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Q255 AApplication:Engineering and welding
CategoryTypeSteel gradeCountry
Grades Special Alloy Q255 AChina

Chemical composition%of the ladle analysis of gradeQ255 A

C(%)Si(%)Mn(%)P(%)S(%)Cr(%)Ni(%)Cu(%)
0.18~0.28≤0.300.40~0.700.0450.050≤0.30≤0.30≤0.30

Mechanical properties


The yield point σ s/MPa (no less) than in steel different thickness or diameter/mm | than 16:255
The yield point σ s/MPa (no less) than in steel different thickness or diameter/mm | > 16 ~ 40:245
The yield point σ s/MPa (no less) than in steel different thickness or diameter/mm | > 40 to 60:235
The yield point σ s/MPa (no less) than in steel different thickness or diameter/mm | > 60 ~ 100:225
The yield point σ s/MPa (no less) than in steel different thickness or diameter/mm | > 100 ~ 150:215
The yield point σ s/MPa (no less) than in steel different thickness or diameter/mm | > 150:205

Tensile strength σ b/MPa: 410 ~ 550
Elongation δ 5 / (%) (no less) than in steel different thickness or diameter/mm | than 16:24
Elongation δ 5 / (%) (no less) than in steel different thickness or diameter/mm | > 16 ~ 40:23
Elongation δ 5 / (%) (no less) than in steel different thickness or diameter/mm | > 40 to 60:22
Elongation δ 5 / (%) (no less) than in steel different thickness or diameter/mm | > 60 ~ 100:21
Elongation δ 5 / (%) (no less) than in steel different thickness or diameter/mm | > 100 ~ 150:20
Elongation δ 5 / (%) (no less) than in steel different thickness or diameter/mm | > 150:19
Impact test (1) | temperature / ℃ :-
Impact test (1) | impact absorption power AKV/J:-

The cold bending property


Sample direction:-
180 ° of cold bending test b = 2 a different thickness or in steel diameter/mm | than 60: d = 2 a
180 ° of cold bending test b = 2 a different thickness or in steel diameter/mm | > 60 ~ 100: d = 3 a
180 ° of cold bending test b = 2 a different thickness or in steel diameter/mm | > 100 ~ 200: d = 3.5 a

Mechanical properties of gradeQ255 A
Proof strength
Rp0.2(MPa)
Tensile strength
Rm(MPa)
Impact energy
KV(J)
Elongation at fracture
A(%)
Reduction in cross section on fracture
Z(%)
As-Heat-Treated ConditionBrinell hardness(HBW)
727(≥)885(≥)342414Solution and Aging,Annealing,Ausaging,Q+T,etc222
Physical properties of gradeQ255 A
PropertyDensity
kg/dm3
Temperature T
°C/F
Specific heat
J/kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
458(≥)298(≥)243213Solution and Aging,Annealing,Ausaging,Q+T,etc424
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0)N/mm2
Creep rupture strength
(10000h)
(Rp1,0)N/mm2
181556462
Q255 ARange of products
Product typeProductsDimensionProcessesDeliver Status
Plates/SheetsPlates/Sheets0.08-200mm(T)*W*LForging,hot rolling and cold rollingAnnealed,Solution and Aging,Q+T,ACID-WASHED,Shot Blasting
Steel BarRound Bar,Flat Bar,Square BarΦ8-1200mm*LForging,hot rolling and cold rolling,CastBlack,Rough Turning,Shot Blasting,
Coil/StripSteel Coil/Steel Strip0.03-16.0x1200mmCold-Rolled&Hot-RolledAnnealed,Solution and Aging,Q+T,ACID-WASHED,Shot Blasting
Pipes/TubesSeamless Pipes/Tubes,Welded Pipes/TubesOD:6-219mm x WT:0.5-20.0mmHot extrusion,Cold Drawn,WeldedAnnealed,Solution and Aging,Q+T,ACID-WASHED
Cross Reference Table(Equivalent Grade)
GradeStandardCountryApplication
Y1Cr18Ni9China
Improve the machinability, ablation resistance. Suitable for automatic lathe production of bolt and nut
1Cr18Ni9China
High strength after cold forming, but elongation than 1 cr17ni7 slightly worse. Used in architectural decoration parts
1Cr18Mn10Ni5Mo3NChina
Of urea with good corrosion resistance, can produce urea corrosion of the equipment.
1Cr17Ni7China
High strength after cold forming. Used in railway vehicle, conveyor belt, bolt and nut, etc
Y1Cr18Ni9SeChina
Improve the machinability, ablation resistance. Suitable for automatic lathe production of rivets, screws
0Cr18Ni9China
Seamless stainless steel tubes for boiler and heat exchanger
00Cr19Ni10China
Carbon content lower than 0Cr19ni9 steel, excellent intergranular corrosion resistance, is used for welding after the class is not processed parts
1Cr17Mn6Ni5NChina
Nickel steel grade, instead of number 1 cr17ni7 and magnetism after cold working, used in railway vehicle, etc
1Cr18Mn8Ni5NChina
Nickel steel, instead of 1cr18ni9
0Cr19Ni9NChina
Based on 0cr19ni9 plus N, strength increase and the plastic is not down. Reduce the thickness of the material. As a structure with strength components
0Cr19Ni10NbNChina
Based on zero cr19ni9 plus N and Nb, with better than 0 cr19ni9 properties and USES
00Cr18Ni10NChina
In 00cr19ni10 adding N, on the basis of the above grades also features, use the same as the 0 cr19ni9n, but better intergranular corrosion resistance
1Cr18Ni12China
Compared with 0 cr19ni9, processing low hardenability. Used for spinning processing, special drawing, cold heading
0Cr23Ni13China
Corrosion resistance and heat resistance are better than 0cr19ni9
0Cr25Ni20China
Oxidation resistance is better than 0cr23ni13. Mostly used as heat resistant steel
0Cr17Ni12Mo2China
Seamless stainless steel tubes for boiler and heat exchanger
1Cr18Ni12Mo2TiChina
Seamless stainless steel tubes for boiler and heat exchanger
0Cr18Ni12Mo2TiChina
Seamless stainless steel tubes for boiler and heat exchanger
A-29 1025China
General use carbon steel rod
1025China
These products have been used typically for use in fabrication of fittings, but usage is not limited to such applications. These products are not typically used for deep forming or cupping operations.

