420 Stainless Steel Bar

1. Standard: GB ASTM, JIS, etc

2. Grade: Type 420 Stainless Steel

3. Diameter: 2mm-300mm

4. Shape Manufactured: Flat Bar, Square Bar,
Round Bar,Hex Bar and special shapes.

5. Length: 2.00m-6.00m or as customers’ request

6. Surface finish: #4 polish, #6 polish, #7 polish, and #8 mirror finish

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Grade 420 stainless steel is a higher carbon version of 410; like most non-stainless steels it can be hardened by heat treatment. It contains a minimum of 12 per cent chromium, just sufficient to give corrosion resistance properties. It has goodductility in the annealed condition but is capable of being hardened up to Rockwell Hardness 50HRC, the highest hardness of the 12 percent chromium grade. Best corrosion resistance is when the metal is hardened and surface ground or polished.

Yieh United Co. has the stainless steel bar products you need positioned in large depots to meet your demand. Yieh United Co. carries processed bars not only in different types, but also in various grades includes special free-machining grades, food industry-approved grades and materials includes low-sulfur material and dual-certified material.

The normal stock of stainless bar is around 20,000 tons, which ensure the delivery time and flexible choice for our customers.

Product Name Grade Size Finish Quote
Stainless Steel Round Bar 420 Dia: 1.5mm-660mm Black & Pickled & Bright Get A Quote
Stainless Steel Flat Bar 420 thickness: 3mm-25mm
width: 12mm-305mm
stock length: 2mm-10mm
Black & Pickled & Bright Get A Quote
Stainless Steel Square Bar 420 thickness:4mm-100mm (larger sizes available upon request) Black & Pickled & Bright Get A Quote
Stainless Steel Hex bar 420 thickness:4mm -76mm (larger sizes available upon request) Cold rolled, bright surface, some
need to do
heattreatment properly according to customer’s
Get A Quote
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You can select a number of processing options to produce stainless steel bars to their exact specification, reducing material costs, production time, scrap and internal handling.

Long Porduct Processing Service Overview
Bar Cutting Thickness range is 1/16'' to 28'' diameter. Products cut include round bar, flat bar, hex bar, square bar, tubing and hollow bar, pipe, angles, channles, beams and tees,
Bar Production Cutting Yieh United can provide production cutting for product diameter up to 4''. We utilize our production equipment to achieve these precision cuts with tight tolerances. All products can be cut to exact requirements.
Bar Polishing Round bar, square bar, hex & flat bar, angles, other shapes including tubular products have OD & ID polishing available.
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  • Polishing: can polish any stainless steel bar item to a #4 polish, #6 polish, #7 polish, or a #8 mirror finish. Stainless steel polished bar can also be cut to size.
  • Heatreating & Annealing: some grades of stainless steel bars can be heatreated to change the mechanical properties. Precipitation hardening stainless steel such as 17-4ph can be heattreated. 410 stainless steel bar can also be heatreated.
  • Multiple cutting stations allow us to ship cut stainless bar to size when you need it.
  • Grinding and polishing available upon request.
  • Special heat treat requirement can also be supplied.
  • Stainless round bars can also be polished or center-less ground to exact tolerance.
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Chemical Composition

Typical compositional ranges for grade 420 stainless steel are given in table 1.

Table 1. Composition ranges for 420 grade stainless steel

Grade C Mn Si P S Cr Mo Ni N
420 min. max. 0.15 - - 1.00 - 1.00 - 0.040 - 0.030 12.0~14.0 - - -

Mechanical Properties

Typical mechanical properties for grade 420 stainless steels are given in table 2.

Table 2. Mechanical properties of 420 grade stainless steel

Temperature (°C)
Yield Strength
0.2% Proof (MPa)
(% in 50mm)
Charpy V (J)
Annealed * 655 345 25 241 max -
204 1600 1360 12 444 20
316 1580 1365 14 444 19
427 1620 1420 10 461 #
538 1305 1095 15 375 #
593 1035 810 18 302 22
650 895 680 20 262 42
* Annealed tensile properties are typical for Condition A of ASTM A276;
annealed hardness is the specified maximum.# Due to associated low impact resistance this steel should not be tempered in
the range 425-600°C

Physical Properties

Typical physical properties for annealed grade 420 stainless steel are given in table 3.

Table 3. Physical properties of 420 grade stainless steel in the annealed condition

Grade Density
Mean Coefficient
of Thermal Expansion
Heat 0-100°C
0-100°C 0-315°C 0-538°C at 100°C at 500°C
420 7750 200 10.3 10.8 11.7 24.9 - 460 550

Grade Specification Comparison

Approximate grade comparisons for 420 stainless steels are given in table 4.

Table 4. Grade specifications for 420 grade stainless steel

Grade UNS No Old
Euronorm Swedish SS Japanese JIS
BS En No Name
420 S42000 420S37 56C 1.4021 X20Cr13 2303 SUS 420J1
These comparisons are approximate only. The list is intended as a comparison of functionally similar
materials not as a schedule of contractual equivalents. If exact equivalents are needed original
specifications must be consulted.


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