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High Hardness 17-7PH / S17700 Stainless Steel Bar Solid Solution SS Bars Hot

China High Hardness 17-7PH / S17700 Stainless Steel Bar Solid Solution SS Bars Hot

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High Hardness 17-7PH / S17700 Stainless Steel Bar Solid Solution SS Bars Hot

MOQ： 500 kgs
Price： 3-5 USD/Kg
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Payment Terms	T/T, Western Union
Supply Ability	50 Ton per Month
Delivery Time	5 - 10 days
Packaging Details	wooden box or water resistant paper surround
Products Name	17-7PH Stainless Steel bar
Diameter	10 - 350mm
Length	6m or cutting any length as request
Surface	black or polishing
Service	Cutting
Standard	ASTM DIN GB EN
Other products	round bar, square bar, flat bar.etc
Technique	hot rolled
Brand Name	Delta
Model Number	17-7PH
Certification	ISO 9001
Place of Origin	China

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Product Details
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Product Specification


Payment Terms	T/T, Western Union	Supply Ability	50 Ton per Month
Delivery Time	5 - 10 days	Packaging Details	wooden box or water resistant paper surround
Products Name	17-7PH Stainless Steel bar	Diameter	10 - 350mm
Length	6m or cutting any length as request	Surface	black or polishing
Service	Cutting	Standard	ASTM DIN GB EN
Other products	round bar, square bar, flat bar.etc	Technique	hot rolled
Brand Name	Delta	Model Number	17-7PH
Certification	ISO 9001	Place of Origin	China
High Light	17-7PH stainless steel bar ，S17700 hot rolled steel rod ，forged stainless steel bars

High Hardness 17-7PH / S17700 Stainless Steel Bar Solid Solution SS Bars Hot Rolled and Forged Rod

Products Specification

Products Name	17-7PH Stainless Steel Round Bar
Grade	303,303Cu,304,304L,309S,310S,310H,316L,316Ti,316H,317L,321,329,347,410,415,420, 430F,431,440A/B/C,2205,2507,904l,254SMO,253MA,CD4MCU,XM-19,17-4PH,15-5PH,17-7PH,660,C276,600,601,625,718,800,800H,825,926.etc
Products Diameter Range	φ3mm - φ350mm
Length	6m/pcs or cutting any length as request
Surface	Pickling finishing, bright finishing
Standard	ASTM JIS,GB,DIN EN
Service	Cutting
Other Shape	Square , Flat, Hexagonal, Round.etc
Loading Port	Shanghai Port
MOQ	50 kgs

High Hardness 17-7PH / S17700 Stainless Steel Bar – Solid Solution Treated, Hot Rolled & Forged Rod for Demanding Applications

Product Overview

Engineered for extreme performance, High Hardness 17-7PH (UNS S17700) Stainless Steel Bars combine exceptional strength, corrosion resistance, and thermal stability in a single precipitation-hardening alloy. Available in both hot rolled and forged forms, these solid solution–treated round bars are ideal for aerospace, defense, energy, and high-precision industrial applications where reliability under stress is non-negotiable.

Manufactured to ASTM A276, AMS 5528, and AMS 5667 specifications, our 17-7PH bars undergo controlled solid solution annealing (Condition A) as standard—ensuring optimal microstructure for subsequent aging treatments that deliver hardness levels up to 48 HRC and tensile strengths exceeding 1380 MPa (200 ksi).

Whether you require stock diameters or custom-forged geometries, our rods are precision-machined, fully traceable, and available in cut-to-length sizes to minimize waste and accelerate your production cycle.

Why 17-7PH? The Ultimate PH Stainless Steel

17-7PH (AISI 631, EN 1.4568, 07Cr17Ni7Al) is a semi-austenitic precipitation-hardening stainless steel. Unlike conventional martensitic grades, it leverages a unique heat treatment sequence to transform its structure from ductile austenite to high-strength martensite—followed by aluminum-driven precipitation hardening.

This dual-phase design enables:

Superior fatigue resistance
Excellent dimensional stability during aging
Good formability in the annealed state
Outstanding corrosion resistance—comparable to Type 304 in many environments

After proper aging (e.g., TH1050 or RH950), 17-7PH achieves mechanical properties unmatched by most stainless alloys—making it the material of choice for springs, fasteners, turbine blades, and structural components in aggressive service conditions.