Relevant products

Q255 A Steel Stock

Steel gradeDimensionShapeUnitQuantityDelivery stateQuery
SkD-11 Round Bar StockΦ30-Φ350Round BarKgs3102Hot-Rolled+Annealed+blackEnquiry
17-4PH Coil Stock0.08*200mmCoil or StripKgs1623Cold-Rolled+AnnealedEnquiry
D2 Round barΦ25-Φ380mmRound BarKgs45325Hot-Rolled+Annealed+blackEnquiry
Cr8 flat bar12*355*LFlat or Square barKgs3965Forged+Annealed+blackEnquiry
17-4PH Round BarΦ5-300mm*LRound BarKgs46958Hot-Rolled+Annealed+blackEnquiry
17-4PH plate8-45*1200*3000mmPlate or SheetTons4.9Hot-Rolled+Annealed+blackEnquiry
Cr12MoV12-160(T)*310-610(W)*LPlate or SheetTons12.38Hot-Rolled+Annealed+blackEnquiry
1.260112-160(T)*310-610(W)*LPlate or SheetTons11.22Hot-Rolled+Annealed+blackEnquiry
IncoloyA-286 / GH 2132 StockΦ8-65mm*LRound BarKgs489Hot-Rolled+Annealed+blackEnquiry
Incoloy800 round barΦ115*1400Round BarKgs169Hot-Rolled+Annealed+blackEnquiry
17-7PH / 631 Coil & Strip, Sheet Stock0.3-3.0*10-180mmCoil or StripKgs1236.22Cold-Rolled+AnnealedEnquiry
X22CrMoV12-1 / 1.4923Φ17mmRound BarKgs300Hot-Rolled+Annealed+blackEnquiry
1.2083 Forged PlateT:105-185mm*W:510*LPlate or SheetTons26Forged+QTEnquiry
X22CrMoV12-1 / 1.4923Φ30mmRound BarKgs300Hot-Rolled+Annealed+blackEnquiry
1.4882 strip/sheet/plate stock3.5x200x1000-2000mmCoil or StripKgs200Cold-Rolled+AnnealedEnquiry
A387 F5 & Grade 5 sheet Coil strip0.5mmx200mmxCCoil or StripTons3Cold-Rolled+AnnealedEnquiry
A387 F5 & Grade 5 Hot Coil stockSelectTons3Hot-Rolled+Annealed+blackEnquiry
T45Cr5Si3 Round BarDia.40mmRound BarKgs500Hot-Rolled+Annealed+blackEnquiry
UNS K30960(VIM+ESR) Bright Round BarDia.22mmRound BarKgs50Hot-Rolled+Annealed+blackEnquiry
SA-437 Grade B4B/SUS 616 /422 Forged BarDia.160xLRound BarKgs2120Forged+QTEnquiry

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