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Hot Rolled 17-7PH 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 $3.15-4.66 / kg

Product Details

Model NO.	631	Shape	Round
Technique	Hot Rolled	Surface Treatment	Bright
Specification	OD 6-300mm	Production Capacity	50000kgs
Density	0.282 (7.81)	Modulus Of Elasticity	29.0 X 103 (200)
Electrical Resistivity	80 µΩ•cm	Thermal Conductivity	117 (16.9)
Mean Coefficient	8.5 X 10-6 (15.3)	UTS	120 (827)
0.2% YS	45 (310)	Elongation %	35
Rockwell Hardness	B85
Highlight	Hot Rolled Stainless Steel Round Bar , Bright Surface 17-7PH Stainless Steel Bar , OD 6-300mm UNS S17700 Round Bar

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Product Description

17-7PH / 631 / UNS 17700 Stainless Steel Profiles - 50mm SS Round Bar

UNS S17700 (17-7PH, AISI 631) semi-products for stainless elastic elements, engine thrust unit components, and ship shafts

Product Overview

UNS S17700 (17-7PH, AISI 631) semi-products for stainless elastic elements, engine thrust unit components, ship shafts, and related applications. Available in various product forms including plate, sheet, strip, pipe, tube, bar (round, flat, hexagon, square, shapes), wire (profile, round, flat, square), forgings, and more.

Equivalent Designations

07Cr17Ni7Al (GB/T), 17-7PH, AISI 631 (ASTM), SUS 631 (JIS), W.Nr. 1.4568, ATI 17-7™

Applications

UNS S17700 provides valuable property combinations particularly well suited for aerospace and spring applications requiring high strength. This special alloy offers benefits for applications requiring formability, high strength, and good corrosion resistance, including:

Flat springs and Belleville (conical spring) washers
Stainless elastic elements and eyelets
Clips, surgical parts, and blades
Bellows, honeycomb, and membranes
Engine thrust unit components and ship shafts
Compressor discs and strain gauges
Operating temperatures up to 600°F (316°C)

Material Overview

S17700 stainless steel is a semi-austenitic chromium-nickel-aluminum precipitation-hardening stainless steel that provides high strength and hardness, excellent fatigue properties, good corrosion resistance and minimum distortion upon heat treatment. It is easily formed in the annealed condition, then hardened to high strength levels by simple heat treatments to Conditions RH 950 and TH 1050. The exceptionally high strength of Condition CH 900 offers advantages where limited ductility and workability are permissible.

In its heat-treated condition, this alloy provides exceptional mechanical properties at temperatures up to 900°F (482°C). Its corrosion resistance in both Conditions TH 1050 and RH 950 is superior to that of hardenable chromium types. Material produced by vacuum arc or electroslag remelting is available for increased resistance to fatigue in applications subject to cyclic stresses.

Chemical Composition (wt%)

Fe	Ni	Al	Cr	Cu	C	Mn	Si	P	S
Balance	6.50-7.75	0.75-1.50	16.0-18.0	≤0.50	≤0.09	≤1.00	≤1.00	≤0.040	≤0.030

Physical Properties

Physical properties	Condition A	TH 1050	RH 950	CH 900
Density lbs./in³ (g/cm³)	0.282 (7.81)	0.276 (7.65)	0.276 (7.65)	0.277 (7.67)
Modulus of elasticity ksi (GPa)	-	29.0 x 10³ (200)	29.0 x 10³ (200)	-
Electrical resistivity µΩ•cm	80	82	83	83

Mechanical Properties

Typical Room Temperature Mechanical Properties

Property	Condition A	Condition T	TH 1050	A 1750	R 100	RH 950	Condition C	CH 900
UTS, ksi (MPa)	120 (827)	145 (1000)	200 (1379)	133 (917)	175 (1207)	230 (1586)	230 (1586)	295 (2034)
0.2% YS, ksi (MPa)	45 (310)	100 (690)	185 (1276)	42 (290)	115 (793)	210 (1448)	190 (1310)	275 (1896)
Elongation % in 2"	35	9	8	19	9	7	5	2
Rockwell Hardness	B85	C31	C43	B85	C37	C48	C44	C52

Corrosion Resistance

Corrosion resistance of S17700 stainless steel in Conditions TH 1050 and RH 950 is generally superior to standard hardenable chromium types (410, 420, 431) but not quite as good as chromium-nickel Type 304. Corrosion resistance in Condition CH 900 approaches that of Type 304 stainless steel in most environments.

Stress Corrosion Cracking in Marine Environments

Precipitation-hardening stainless steels may be subject to stress corrosion cracking when stressed and exposed to corrosive environments. Testing in marine atmospheres shows S17700 has the greatest resistance to stress cracking in Condition CH 900. Condition TH 1050, although somewhat less resistant than CH 900, appears more resistant than Condition RH 950.

Heat Treatment

S17700 stainless steel requires three essential steps in heat treating: Austenite conditioning, cooling to transform austenite to martensite, and precipitation hardening.

Standard Heat Treatments

Procedures for heat treating material in condition A to conditions TH 1050 and RH 950.

Condition A

For in-process annealing (mill annealing), heat to 1950 ± 25°F (1066 ± 14°C) for three minutes per 0.1 in. (2.5 mm) of thickness, and air cool. This treatment restores ductility of cold-worked material for additional drawing or forming. Annealing is required for severely formed parts to be heat treated to Condition TH 1050 if full response to heat treatment is required, but unnecessary for RH 950 heat treatment.

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