Amigo Impex is a manufacturer, stockist, and supplier of Stainless Steel 17-4 PH Bars & Rods out of Mumbai, India, since 2013, and exports the grade worldwide.
17-4 PH, listed as UNS S17400 with the AISI Type 630 designation, is a copper-bearing martensitic stainless steel hardened by precipitation and supplied as 17-4 PH stainless steel bars for demanding industrial applications. Bar stock is certified to ASTM A564 / ASME SA-564, and AMS 5643 answers aerospace enquiries. The chemistry pairs roughly 17% chromium with 4% nickel, and the copper addition drives the precipitation-hardening response. Condition A arrives solution-annealed and easy to machine; one furnace cycle then takes the minimum tensile strength to 1310 MPa at H900 and settles at 930 MPa for the tougher H1150 temper. Overseas drawings often reference 1.4542 or SUS 630 for the same alloy family; where the drawing calls one of those, material is certified to that specification.
17-4 PH stainless steel bar stock includes round sections from 3 mm to 400 mm, with flat, square and hex profiles also available. Note: ASTM A564 Table 4 gives aged mechanical properties up to 200 mm (8 in.). AMS 5643 covers the alloy in the solution heat treated condition; aged properties are called out on the slash sheets (AMS5643/H900, /H1025, /H1150 and so on), which apply to product 203 mm (8 in.) and under with a maximum cross-section of 413 cm². Valve stems, pump shafts, aircraft fasteners and naval hardware are common applications for this grade. Orders leave in tagged bundles or cases with an EN 10204 3.1 mill test certificate, priced per kilogram at INR and USD rates. We are an ISO 9001:2015 and ISO 45001:2018 certified company. Aerospace stock is held and released under our AS 9120B distributor quality management system, with PED approval maintained for pressure supply.
The following parameters explain each 17-4 PH bar and rod enquiry. The table sets out shapes, size span, conditions and finishes, with governing standards broken out after it.
Bar-form specifications govern this product; flat-product specifications such as ASTM A693 do not apply to bar certification. Conformance for Type 630 bar rests on the four standards scoped here.
| Standard | Scope |
|---|---|
| ASTM A564 / A564M | Hot-rolled and cold-finished age-hardening bar and shapes |
| ASME SA-564 | Pressure-code text of A564 within Section II |
| AMS 5643 | SAE aerospace release for bar, wires, rings and forging stock |
| AMS 5622 | Same alloy as AMS 5643, but consumable-electrode remelted to premium aircraft quality. Covers bars, wire, forgings, mechanical tubing, and rings up to 203 mm. |
Niobium does the stabilising in UNS S17400 bar: 0.15 to 0.45% Nb plus Ta binds carbon, while copper at 3.00 to 5.00% forms the hardening precipitate. Limits follow SA-564 Table 1.
| Element | Limit (%) |
|---|---|
| Carbon (C) | 0.07 max |
| Manganese (Mn) | 1.00 max |
| Phosphorus (P) | 0.040 max |
| Sulphur (S) | 0.030 max |
| Silicon (Si) | 1.00 max |
| Chromium (Cr) | 15.00 to 17.50 |
| Nickel (Ni) | 3.00 to 5.00 |
| Copper (Cu) | 3.00 to 5.00 |
| Niobium + Tantalum (Nb+Ta) | 0.15 to 0.45 |
| Iron (Fe) | Balance |
The ageing condition determines the strength level of SS 17-4 PH bar, with every ageing treatment ending in air cooling.
Strength peaks at H900 and steps down as ageing temperature rises, while ductility improves. Specify H1150 where toughness or stress-corrosion margin governs; the grade isn't the pick for continuous duty above 315°C.
| Condition | Ageing Cycle | Min Tensile MPa (ksi) | Min 0.2% Yield MPa (ksi) | Min Elongation % | Hardness HRC |
|---|---|---|---|---|---|
| Condition A | Solution treated 1040 ± 15°C | ... | ... | ... | 38 max |
| H900 | 480°C, 1 h | 1310 (190) | 1170 (170) | 10 | 40 min |
| H1025 | 550°C, 4 h | 1070 (155) | 1000 (145) | 12 | 35 min |
| H1075 | 580°C, 4 h | 1000 (145) | 860 (125) | 13 | 32 min |
| H1100 | 595°C, 4 h | 965 (140) | 795 (115) | 14 | 31 min |
| H1150 | 620°C, 4 h | 930 (135) | 725 (105) | 16 | 28 min |
International drawings may identify 17 4 PH Stainless Steel bar through national designations rather than the ASTM callout. The grades below are close equivalents; EN 1.4542, for example, holds tighter silicon and sulphur limits than UNS S17400. Treat the table as a cross-reference only; a drawing calling 1.4542 needs material certified to 1.4542.
