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Corona SteelGegründet 1955
Resources/Materials & grades/S350GD / 1.0529

Materials & grades

S350GD+Z / 1.0529 structural galvanized steel sheet (EN 10346; ASTM A653 SS Grade 50, IS 277 GP350, JIS SGC440/SGC490)

S350GD+Z (1.0529) is the structural quality of hot-dip galvanized steel in EN 10346, with a minimum yield of 350 MPa, tensile strength of at least 420 MPa and elongation of at least 16 % (A80). Its nearest names are ASTM A653 SS Grade 50, IS 277 GP350 and JIS G 3302 SGC440 or SGC490.

Names by standard

What it is called in each region

RegionSystemDesignationNormMatch
USAASTM A653/A653MSS Grade 50 Class 1Structural steel, 50 ksi (340 MPa) minimum yield and 65 ksi (450 MPa) tensile. S350GD has a 350 MPa yield but a 420 MPa tensile minimum. Classes 2, 3 and 4 share the yield and differ in tensile requirement (none, 70 ksi, 60 ksi) and phosphorus.ASTM A653/A653MClosest equivalent
ASTM A446 Grade D (legacy)Grade DWithdrawn structural galvanized sheet specification replaced by A653 SS. Salzgitter lists Grade D against S350GD (its table prints the standard as A 466 M).—Closest equivalent
UKBS EN 10346S350GD+ZThe UK adopts the European standard unchanged.BS EN 10346Same material
BS 2989 (legacy)Z35Withdrawn. Salzgitter lists Z35 as the old name for S350GD.—Equivalent
EUEN 10027-1 nameS350GD+ZS = structural steel, 350 = minimum yield in MPa, GD = hot-dip coated steel.EN 10346Same material
EN 10027-2 number1.0529Material number of S350GD.EN 10346Same material
EN 10027-1 nameS350GD+ZFSame steel with a zinc-iron (galvannealed) coating.EN 10346Equivalent
DIN 17162-2 (legacy)StE 350-2 ZSuperseded name for S350GD+Z (Salzgitter). Also listed as C 350 (NF A 36-322) and Fe E350 G (UNI 5783).—Equivalent
IndienIS 277:2018GP350 Class-1Structural grade 350: yield ≥350 MPa, tensile ≥420 MPa, A80 ≥12 %. Lower elongation than S350GD (16 %).IS 277:2018Closest equivalent
IS 277:2018GP350 Class-2Same yield as Class-1 but no tensile requirement.IS 277:2018Closest equivalent
JapanJIS G 3302SGC440Yield ≥335 MPa, tensile ≥440 MPa, elongation ≥18 %. Nearest to S350GD on yield and tensile.JIS G 3302Closest equivalent
JIS G 3302SGC490Yield ≥365 MPa, tensile ≥490 MPa, elongation ≥16 %. Stronger than S350GD; often listed as its equivalent.JIS G 3302Closest equivalent

On equivalence

  • No cross-region name is identical to S350GD. ASTM A653 SS Grade 50, IS 277 GP350 and JIS SGC440 or SGC490 are closest matches only.
  • A653 SS Grade 50 Class 1 is 340 MPa (50 ksi) yield with 450 MPa (65 ksi) tensile and 12 % elongation in 50 mm. Classes 2, 3 and 4 share the 340 MPa yield; tensile minimums are none, 480 MPa and 410 MPa. Class 3 limits phosphorus to 0.04 %.
  • JIS: SGC440 (335/440 MPa) is closer to S350GD than SGC490 (365/490 MPa), although SGC490 is the name usually listed in cross-reference charts.
  • IS 277:2018 uses GP-based names (GP230 to GP550), not YS names. GP350 Class-1 matches S350GD on yield and tensile, with A80 at 12 % against 16 %.
  • Other EN 10346 structural grades (minimum yield / tensile / A80): S220GD 220/300/20 %, S250GD 250/330/19 %, S280GD 280/360/18 %, S320GD 320/390/17 %, S390GD 390/460/16 %, S420GD 420/480/15 %, S550GD 550/560 MPa with no elongation value given.
  • Salzgitter lists old names for S350GD: StE 350-2 Z (DIN 17162-2), Grade D (printed as ASTM A 466 M), Z 35 (BS 2989), C 350 (NF A 36-322) and Fe E350 G (UNI 5783).
  • Sources differ on the phosphorus and manganese limits of A653 SS grades between editions: the U. S. Steel 2004-edition bulletin shows no manganese limit for the HDG structural grades, while the CSVC summary of A653M gives 1.35 %. Check the edition on the order.

