GB/T 4237 12Cr17Ni7 S30110 Stainless Steel Plate Supplier
12Cr17Ni7 S30110 plate at a glance
12Cr17Ni7 is 301, the lean-nickel austenitic grade (Ni 6.00–8.00%) designed to transform partly to martensite when cold worked. Annealed plate meets 205 MPa proof and 515 MPa tensile; after rolling or forming the strength climbs steeply.
How to read the name: under GB/T 20878 the leading ’12’ is the carbon code (here C ≤0.15%), then Cr17 = about 17% chromium; Ni7 = about 7% nickel. S30110 is the unified numeric code (ISC) used in GB/T 4237-2015. Older drawings and Chinese buyers may still write the pre-2007 name 1Cr17Ni7.
SHH STEEL produces and exports austenitic stainless plate from China, works as a sales agent for leading stainless mills, and runs its own processing warehouse for cutting and surface finishing. 12Cr17Ni7 is part of our GB/T 4237 stainless plate range; for comparison, see our ASTM A240 Type 301 page.
GB/T 4237 12Cr17Ni7 specification details
| Item | GB/T 4237-2015 requirement / SHH STEEL supply |
|---|---|
| Standard | GB/T 4237-2015 Hot rolled stainless steel plate, sheet and strip (current edition, replaces GB/T 4237-2007) |
| Grade / unified code | 12Cr17Ni7 / S30110 |
| Steel class | Austenitic |
| Chemical composition | Table 15 (heat analysis); product analysis per GB/T 222 |
| Mechanical properties | Table 20 |
| Product forms | Hot-rolled thick plate (3.0 – 200 mm in the standard), hot-rolled wide strip and cut plate (2.0 – 25.4 mm) |
| Our usual thickness range | 3 – 120 mm (to 200 mm by mill order) |
| Delivery condition | ≥ 1 040 °C, water quench or other rapid cooling |
| Surface | Hot rolled, heat treated, pickled (No.1 / 1D) as standard; ground or polished by agreement |
| Density | 7.93 g/cm³ |
| Certificate | EN 10204 3.1 mill certificate; 3.2 with third-party inspection on request |
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.
12Cr17Ni7 chemical composition (heat analysis)
| Element | 12Cr17Ni7 heat analysis, % (Table 15) | Why it matters |
|---|---|---|
| C | ≤ 0.15 | Carbon. Low values protect welds from carbide precipitation; higher values add hot strength or hardenability. |
| Si | ≤ 1.00 | Silicon. Deoxidizer; in heat-resistant grades it builds a protective scale. |
| Mn | ≤ 2.00 | Manganese. Deoxidizer; in Mn-bearing grades it replaces nickel and keeps nitrogen in solution. |
| P | ≤ 0.045 | Phosphorus. Impurity, kept low for toughness and weld cracking resistance. |
| S | ≤ 0.030 | Sulfur. Impurity; low sulfur improves pitting resistance, hot workability and polishability. |
| Cr | 16.00 – 18.00 | Chromium. Forms the passive film; the main driver of corrosion and oxidation resistance. |
| Ni | 6.00 – 8.00 | Nickel. Stabilizes austenite, improves toughness and resistance to reducing acids. |
| N | ≤ 0.10 | Nitrogen. Strengthens, stabilizes austenite and adds pitting resistance (×16 in PREN). |
| PREN (Cr + 3.3Mo + 16N) | 16.0 – 17.0 (minimum – mid-range) | Calculated from the limits above, not a requirement of GB/T 4237 |
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 15.
Product analysis vs heat analysis
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 12Cr17Ni7 limits. Deviations apply to one side of a range only, never to both sides in the same heat.
| Element | Heat analysis limit (%) | Permitted deviation | Product analysis limit (%) |
|---|---|---|---|
| C | ≤ 0.15 | ±0.01 | ≤ 0.16 |
| Si | ≤ 1.00 | ±0.05 | ≤ 1.05 |
| Mn | ≤ 2.00 | ±0.04 | ≤ 2.04 |
| P | ≤ 0.045 | +0.010 | ≤ 0.055 |
| S | ≤ 0.030 | +0.005 | ≤ 0.035 |
| Cr | 16.00 – 18.00 | ±0.20 | 15.80 – 18.20 |
| Ni | 6.00 – 8.00 | ±0.10 | 5.90 – 8.10 |
| N | ≤ 0.10 | ±0.01 | ≤ 0.11 |
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.
Mechanical properties of 12Cr17Ni7 plate
| Property | 12Cr17Ni7 (Table 20) |
|---|---|
| Proof strength Rp0.2, MPa | ≥ 205 |
| Tensile strength Rm, MPa | ≥ 515 |
| Elongation A, % | ≥ 40 |
| Hardness HBW | ≤ 217 |
| Hardness HRB | ≤ 95 |
| Hardness HV | ≤ 220 |
Strength minimums apply to solution-treated plate tested transverse to rolling. Actual mill results are usually well above these minimums and are reported on the certificate.
Which variant to order: standard, L, H or N?
