17-4PH, AISI 630, 1.4542 and SUS630 Stainless Steel Bars

Short Answer for 17-4PH and 630 Stainless Bar Buyers

Junxiong Metal can review precipitation-hardening stainless steel bar enquiries using 17-4PH, AISI 630, UNS S17400, EN 1.4542 or SUS630 terms. A valid RFQ must state the governing standard, product form, dimensions, tolerance, supplied heat-treatment condition, required properties, surface, quantity, destination and MTC requirements.

17-4PH, AISI 630, UNS S17400, 1.4542 and SUS630 form a widely used international comparison cluster. The names alone do not define the same delivery condition or guaranteed properties. The order standard and specified solution or ageing condition control acceptance.

Send a complete 17-4PH, 630 or 1.4542 factory RFQ or send the grade, standard, shape, size, condition and quantity by WhatsApp.

Representative Junxiong Stainless Bar and Packing Images

Representative Junxiong cold drawn round bar surface for 17-4PH stainless bar RFQ review
Representative Junxiong cold-drawn round-bar form. This photograph does not identify a 17-4PH, 630, 1.4542 or SUS630 heat or ageing condition.
Representative Junxiong export packing for stainless round steel bars
Representative export packing for round bars. Confirm the grade, heat number, supplied condition, dimensions and inspection documents on the purchase order and MTC.

Image boundary: steel grade and precipitation-hardening condition cannot be verified from appearance. These images support product-form and packing discussions only and are not 17-4PH batch evidence.

Supply Scope and Evidence Boundary

Junxiong has confirmed commercial supply capability for this grade family. No particular H-condition, strength level, corrosion performance or stock position is promised until the buyer’s standard and heat-treatment condition are approved and order evidence is available.

Evidence boundary: a supply statement or quotation is not a shipment record, current-stock declaration, heat certificate or dimensional inspection report. Each order is confirmed against the approved specification, production route and order or batch documents.

Technical Facts Buyers Must Confirm

Decision Required RFQ information
Grade route 17-4PH, AISI 630, UNS S17400, EN 1.4542, SUS630 or another buyer-approved standard and edition.
Heat-treatment condition State solution-treated or the buyer-specified ageing condition, using the exact condition naming and requirements from the governing specification.
Property balance State required mechanical properties, hardness, corrosion environment and any magnetic or dimensional-stability considerations.
Dimensions Finished size, tolerance, straightness, surface condition, machining allowance and length tolerance.
Inspection Heat identity, MTC type, chemistry, mechanical properties, hardness, corrosion or supplementary test requirements.
Commercial data Quantity per size, repeat demand, packing, destination country, port and required delivery schedule.

Shape and RFQ Selection

Shape Buyer must state Factory review
Round bar Diameter, tolerance, straightness, surface, length and bar-feeder or machining requirements. Starting material, process route, tooling, inspection, MOQ and schedule are reviewed for the exact grade-size-condition combination.
Square bar Side size, tolerance, corner radius, twist, straightness and length. Starting material, process route, tooling, inspection, MOQ and schedule are reviewed for the exact grade-size-condition combination.
Flat bar Width, thickness, edge condition, flatness, straightness and length. Starting material, process route, tooling, inspection, MOQ and schedule are reviewed for the exact grade-size-condition combination.
Hexagonal bar Across-flats size, tolerance, twist, straightness and length. Starting material, process route, tooling, inspection, MOQ and schedule are reviewed for the exact grade-size-condition combination.
Custom profile Dimensioned drawing, critical tolerances, corner radii, datum scheme, annual demand and trial quantity. Starting material, process route, tooling, inspection, MOQ and schedule are reviewed for the exact grade-size-condition combination.

Standards and Primary Reference Sources

Reference boundary: publisher, association and mill pages support terminology and buyer verification. They are not Junxiong heat certificates and do not prove that every designation, product form or delivery condition is interchangeable.

Buyer Checklist Before Quotation

  • Exact grade designation, governing standard and standard edition.
  • Shape, finished dimensions and machining allowance.
  • Dimensional tolerance, straightness, twist and corner-radius limits.
  • Delivery and heat-treatment condition.
  • Surface condition and defect limits.
  • Exact solution or ageing condition and its governing specification.
  • MTC, heat traceability and third-party inspection requirements.
  • Quantity per size, repeat demand, destination, schedule and packing.

FAQ for 17-4PH and 630 Stainless Bar Buyers

Can Junxiong supply 17-4PH cold-finished round bar?

Junxiong can review the requirement after receiving the governing standard, diameter, tolerance, surface, supplied condition, required properties, quantity and destination.

Are 17-4PH, 630, 1.4542 and SUS630 exactly the same?

They are widely aligned for comparison, but the order standard, chemistry limits, delivery condition, tests and guaranteed properties must still be stated and checked.

Why must the H-condition or ageing condition be stated?

The grade name alone does not define the final mechanical-property balance. The exact supplied condition and acceptance criteria are essential to quotation and inspection.

Is 17-4PH a free-machining stainless grade?

No. It should not be marketed as a substitute for free-machining grades such as 303, 416 or 430F. Machining route and condition must be assessed separately.

Can an MTC show the heat-treatment condition?

The required certificate type, heat-treatment record and mechanical or hardness results should be agreed in the RFQ and order.

Related Cold Drawn Steel Pages

Send the complete 17-4PH, 630 or 1.4542 specification for factory review.

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