Chemical composition

Composition limits, mass %

ElementSS Grade 50 Class 1 (heat analysis)USA · ASTM A653/A653MS350GD+Z / +ZF (cast analysis)EU · EN 10346GP350 Class-1 / Class-2Indien · IS 277:2018SGC440Japan · JIS G 3302SGC490Japan · JIS G 3302
C≤0.25≤0.20≤0.25≤0.25≤0.30
Si—≤0.60———
Mn≤1.35≤1.70≤1.35≤2.00≤2.00
P≤0.20≤0.10≤0.050≤0.20≤0.20
S≤0.04≤0.045≤0.040≤0.05≤0.05
N——≤0.012——

Mechanical properties

Strength and hardness

ConditionTensile strengthYield strengthElongationHardness
Hot-dip galvanized (S350GD+Z / +ZF)Specified minimums, ReH or Rp0.2; the A80 minimum is for thickness over 0.7 mm, reduced by 2 units for 0.5–0.7 mm and by 4 units at 0.5 mm and belowEN 10346 as tabulated by Nippon Steel Slovakia, Salzgitter and CSVC≥420 MPa≥61 ksi≥350 MPa≥51 ksi≥16 %—
Galvanized (ASTM A653 SS Grade 50 Class 1)Specified minimums; elongation in 50 mm (2 in)ASTM A653 as tabulated by U. S. Steel and CSVC≥450 MPa≥65 ksi≥340 MPa≥50 ksi≥12 %—
Galvanized (ASTM A653 SS Grade 50 Class 3)Specified minimums; phosphorus held to ≤0.04 %; elongation in 50 mm (2 in)ASTM A653 as tabulated by U. S. Steel and CSVC≥480 MPa≥70 ksi≥340 MPa≥50 ksi≥12 %—
Galvanized (IS 277 GP350 Class-1)Specified minimums; elongation Lo = 80 mm, minus 4 units at 0.5 mm and below, minus 2 units at 0.5–0.7 mmIS 277:2018, Table 2≥420 MPa≥61 ksi≥350 MPa≥51 ksi≥12 %—
Galvanized (JIS G 3302 SGC440)Specified minimums; nominal thickness 0.25 to under 2.5 mm; No. 5 test pieceJIS G 3302 as tabulated by CSVC≥440 MPa≥64 ksi≥335 MPa≥49 ksi≥18 %—
Galvanized (JIS G 3302 SGC490)Specified minimums; nominal thickness 0.25 to under 2.5 mm; No. 5 test pieceJIS G 3302 as tabulated by CSVC≥490 MPa≥71 ksi≥365 MPa≥53 ksi≥16 %—

In practice

Behaviour, heat treatment and uses

Characteristics

  • EN 10346 guarantees the yield and tensile minimums for the whole structural series, so cold-formed sections can be designed on them.
  • Carbon is limited to 0.20 % and manganese to 1.70 %; none of the mill tables used here sets a carbon-equivalent limit for this grade.
  • The standard gives no maximum yield or tensile strength for S350GD, so actual coil strength may be well above the minimums.
  • Made with zinc (+Z) or zinc-iron (+ZF) coating; the coating mass (for example Z275) is ordered separately.
  • Formed cold; its higher strength means less formability than DX51D.

Heat treatment

  • Supplied as coated, annealed strip or cut sheet; no further heat treatment is intended.
  • Zinc melts at about 420 °C, so annealing, stress relieving or hot forming after coating damages the zinc layer.
  • Welding: resistance spot and arc welding are used; extract zinc fume and follow the supplier's guidance for thin gauges.

Typische Anwendungen

  • Roll-formed purlins, rails and light-gauge framing
  • Profiled roof and floor decking
  • Racking, shelving and storage uprights
  • Cable trays, support systems and general structural sheet parts

Sheet and strip

Similar grades compared

GüteklasseC %Mn %Cr %Ni %Tensile, first listed condition
S350GD / 1.0529≤0.25≤1.35——≥420 MPa
DX51D / 1.02260.02–0.15≤0.60——270–500 MPa
DX53D / 1.0355≤0.06≤0.50——270–380 MPa
DD11 / SPHC≤0.15≤0.60≤0.15≤0.20≤440 MPa
DD12 / SPHD0.02–0.08≤0.45——≤420 MPa
DD13 / SPHE≤0.08≤0.40——≤400 MPa
S355MC≤0.23≤1.35≤0.15≤0.20430–550 MPa
DC01 / SPCC0.02–0.15≤0.60≤0.15≤0.20270–410 MPa
DC03 / SPCD0.02–0.08≤0.50≤0.15≤0.20270–370 MPa
DC04 / SPCE≤0.06≤0.50≤0.15≤0.20270–350 MPa

Composition from the US standard where one exists, otherwise the first standard listed on each grade's page. Strength conditions differ between grades; open a grade for its full table.

Fragen und Antworten

Common questions

What is the equivalent of S350GD in ASTM?

ASTM A653/A653M SS Grade 50 (Class 1, 2, 3 or 4) is the closest. Grade 50 has a 340 MPa (50 ksi) minimum yield, close to the 350 MPa of S350GD, but the tensile minimum depends on the class (450 MPa for Class 1, against 420 MPa for S350GD).

