Standard:: ASTM, bs, DIN, GB, JIS, ASTM A179-1990, BS 6323, DIN 1629/3, DIN EN 10216-1-2004, DIN 1630, DIN 2391, DIN 17175, DIN EN 10305, DIN 2448, GB/T 8163-1999, GB/T 8162-1999, GB/T 3639-2000, JIS G3445-2006

Grade:: 10#, 20#, 45#, 16mn, ST37, ST52, ST45, ST35.8, St37-2, ST35.4, St52.4, St45-4, ST35, ST37.4, ST54, 10#-45#, 16mn, ST35-ST52

Surface Treatment:: annealed galvanized, or black phosphated st37.4 phosphated tube nbk

Tolerance:: ±5%

Processing Service:: Cutting

Name:: mild steel mechanical

Standard::: DIN 2391, EN10305-1, EN10305-4, BS 6323, ISO 8535

STEEL GRADE::: ST30Si, ST30Al, ST35, ST37, ST37.4, ST45, ST52, ST52.4, etc

Delivery condition::: BK, GBK, BKW, BKS or NBK for st37.4 phosphated tube nbk

Certificate::: ISO 9001 TS16949

Technique:: Cold Drawn, Cold Drawn

Secondary Or Not:: Non-secondary

Certification:: TS16949 ISO9001 for st37.4 phosphated tube nbk

Type:: Seamless Steel Pipe

Supply Ability

Supply Ability:: 1000 Ton/Tons per Month mild steel mechanical

Packaging & Delivery

mild steel mechanical properties seamless steel tube

Product Description

Standard: DIN 2391, EN10305-1, EN10305-4, BS 6323, BS3602, SAE J524

NBK/ +N (Normalized) condition

Our manufacture size

Outer Diameter:(1/16" )1.6mm to (2" ) 50.8mm

Wall thicnkess: (0.012" )0.3mm) to (0.394" ) 10mm

STEEL GRADE: ST35, ST37, ST37.4, ST45, ST52, ST52.4, etc

Product Standards

Chemical and Mechanical performance:

Table 1- Chemical composition
Steel Grade	C%	Si%	Mn%	P%	S%	AL%
St30Al or E215	≤0.10	≤0.05	≤0.7	≤0.025	≤0.025	≥0.025
St35 or E235	≤0.17	≤0.35	0.4-1.2	≤0.025	≤0.025
St45 or E255	≤0.21	≤0.35	0.4-1.1	≤0.025	≤0.025
St52 or E355	≤0.22	≤0.55	≤1.6	≤0.025	≤0.025

	Table 2 - Mechanical properties at room temperature
Delivery condition	BK		BKW		GBK		NBK (N)
steel Grade	Rm Mpa (Min)	A %(Min)	Rm Mpa(Min)	A %(Min)	Rm Mpa(Min)	A %(Min)	Rm Mpa(Min)	ReH Mpa(Min)	A %(Min)
St30Al or E215	430	8	380	12	280	30	290 to 430	215	30
St35 or E235	480	6	420	10	315	25	340 to 480	235	25
St45 or E255	580	5	520	8	390	21	440 to 570	255	21
St52 or E355	640	4	580	7	450	22	490 to 630	355	22

Working Pressure

Application

Company Information

FAQ

Packaging & Shipping

DELIVERY CONDITIONS

The tubes can be produced in the following delivery conditions:

BK (+C) Cold finished/hard (cold finished as drawn).

No heat treatment after the last cold forming process.

BKW (+LC) Cold finished/soft (lightly cold worked)

After the last heat treatment there is a light finishing pass (cold drawing).

BKS (+SR) Cold finished/stress relieve annealed.

After the final cold forming process the tubes are stress relieve annealed.

GBK (+A) Annealed.

After the final cold forming process the tubes are annealed in a controlled atmosphere.

NBK (+N) Normalized. (Mainly focus on)

After the final cold forming process the tubes are annealed above the upper transformation point in a controlled atmosphere.

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