| System | Grade Designation |
|---|---|
| USA (UNS) | UNS S17400 |
| Europe (W.Nr / EN) | 1.4542 / X5CrNiCuNb16-4 |
| Japan (JIS) | SUS 630 |
| France (AFNOR) | Z6CNU17-04 |
| China (GB) | 05Cr17Ni4Cu4Nb |
The 17-4 PH stainless steel round bar takes most despatches, though flats, squares and hexagons also move steadily to machining plants. Held and produced ranges for each profile are tabled here with length options.
| Section | Measured On | Supply Range |
|---|---|---|
| Round | Diameter | 3 mm to 400 mm |
| Flat | Section Thickness | 3 mm to 120 mm |
| Square | Side Width | 4 mm to 100 mm |
| Hex | Width Across Flats (A/F) | 4 mm to 80 mm |
| All | Length | 1 m to 6 m, custom cutting |
Order names for 17-4 PH bars and rods: pair the rolled or drawn profile with its finishing route; we stock the five variants listed.
Every 17-4 PH bar that leaves from Mumbai is tagged with grade, size and heat number. Cut pieces travel in lined cases; full lengths go as steel-strapped bundles. Despatch covers PAN India, and exports serve American, Gulf, European and Asian markets. Stock moves on a 1-to-2-day despatch window; mill orders take about 30 days.
Chemistry checks, hardness surveys and gauging run on every heat of UNS S17400 rod before packing. The EN 10204 3.1 certificate logs composition, condition and results; third-party inspection is arranged when contracts ask. AS 9120B and PED approval, plus ISO 9001:2015 and ISO 45001:2018 systems, stand behind the paperwork.
17-4 PH bars and rods are priced at approximately ₹300–₹3,400 per kg in India and US$4–US$45 per kg internationally. Rates vary with diameter, profile, temper, finish, quantity, certification, and specification; AMS 5643 material generally costs more than commercial ASTM A564 supply.
Contact Amigo Impex today for 17-4 PH bars and rods pricing in INR and USD.
Request a Quote60–70 tonnes held in Mumbai, with urgent requirements dispatched within one to two days.
AS 9120B, PED, ISO 9001:2015 and ISO 45001:2018, with an MTC on every order.
Cutting, machining, threading, fabrication and testing all handled at our own Mumbai facility.
Original mill certificates plus our own test reports, so every batch can be traced back.
Non-standard sizes and specifications made to order.
Dispatched from Mumbai to every major Indian city, and exported to USA, Gulf, Europe, Asia
Available sizes for 17-4 PH bars and rods run from 3 mm to 400 mm in round section, flats to 120 mm, squares up to 100 mm and hex to 80 mm, cut from 1 m to 6 m in length.
The difference between Condition A and the H900 17-4 PH bar is the ageing step: Condition A ships solution annealed under 38 HRC, while H900 has been aged at 480°C, certifying 1310 MPa minimum tensile strength.
ASTM A564 / A564M covers 17-4 PH bars and rods as type 630; ASME SA-564 carries identical text for pressure work.
Round, flat, square and hex are the shapes 17-4 PH is supplied in; bright, black, ground, turned or cold-drawn surfaces can be ordered on each.
For shaft applications, 17-4 PH round bar delivers age-hardened yield strength far beyond anything 304 round bar reaches, since austenitic 304 can't be strengthened by heat treatment. Pick 304 where welding without post-weld heat treatment, forming, a non-magnetic structure or lower cost matters more than strength.
A 17-4 PH bar is magnetic whether annealed or aged; martensite forms the structure throughout.
A 17-4 PH bar can be machined and welded without special difficulty. Machining goes easiest before ageing, and welds need a renewed solution-anneal-and-age cycle to match parent-metal strength.
17-4 PH bars and rods are priced at approximately ₹300–₹3,400 per kg in India and US$4–US$45 per kg internationally; a dated INR or USD quotation answers each enquiry.
Machine shops across eight industries take 17-4 PH round bar for shafts, stems, fasteners and gear blanks.