What does GD mean in S350GD?

In S350GD, S marks a structural steel, 350 is the minimum yield strength in MPa, and GD marks a steel for hot-dip coated flat products. The coating follows the name, as in S350GD+Z275.

What is the Indian equivalent of S350GD?

IS 277:2018 GP350 Class-1 is the closest: yield at least 350 MPa and tensile at least 420 MPa. Its minimum A80 is 12 %, against 16 % for S350GD, so check elongation if forming is severe.

Is SGC490 equivalent to S350GD?

It is often listed that way, but SGC490 has a 365 MPa yield and 490 MPa tensile minimum, both higher than S350GD. SGC440 (335 and 440 MPa) is closer in strength.

Is S350GD weldable?

Yes, by resistance spot and arc processes. The grade limits carbon to 0.20 % and EN 10346 gives no carbon-equivalent limit for it. The zinc coating needs fume extraction, and the weld area may need re-coating for corrosion protection.

From the Corona catalog

Products listed with S350GD / 1.0529

Pfetten & Zugstangen

C-Pfette

Höhe (H): 3-14 Zoll / 75-300 mm · Flansch (B): 2,35-3 Zoll / 60-75 mm

Technische Daten
Pfetten & Zugstangen

Z-Pfette

Höhe (H): 4-14 Zoll / 100-350 mm · Flansch (B): 2,75-3 Zoll / 60-90 mm

Technische Daten
Anfrage starten

Keep reading

DX51D / 1.0226DX51D+Z (1.0226) is the commercial-quality hot-dip galvanized sheet steel of EN 10346, used for roofing, cladding, ducting and other parts that are bent or roll-formed but not deep drawn.DX53D / 1.0355DX53D+Z (1.0355) is the deep-drawing quality of hot-dip galvanized steel in EN 10346, with a yield of 140–260 MPa, tensile strength of 270–380 MPa and at least 30 % elongation (A80).Galvanizing standardsHot-dip galvanizing is specified by ASTM A123 (fabrications), A153 (hardware) and A767 (rebar) in the USA, EN ISO 1461 in the UK and EU, IS 4759 in India and JIS H 8641 in Japan.Structural steel gradesStructural steel grades in the USA, UK, EU, India and Japan line up by minimum yield strength: about 250 MPa (A36, S235/S275, E250, SS400), about 350 MPa (A572 Grade 50 / A992, S355, E350, SM490) and about 410–450 MPa (A572 Grade 60/65, S450, E410/E450, SM570).S355MCS355MC (1.0976) is a thermomechanically rolled high-strength steel strip to EN 10149-2 with a minimum yield of 355 MPa, made for cold forming and bending.A572 Grade 50ASTM A572 Grade 50 is a high-strength low-alloy structural steel with a minimum yield of 345 MPa (50 ksi) and a minimum tensile strength of 450 MPa (65 ksi).EN 10027 names and numbersEuropean steels carry two identifiers under EN 10027: a steel name (Part 1) such as S235JR, C45 or 42CrMo4 that describes the steel's use or chemistry, and a material number (Part 2) such as 1.0503 or 1.7225.JIS steel designationsJapanese JIS steel symbols start with S for steel and add letters for the steel family or its use, but the number means different things in different standards.

References

Sources

  1. Nippon Steel Slovakia: EN 10346 structural steels (S220GD to S350GD) — Composition (heat analysis) and minimum ReH, Rm, A80.
  2. Salzgitter Flachstahl: StronSal coated structural steels — S220GD to S550GD with material numbers, minimum properties and old DIN, BS 2989, NF and UNI names.
  3. China Steel and Nippon Steel Vietnam: hot-dip zinc-coated steel coils product manual — JIS G 3302, ASTM A653 and EN 10346 tables side by side, including coating masses.
  4. IS 277:2018 Galvanized steel strips and sheets, plain and corrugated (public copy) — Grade chemistry, mechanical properties and coating classes (Tables 1 to 4).
  5. U. S. Steel Technical Bulletin TSB 4.1: ASTM designations for steel properties of hot-dip galvanized and Galvalume sheet — A653 chemistry and mechanical tables as of the 2004 edition; CS, FS, DDS, SS grades.
  6. BSI: BS EN 10346 Continuously hot-dip coated steel flat products, technical delivery conditions — Scope and title of the standard; the figures below come from the mill datasheets.
  7. ASTM A653/A653M Steel sheet, zinc-coated (galvanized) or zinc-iron alloy-coated (galvannealed) by the hot-dip process — Standard record; mechanical and chemical figures taken from the U. S. Steel and CSVC summaries.
  8. JIS G 3302 Hot-dip zinc-coated steel sheets and coils (2019 edition, preview) — Preview pages only; grade values are taken from the CSVC product manual.

Values summarize published limits and typical data. The governing standard and the current edition control; check them before specifying.