The lean-nickel 17-7 and older 18-8 grades are chosen for work hardening, cold forming or non-magnetic behaviour more than for corrosion resistance.
| Grade | Order it for |
|---|---|
| 12Cr17Ni7 S30110 | Work-hardening 301, rail and springs |
| GB/T 4237 022Cr17Ni7 S30103 | Low-carbon 301L for welded car bodies |
| GB/T 4237 022Cr17Ni7N S30153 | 301LN with guaranteed nitrogen |
| GB/T 4237 12Cr18Ni9 S30210 | 302, decorative and cold-formed parts |
| GB/T 4237 10Cr18Ni12 S30510 | 305, deep drawing and non-magnetic parts |
12Cr17Ni7 sits in this family as 301.
International equivalents of 12Cr17Ni7 S30110
| Standard system | Equivalent / closest grade |
|---|---|
| China GB/T 4237-2015 | 12Cr17Ni7 (S30110) |
| Former Chinese name | 1Cr17Ni7 |
| ASTM A240/A240M | Type 301 / S30100 |
| EN 10088-2 | X10CrNi18-8 / 1.4310 |
| JIS G4304 (hot rolled) | SUS301 |
| Common name | 301 |
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: ASTM A240 Type 301, JIS G4305 SUS301, AISI 301. See also our ASTM A240/A240M and JIS G4305 plate lists.
Choosing between 12Cr17Ni7 and its neighbours
The table compares 12Cr17Ni7 with the grades buyers most often weigh it against. Strength values are GB/T 4237-2015 minimums; PREN is calculated from the minimum chemistry.
| Grade (GB/T 4237) | Key chemistry, % | PREN min | Rp0.2 min, MPa | Rm min, MPa |
|---|---|---|---|---|
| 12Cr17Ni7 S30110 | C ≤ 0.15, Cr 16.00 – 18.00, Ni 6.00 – 8.00, N ≤ 0.10 | 16.0 | 205 | 515 |
| GB/T 4237 022Cr17Ni7 S30103 | C ≤ 0.030, Cr 16.00 – 18.00, Ni 6.00 – 8.00, N ≤ 0.20 | 16.0 | 220 | 550 |
| GB/T 4237 022Cr17Ni7N S30153 | C ≤ 0.030, Cr 16.00 – 18.00, Ni 6.00 – 8.00, N 0.07 – 0.20 | 17.1 | 240 | 550 |
| GB/T 4237 12Cr18Ni9 S30210 | C ≤ 0.15, Cr 17.00 – 19.00, Ni 8.00 – 10.00, N ≤ 0.10 | 17.0 | 205 | 515 |
| GB/T 4237 06Cr19Ni10 S30408 | C ≤ 0.07, Cr 17.50 – 19.50, Ni 8.00 – 10.50, N ≤ 0.10 | 17.5 | 205 | 515 |
In plate form 301 is mostly specified for rail vehicles. Its high carbon (≤0.15%) makes welded joints sensitive to intergranular attack; for welded car bodies 022Cr17Ni7 or 022Cr17Ni7N is the better pick.
How 12Cr17Ni7 performs in corrosive service
Austenitic 18-8 grades resist atmospheric corrosion, fresh water, foods, nitric acid and most organic acids. They are vulnerable to chlorides (pitting, crevice and stress corrosion cracking above about 60 °C).
PREN of 12Cr17Ni7 from the GB/T 4237 limits: 16.0 – 17.0. PREN is a ranking tool for pitting in chlorides, not a guarantee; temperature, crevices, deposits and weld finish matter as much.
Intergranular corrosion testing is not compulsory for this grade in GB/T 4237-2015; when required, the method (GB/T 4334, ASTM A262 or A923 for duplex) and acceptance are agreed in the order.
Heat treatment and delivery condition
Recommended heat treatment for 12Cr17Ni7 (GB/T 4237-2015 Annex C): ≥ 1 040 °C, water quench or other rapid cooling.
Solution treatment dissolves carbides and restores full corrosion resistance and ductility. Hot forming should finish above about 900 °C and be followed by a new solution anneal if the part is used in corrosive service.
Fabrication guidance
Austenitic 18-8 plate welds well with every arc process (SMAW, GTAW, GMAW, SAW, FCAW). Use ER308L/E308L filler for 304 and 304L, ER347 where the joint must resist sensitization at high carbon, and ER308H for H grades.
Keep interpass temperature below about 150 °C, avoid preheat, and remove heat tint by pickling or brushing with stainless brushes. Distortion is higher than with carbon steel because thermal expansion is about 50% greater and conductivity much lower; plan tacking sequence and fixtures.
Cold forming: austenitic plate bends to tight radii (inside radius ≈ thickness for most gauges) but springs back more than carbon steel.
