GB/T 4237 06Cr13Al S11348 Stainless Steel Plate Supplier

06Cr13Al is 405 (EN 1.4002): 11.5–14.5% Cr with 0.10–0.30% aluminium. Aluminium keeps the steel ferritic so it does not harden when cooled from welding, which is why it is used for cladding and lining in refinery vessels.

How to read the name: under GB/T 20878 the leading ’06’ is the carbon code (here C ≤0.08%), then Cr13 = about 13% chromium; Al = aluminium added. S11348 is the unified numeric code (ISC) used in GB/T 4237-2015. Older drawings and Chinese buyers may still write the pre-2007 name 0Cr13Al.

SHH STEEL produces and exports ferritic stainless plate from China, works as a sales agent for leading stainless mills, and runs its own processing warehouse for cutting and surface finishing. 06Cr13Al is part of our GB/T 4237 stainless plate range; for comparison, see our AISI 405 page.

Sister grades on the same standard are listed under GB/T 4237; cold-rolled sheet of the same chemistry is ordered to GB/T 3280, and all our plate lines sit in stainless steel sheets and plates.

Values are maximum unless a range is given. The mill reports the ladle (heat) analysis on the certificate; this is the figure to compare with Table 17.

A check analysis drilled from the finished plate may differ slightly from the heat analysis. GB/T 4237 refers to GB/T 222 for the permitted deviations; the table applies them to the 06Cr13Al limits. Deviations apply to one side of a range only, never to both sides in the same heat.

Where the table says ‘by agreement’, the deviation is not tabulated for that content level and should be agreed in the contract, usually by reference to ASTM A480 Table A1.1.

Ferritic grades are tested in the annealed condition; the bend test is part of acceptance.

06Cr13Al is ferritic: it is magnetic, has lower thermal expansion and better thermal conductivity than austenitic steel, and is immune to chloride stress corrosion cracking. Those properties make it a good choice for heat exchangers, hot water tanks and exhaust parts.

The trade-off is toughness. Ferritic stainless has a ductile-brittle transition, and it moves to higher temperature with thickness and grain size. This is why ferritic plate is mostly thin; for sections above about 6 mm ask for Charpy data or bend in a warm shop.

Ferritic grades contain little or no nickel, so their price is far more stable than GB/T 4237 06Cr19Ni10 S30408 (304).

Equivalent grades are close in chemistry and properties but are never identical: limits on carbon, nitrogen and residual elements differ. For dual or multiple certification the heat must meet every standard named on the order, and we confirm that from the heat chemistry before quotation.

Related pages: AISI 405, JIS G4305 SUS405. See also our ASTM A240/A240M and JIS G4305 plate lists.

11–13% chromium ferritics resist mild atmospheres, exhaust condensates and wet abrasion far better than carbon steel, but they will show surface rust in humid or salty air.

PREN of 06Cr13Al from the GB/T 4237 limits: 11.5 – 13.0. PREN is a ranking tool for pitting in chlorides, not a guarantee; temperature, crevices, deposits and weld finish matter as much.

Intergranular corrosion testing of ferritic and martensitic plate is by agreement (GB/T 4334 or ASTM A763 practices).

Weld 11–13% Cr ferritics with low heat input. Fillers: ER409Nb for matching welds, ER309L when a tougher austenitic weld is acceptable.

Grain growth in the HAZ is the main risk; keep interpass low and avoid multiple re-heating of the same zone. Preheat is normally not needed below 6 mm.

Cutting: we cut 06Cr13Al by plasma (up to about 150 mm), laser (thin plate) or waterjet, and remove the heat-affected edge by machining where the drawing requires it.

Recommended heat treatment for 06Cr13Al (GB/T 4237-2015 Annex C): 780 – 830 °C, rapid or slow cooling.

Ferritic grades are annealed, not solution treated, and do not harden on cooling in the normal range.

The table compares 06Cr13Al with the grades buyers most often weigh it against. Strength values are GB/T 4237-2015 minimums; PREN is calculated from the minimum chemistry.

Proof strength is modest (170 MPa). For clad plate, the cladding is usually ordered under a clad-plate standard with 405 as the cladding material.

