared to standard hardenable stainless steels and performs comparably to Alloy 304 in most media. For stress corrosion cracking prevention, higher aging temperatures above 1022°F (550°C) are recommended. The alloy offers excellent resistance in chemical, petroleum, paper, dairy, and food processing applications.

Technical Specifications

Chemical Composition

Composition ranges for grade 630 stainless steels:

Element	Content (%)
C	0.07 max
Mn	1.00 max
Si	1.00 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

Heat Treatment

Grade 630 stainless steels undergo solution treatment at 1040°C for 0.5 hours followed by air cooling. Age hardening at low temperatures achieves required mechanical properties with minimal distortion.