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Hot Rolled Bright Surface 17-4PH Stainless Steel Bar with OD 6-300mm for High Strength Applications

Certification	ISO, AISI, ASTM, EN, DIN, JIS
Minimum Order Quantity	50 kg
Price	US $1.65-2.85 / kg

Product Details

Model Number	S17400	Shape	Round
Technique	Hot Rolled	Surface Treatment	Bright
Specification	OD 6-300mm	Production Capacity	50000kgs
Tensile Strength	1105 MPa	Yield Strength	1000 MPa
Elongation	15%	Hardness	38 HRC Max
Density	7750 Kg/m³	Thermal Conductivity	18.4 W/m.K
Specific Heat	460 J/kg.K	Electrical Resistivity	800 NΩ.m
Coefficient Of Thermal Expansion	10.8 µm/m/°C
Highlight	Hot Rolled Stainless Steel Bar , Bright Surface 17-4PH Stainless Steel Bar , OD 6-300mm 630 Stainless Steel Bar

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Product Description

17-4PH Stainless Steel Overview

17-4 Precipitation Hardening (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. Very high yield strength up to 1100-1300 MPa (160-190 ksi) can be achieved.

This grade should not be used at temperatures above 572°F (300°C) or at very low temperatures. It has adequate resistance to atmospheric corrosion or in diluted acids or salts where its corrosion resistance is equivalent to Alloy 304 or 430.

Applications & Standards

Applications	Standards
Offshore (foils, helicopter deck platforms, etc.) Food industry Pulp and paper industry Aerospace (turbine blades, etc.) 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 withstands corrosive attacks better than any of the standard hardenable stainless steels and is comparable to Alloy 304 in most media.

If there are potential risks of stress corrosion cracking, higher aging temperatures above 1022°F (550°C), preferably 1094°F (590°C), must be selected. 1022°F (550°C) is the optimum tempering temperature in chloride media, while 1094°F (590°C) is optimum in H2S media.

The alloy is subject to crevice or pitting attack if exposed to stagnant seawater for extended periods. It is corrosion resistant in chemical, petroleum, paper, dairy and food processing industries (equivalent to 304L grade).

Chemical Composition

Table 1: Composition ranges for grade 630 stainless steels

Element	Content (%)
C	max 0.07
Mn	max 1.00
Si	max 1.00
P	max 0.04
S	max 0.030
Cr	15.00 - 17.50
Ni	3.00 - 5.00
Cu	3.00 - 5.00
Nb+Ta	0.15 - 0.45

Mechanical Properties

Table 2: Mechanical properties of grade 630 stainless steels

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

Table 3: Typical physical properties of grade 630 stainless steels

Property	Value
Density (kg/m³)	7750
Mean Coefficient of Thermal Expansion 0-100°C (µm/m/°C)	10.8
Mean Coefficient of Thermal Expansion 0-315°C (µm/m/°C)	11.6
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

Alternative Grade Comparison

Possible alternative grades to 630 stainless steels:

431: 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 but with much lower strength than 17-4PH
2205: Much better corrosion resistance with lower strength (but not as low as 316)

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 the process, superficial discoloration occurs followed by shrinkage.

Machining & Welding

Machining: Grade 630 stainless steels can be machined in their solution-treated condition with machining rates similar to grade 304 steels.

Welding: Grade 630 stainless steels can be welded using all conventional methods without pre-heating. Care should be taken in designing and welding high strength steels to prevent weldment stresses.

Applications

Engine components
High strength and boat propeller shafts
Plastic moulding dies
Valves and gears

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Hot Rolled Bright Surface 17-4PH Stainless Steel Bar with OD 6-300mm for High Strength Applications

Hot Rolled Stainless Steel Bar

Bright Surface 17-4PH Stainless Steel Bar

OD 6-300mm 630 Stainless Steel Bar