Typical uses:

• Clad layers and linings for refinery pressure vessels
• Steam turbine parts
• Heat exchanger baffles and tubes
• Annealing boxes

Buyers specifying 06Cr13Al for these jobs often compare it with GB/T 4237 06Cr13 S41008 and GB/T 4237 12Cr13 S41010; the comparison table on this page shows the differences.

International grade pages for the alternatives mentioned above: ASTM A240 Type 410S, JIS G4305 SUS410L, ASTM A240 Type 410.

Other GB/T 4237 grades buyers request alongside it: GB/T 4237 022Cr12Ni S11213, GB/T 4237 022Cr11Ti S11163.

Our warehouse cuts plate to size (plasma, laser, waterjet, saw), bevels weld edges, polishes and applies PVC protective film. Processed plate ships with the original mill heat number marked. Ask for cut pieces of other stainless steel products at the same time to consolidate freight.

Weight: plate mass in kg/m² = thickness (mm) × density (7.7 g/cm³). A 10 mm 06Cr13Al plate weighs about 77.0 kg/m²; a 1 500 × 6 000 × 10 mm plate about 693 kg.

• Heat chemical analysis on every heat; product analysis by agreement
• Tensile test (Rp0.2, Rm, A) per batch
• Hardness test
• 180° bend test
• Ultrasonic testing (NB/T 47013.3 or ASTM A578) when specified
• Positive material identification (PMI) on every plate leaving our warehouse
• Visual and dimensional inspection; third-party inspection (SGS, BV, TÜV, Intertek) at the buyer’s request

Certificates follow EN 10204 3.1 as standard. Where plate is also certified to ASME SA240 or ASTM A240, both standards are shown on one certificate.

• Standard and edition: GB/T 4237-2015
• Grade and code: 06Cr13Al (S11348); add the equivalent if dual certification is needed
• Thickness × width × length, quantity in pieces or tonnes
• Thickness tolerance class and flatness if tighter than standard
• Surface finish and protective film
• Tests beyond the standard (IGC, UT, impact, ferrite, PMI, grain size)
• Certificate type (EN 10204 3.1 / 3.2) and inspection body
• Marking, packing (wooden cases, steel pallets) and delivery terms

Send the list to SHH STEEL and we return a quotation with mill, lead time and stock options. Other grades from the same standard can be combined in one shipment; browse GB/T 4237 plate grades.

06Cr13Al is a mainstream grade at Chinese stainless mills. We supply it from our own stock and processing warehouse, and by mill order from major producers such as TISCO and Baosteel Stainless, for which we act as a sales agent. Stock plate ships in about 1–2 weeks after cutting; mill orders typically take 30–60 days depending on thickness and rolling schedule.

Every plate is traceable to its heat number, and copies of the mill certificates stay on file for repeat orders and audits. The same mills also supply our ASTM A240, ASME SA240, JIS G4305 and AISI plate ranges, so mixed-standard orders can ship together.

• Mill-direct prices with our own export documentation
• Own processing warehouse: cutting, bevelling, polishing, PVC film
• PMI and dimensional check before packing
• Mixed-grade shipments across our AISI stainless and GB/T plate ranges
• Technical answers from people who read the standard, not just the price list

SHH STEEL has exported stainless and carbon steel plate to buyers in Asia, the Middle East, Africa, Europe and the Americas.

GB/T 4237 06Cr13Al (S11348) is a 11–13% chromium ferritic plate grade, known internationally as 405. It is defined by Table 17 chemistry (C ≤ 0.08, Cr 11.50 – 14.50, Ni ≤ 0.60) and Table 22 properties of at least 170 MPa proof strength and 415 MPa tensile strength. Typical uses include clad layers and linings for refinery pressure vessels, steam turbine parts and heat exchanger baffles and tubes. Proof strength is modest (170 MPa).

Before ordering, state the standard edition, the grade name with its code, and any extra tests, so that the mill certificate matches your design documents. SHH STEEL supplies 06Cr13Al plate from stock and by mill order, cut to size and finished in our own warehouse, with EN 10204 3.1 certificates. For related grades see GB/T 4237 06Cr13 S41008 and GB/T 4237 022Cr12 S11203, our GB/T 4237 category and the AISI 405 page. Send your sizes and quantities for a quotation.