Key Product Features

✅ High Hardness Capability: Up to 48 HRC after RH950 aging
✅ Dual Processing Routes: Hot rolled (for cost efficiency) or forged (for enhanced grain flow and integrity)
✅ Solid Solution Annealed (Condition A): Supplied in soft, machinable state ready for customer-specific aging
✅ Diameter Range: 10 mm – 400 mm (hot rolled); 50 mm – 600 mm (forged)
✅ Custom Lengths: From 200 mm to 6000 mm, with tight tolerance control
✅ Full Certification: Mill Test Reports (EN 10204 3.1/3.2), chemical & mechanical data included
✅ Surface Options: As-rolled, pickled, turned, or ground finish

Chemical Composition (UNS S17700 per ASTM A276)

Element	Weight %
Carbon (C)	≤ 0.09
Manganese (Mn)	≤ 1.00
Silicon (Si)	≤ 1.00
Phosphorus (P)	≤ 0.040
Sulfur (S)	≤ 0.030
Chromium (Cr)	16.0 – 18.0
Nickel (Ni)	6.50 – 7.75
Aluminum (Al)	0.75 – 1.50
Iron (Fe)	Balance

Aluminum is critical—it forms Ni₃Al precipitates during aging, delivering peak hardness without compromising toughness.

Mechanical Properties by Heat Treatment Condition

Condition	Process Summary	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Hardness (HRC)
Condition A	1040°C soln. treat, air cool	≥1035	≥345	≥20	≤22
TH1050	1040°C → air cool → 565°C/4h age	≥1310	≥1170	1–5	38–44
RH950	1040°C → air cool → -73°C → 510°C/4h age	≥1380	≥1240	1–4	44–48

Note: All bars are supplied in Condition A unless pre-aged per customer request.

Hot Rolled vs. Forged 17-7PH Bars – Comparison

Feature	Hot Rolled Bar	Forged Rod
Grain Structure	Equiaxed, moderate alignment	Directional grain flow, refined
Density & Integrity	Good	Superior (reduced porosity, inclusions)
Size Range	Ø10 – 350 mm	Ø50 – 600 mm (custom shapes possible)
Mechanical Uniformity	Standard	Enhanced, especially in transverse direction
Best For	General high-strength parts, springs, shafts	Critical aerospace/defense components, high-cycle fatigue parts
Lead Time	Shorter (stock available)	Longer (requires open-die or closed-die forging)

Typical Applications

Aerospace: Jet engine compressor blades, thrust reversers, landing gear bushings
Defense: Missile guidance housings, armor brackets, actuator rods
Energy: Downhole tools, nuclear reactor internals, steam turbine diaphragms
Industrial: High-performance springs, snap rings, precision gears, valve stems
Medical: Reusable surgical instrument frames (non-implantable)

Ordering Guide

To ensure accurate fulfillment, please provide:

Material: 17-7PH / UNS S17700
Form: Hot rolled or forged
Standard: ASTM A276, AMS 5528, AMS 5667, or custom spec
Diameter: e.g., Ø80 mm
Length: e.g., 3000 mm (custom cutting available)
Heat Treatment: As-annealed (Condition A) or pre-aged (specify TH1050/RH950)
Surface Finish: As-rolled, pickled, turned (+/-0.1 mm tolerance), or ground
Certification: MTR, PMI, ultrasonic testing (UT) upon request

Quality Assurance & Compliance

Produced in ISO 9001:2015 and AS9100 certified facilities
Full heat number traceability from melt to delivery
Optional non-destructive testing (NDT): Ultrasonic, MPI, or dye penetrant
Compliant with REACH, RoHS, and conflict minerals regulations

Frequently Asked Questions (FAQ)

Q: Can I machine 17-7PH in the as-supplied condition?
A: Yes—Condition A offers excellent machinability (similar to 304 stainless). Final aging should be done after machining to avoid distortion.

Q: What’s the difference between TH1050 and RH950?
A: TH1050 uses air cooling after conditioning; RH950 includes sub-zero treatment (-73°C), yielding higher strength and hardness but slightly lower ductility.

Q: Is forged 17-7PH worth the extra cost?
A: For mission-critical parts subject to high fatigue or impact loads—yes. Forging improves grain continuity and eliminates internal voids.

Q: Can you supply pre-aged bars?
A: Absolutely. We offer TH1050, RH950, and CH900 conditions for immediate use in assembly lines.

Conclusion

The High Hardness 17-7PH / S17700 Stainless Steel Bar—whether hot rolled or forged—delivers an unmatched blend of strength, corrosion resistance, and thermal performance. Supplied in the solid solution–treated (Condition A) state, it provides maximum flexibility for downstream processing while ensuring consistent quality across every batch.

With global logistics support, technical metallurgy assistance, and rapid lead times, we empower engineers to push the boundaries of what’s possible in high-stress environments.

Request a quote today—customize your 17-7PH bar in diameter, length, finish, and heat treatment to match your exact application needs.

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Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative... Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative...

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JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
No.283-1, Youyi Middle Road, Xishan District, Wuxi City, Jiangsu Province
https://www.stainless-strips.com/

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