• Model NO.：EYHT
• Thickness：0.1 - 200 mm
• Length：2-12m
• Delivery Condition：Bk, Bk+S, Gbk, Nbk
• Roughness：0.2-0.4 U
• Straightness：≤ 0.5,1000
• Transport Package：Export Standard Packing
• Specification：5 - 500 mm
• Trademark：Kingmetal
• Origin：China (Mainland)
• HS Code：7304399000
• Production Capacity：5000 Ton, Month

Standard & Material

Carbon Steel

ASTM A519 Standard

MT1010, MT1020, 1008, 1010, 1018, 1020, 1025, 1030, 1045, 1518

JIS G3445 Standard

STKM11A  STKM12A  STKM12B  STKM12C   STKM13A  STKM13B STKM13C   STKM14A  STKM14B  STKM14C  STKM15A  STKM15C STKM16A  STKM16C   STKM17A   STKM17C  STKM18A  STKM18B STKM18C   STKM19A  STKM19C  STKM20A

JIS G3473 Standard

STC370, STC440, STC510A, STC510, STC540, STC590A, STC590B

DIN 2391 Standard

St 35, St45, St52

EN 10297-1 Standard

E235, E275, E315, E355, E470

EN 10305-1 Standard

E215, E235, E355

EN 10305-4 Standard

E215, E235, E355

BS 6323-3 Standard

HFS 3, HFS 4, HFS 5, HFS 8

NF A49-311

TU 37-b, TU 52-b, TU 56-b, TU XC35

Alloy Steel

ASTM A519 Standard

1345, 3140, 4130, 4135, 4140, 4150, 4320, 4340, 5120, 5130

JIS G3429 Standard

STH11, 12 STH21, 122 STH31

JIS G3441 Standard

SCR420TK, SCM415TK, SCM418TK, SCM420TK, SCM430TK, SCM440TK

DesignationSymbolDescriptionCold finished (hard)BKTubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation.Cold finished (soft)BKWThe final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding).Cold finished and stress-relievedBKSHeat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree.AnnealedGBKThe last cold forming process is followed by annealing in a controlled atmosphere.NormalizedNBKThe last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.Delivery ConditionCold Finished (Hard) (BK)Cold Drawn and Stress-Relieved (BK+S)Hardness HBParametersT.S. Rm N/mm2Elongation A5%T.S. Rm N/mm2Y.S. ReH N/mm2Elongation A5%20# (A106)≥550≥8≥520≥470≥1217545# (CK45)≥650≥5≥600≥520≥1220716Mn (ST52,E355)≥640≥5≥600≥520≥1519025Mn≥640≥5≥600≥510≥1519527SiMn≥840≥5≥800≥720≥10230

Steel Grade

Chemical Composition (%)

C

Si

Mn

P

S

Cr

≤

St45

0.17-0.24

0.17-0.37

0.35-0.65

0.035

0.035

0.250

ST52(E355)

≤0.22

≤0.55

≤1.6

0.025

0.025

0.25

SAE1026

0.22-0.28

0.15-0.35

0.60-0.90

0.040

0.050

/

27SiMn

0.24-0.32

1.10-1.40

1.10-1.40

0.035

0.035

0.300

20#

0.17-0.24

0.17-0.37

0.35-0.65

0.035

0.035

0.250