Surface finish and processing
| Finish | Description | Availability for this grade |
|---|---|---|
| No.1 / 1D | Hot rolled, heat treated, pickled; the GB/T 4237 standard surface | Standard |
| Shot-blasted + pickled | Uniform matte for welded structures | On request |
| No.4 / brushed | Abrasive finish, grit 150–180 | Warehouse processing, thin plate |
| HL (hairline) | Long continuous lines, decorative | Warehouse processing, thin plate |
| 8K mirror | Polished reflective finish | Warehouse processing, limited sizes |
| 2B / BA | Cold-rolled finishes (ordered as GB/T 3280 sheet, not hot-rolled plate) | Sheet only |
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.
Dimensions and plate weight
| Dimension | Typical supply |
|---|---|
| Thickness | 3 – 120 mm (to 200 mm by mill order) |
| Width | 1 000 / 1 219 / 1 250 / 1 500 / 1 800 / 2 000 mm; wider by mill order |
| Length | 2 000 / 2 438 / 3 000 / 6 000 mm or cut to size |
| Flatness | Per GB/T 4237; ≤15 mm per metre for plate up to 25 mm unless agreed tighter |
| Thickness tolerance | Per the GB/T 4237 dimensional tolerance tables (normal or higher accuracy as ordered) |
| Edge | Mill edge or cut edge |
Weight: plate mass in kg/m² = thickness (mm) × density (7.93 g/cm³). A 10 mm 12Cr17Ni7 plate weighs about 79.3 kg/m²; a 1 500 × 6 000 × 10 mm plate about 714 kg.
Typical uses of GB/T 4237 12Cr17Ni7
Typical end uses we ship this grade for:
- Railway carriage and metro body structures
- Conveyor parts and springs (from cold-worked strip)
- Automotive trim and structural brackets
- Bolts, nuts and fasteners stock
Buyers specifying 12Cr17Ni7 for these jobs often compare it with GB/T 4237 022Cr17Ni7 S30103 and GB/T 4237 06Cr19Ni10 S30408; the comparison table on this page shows the differences.
International grade pages for the alternatives mentioned above: JIS G4305 SUS301L, AISI 301LN, AISI 302, ASTM A240 Type 304.
Inspection, tests and mill certificates
- Heat chemical analysis on every heat; product analysis by agreement
- Tensile test (Rp0.2, Rm, A) per batch
- Hardness 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.
What to put on a 12Cr17Ni7 purchase order
- Standard and edition: GB/T 4237-2015
- Grade and code: 12Cr17Ni7 (S30110); 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.
Supply chain and lead time
12Cr17Ni7 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.
Why buy from SHH STEEL
- 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.
FAQ
- Is 12Cr17Ni7 magnetic?
- Annealed 12Cr17Ni7 (301) is essentially non-magnetic, but it is designed to form strain-induced martensite. After cold rolling or forming it becomes noticeably magnetic, more so than 304, because nickel is only 6.00–8.00%.
- What is the chemical composition of 12Cr17Ni7?
- Under GB/T 4237-2015 Table 15, 12Cr17Ni7 (S30110) has C ≤ 0.15, Cr 16.00 – 18.00, Ni 6.00 – 8.00, N ≤ 0.10. Phosphorus is limited to ≤0.045% and sulfur to ≤0.030%.
- What is the ASTM equivalent of 12Cr17Ni7?
- The closest equivalents of 12Cr17Ni7 (S30110) are Type 301 / S30100 in ASTM, X10CrNi18-8 / 1.4310 in EN, SUS301 in JIS (common name: 301). Chemistry limits differ slightly, so dual certification depends on the actual heat.
- What are the mechanical properties of 12Cr17Ni7 plate?
- GB/T 4237-2015 Table 20 requires for 12Cr17Ni7: proof strength Rp0.2 ≥205 MPa, tensile strength ≥515 MPa and elongation ≥40%, hardness ≤217 HBW. Values apply to plate in the delivery heat-treated condition.
- What thickness of 12Cr17Ni7 plate can you supply?
- Under GB/T 4237 we supply 12Cr17Ni7 hot-rolled plate in 3 – 120 mm (to 200 mm by mill order), widths up to 2 000 mm (wider by mill order), cut to size in our warehouse. Thinner material is cold-rolled sheet to GB/T 3280.
- How much does a 12Cr17Ni7 plate weigh?
- Multiply thickness in mm by the density 7.93 g/cm³ to get kg/m². A 10 mm plate weighs about 79.3 kg/m², so a 1 500 × 6 000 × 10 mm sheet weighs about 714 kg.
Conclusion
GB/T 4237 12Cr17Ni7 (S30110) is a 18-8 chromium-nickel austenitic plate grade, known internationally as 301. It is defined by Table 15 chemistry (C ≤ 0.15, Cr 16.00 – 18.00, Ni 6.00 – 8.00, N ≤ 0.10) and Table 20 properties of at least 205 MPa proof strength and 515 MPa tensile strength. Typical uses include railway carriage and metro body structures, conveyor parts and springs and automotive trim and structural brackets. In plate form 301 is mostly specified for rail vehicles.
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 12Cr17Ni7 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 022Cr17Ni7 S30103 and GB/T 4237 022Cr17Ni7N S30153, our GB/T 4237 category and the ASTM A240 Type 301 page. Send your sizes and quantities for a quotation.
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