Excellent Mechanical Properties 17-7pH Cold Drawn Stainless Alloy Steel Coil/Strip

• Customization: Available
• Standard: ASTM, JIS, GB, AISI, DIN
• Surface Treatment: Polished
• Model NO.: 17-7PH Coil/Strip
• Application: Boiler Plate
• Edge: Slit edge
• Stock: Stock
• Key Words: 17-7pH Coil/Strip
• Outside Diameter: 4mm - 1219mm
• Thickness: 0.5 -100mm
• Length: as Your Requirments
• Diameter Tolerance: H9, H11, H13, K9, K11, K13 etc
• Sample: Free-Sample
• Surface: Lack, Peeled, Polishing, Bright, Sand Blast, Hl
• MOQ: 100kgs
• Transport Package: Wooden Package
• Specification: 17-7PH
• Trademark: LORK
• Origin: China
• HS Code: 7219350000
• Production Capacity: 50000kg/Month

Product Description

Product Description

Introduction

LORK is a special stainless steel manufacturer with 20 years of manufacturing experience.
 

One of the most frequently used in the the aerospace industry and when meticulous, elaborate parts are needed, 17-7 PH stainless steel is a common choice.
A stable, chromium-nickel-aluminum steel, 17-7 is a precipitation hardening steel with a high strength and moderately resistant to corrosion. In terms of corrosion resistance, 17-7 PH is comparable to 304 stainless steel and a better choice when compared to the 400 series of stainless steel.

17-7 PH is further strengthened by a low temperature precipitation hardening treatment (also termed aging). The industry standard is to age Condition R material at 950°F for one hour, resulting in an end condition of RH 950. Condition T material is aged at 1050°F for 90 minutes, resulting in an end condition of TH 1050. Typical room temperature mechanical properties are listed in Table 2. Very high strength properties are obtained. TH 1050 provides more ductility at a reduced strength level.

Duplex Stainless 17-7PH Applications

Grade 17-7 stainless steel is mostly found in washers and springs.
It is used in applications which require high strength and corrosion resistance
It is also used in intricate parts due its low distortion on heat treatment.
 

Weldability

Grade 17-7 stainless steel can be welded using arc and resistance welding techniques. Inert gas shielding is preferred during fusion welding in order to reduce oxidation of aluminum. It is not necessary to perform pre-heating and post-weld annealing processes.

Annealing
Grade 17-7 stainless steel is annealed at 1066°C (1950°F) for 3 min for 0.1 in. (2.5 mm) of thickness followed by air cooling.

Aging

Aging of grade 17-7 stainless steel can be done at 1177°C (2150°F) for 4 h followed by cooling. This process is followed by heating at 1078°C (1975°F) for 4 h and cooling. It is again heated at 844°C (1550°F) for 24 h and cooled, and heated at 760°C (1400°F) for 16 h followed by cooling to complete precipitation hardening process.
Cold Working
Grade 17-7 stainless steel can be easily cold worked using common methods in the condition A.

Hot Working
Solution treated material is heavily cold worked which results in condition C material.
Condition C material is heated at 482°C (900°F) for 1 h in condition CH900 followed by cooling. Solution treated material is heated at 955°C (1750°F) for 10 min after fabrication in condition A1750 followed by rapidly cooling at room temperature.
Within 1 h of treating to condition A1750, it is cooled at -73°C (-100°F) for 8 h in condition R100. It is then heated at 510°C (950°F) for 90 min in condition RH 950 followed by cooling. After fabrication, it is heated at 760°C (1400°F) for 90 min in condition T.
Within 60 min of cooling, it is then cooled at 13°C (55°F) for 30 min. From condition T, it is heated at 565°C (1050°F) for 90 min in condition TH1050 followed by cooling.

17-7ph (631) Chemical Composition

Element	Content (%)
Iron, Fe	70 - 75%
Chromium, Cr	16.0 - 18.0
Nickel, Ni	6.50 - 7.75
Silicon, Si	1.0
Manganese, Mn	1.0
Aluminum, Al	0.75 - 1.50
Carbon, C	0.090
Sulfur, S	0.040
Phosphorous, P	0.040

 

17-7PH Mechanical Properties

 

Properties	Metric	Imperial
Tensile strength	1275 MPa	184900 psi
Yield strength	1030 MPa	149000 psi
Fracture toughness (longitudinal, 44 HRC)	76 MPa-m½	69.2 ksi-in½
Elastic modulus	204 GPa	29588 ksi
Poisson's ratio	0.27-0.30	0.27-0.30
Elongation at break	6%	6%
Reduction of area	10%	10%
Hardness, Rockwell C	41	41

 

Available Sizes And Specifications

631 stainless steel profile sizes and specifications
Grade	631
Specification	EN, DIN, JIS, ASTM, BS, ASME, AISI, ISO
Standard	ASTM A276/ASME SA276, ASTM A479/ASME SA479 & ASTM A164/ASME SA164 .
Stainless steel round Bar	Diameter: 2mm - 600mm
Stainless steel bright Bar	Diameter: 2mm - 600mm
Stainless steel hex Bar	Dimension: 6mm - 80mm
Stainless steel square bar	Dimension: 3.0 - 180mm
Stainless steel flat bar	Thickness: 0.5mm - 200mm, Width: 1.5mm - 250 mm
Stainless steel angle bar	as requirements
Length	Normally 6m, or produce as requirements
Surface	Black, Bright. Peeled and Polished, Solution annealed.
Delivery condition	cold drawn, hot rolled, forged, grinding, centerless grinding
Tolerance	H8, H9, H10, H11, H12, H13,K9, K10, K11, K12 or as per clients' requirements

surface

Processing

 

Main Applications

Company Profile

Packaging & Shipping

 

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