Product Details

Product Description

STM4130
Corresponding domestic brand: 30CrMo.
Corresponding Japanese brand number: SCM430(SCM2)
Corresponding German brand: 34CrMo4(1.7220)

Material	20# ,45# ,Q345B,Q345D,25Mn,27sIMn,30CrMo, E355/st52, SAE1026...
Standard	DIN2391, EN10305, ASTM A519, GB/T 8713, GB/T3669...
Specification	OD ID
Specification	30-350mm 2-30mm
Straightness	1/1000 1/500
Surface	polished or coating
Delivery time	25-45days
Packing	Bundled with knitted plastic bag, wooden cases or according to customers' request.
application	Fluid and gas transport,decoration, construction,medical equipment, aviation, boiler heat-exchanger and other fields

Detailed Images

Steel Grade	C	Si	Mn	P	S	Cr	Ni	Cu	Al
20#	0.17-0.24	0.17-0.37	0.35-0.65	0.035	0035	0.250	0.250	/	/
45#	0.42-0.50	0.17-0.37	0.50-0.80	0.035	0.035	0.250	0.300	/	/
Q345B	≤0.2	≤0.5	1.00-1.60	0.030	0.030	0.300	0.250	0.08	/
Q345D	≤0.2	≤0.5	1.00-1.60	0.030	0.030	0.250	0.250	0.150	0.015
25Mn	0.22-0.29	0.17-0.37	0.70-1.00	0.035	0.035	/	/	/	/
27SiMn	0.24-0.32	1.10-1.40	1.10-1.40	0.035	0.035	0.300	0.300	/	/
E355	≤0.22	≤0.55	≤1.6	0.025	0.025	0.250	0.250	/	/
SAE1026	0.22-0.28	0.15-0.35	0.60-0.90	0.040	0.050	/	/	/	/

steel grade	Rm Mpa BK+S	ReH Mpa BK+S	Elongation BK+S	Rm Mpa(BK)	Elongation(BK)
20#	≥520	≥375	≥15	≥550	≥8
45#	≥600	≥520	≥10	≥640	≥5
16Mn	≥600	≥520	≥14	≥640	≥5
25Mn	≥600	≥510	≥15	≥640	≥5
27SiMn	≥760	≥610	≥10	≥800	≥5
ST45	≥520	≥375	≥15	≥550	≥5
E355	≥600	≥520	≥14	≥640	≥5
SAE1026	≥600	≥510	≥15	≥640	≥5

seamless pipe normal size

*5570**	*100114**	*150180**	*200225**
*6070**	*100115**	*155180**	*200230**
*6075**	*100120**	*160175**	*200245**
*6078**	*100125**	*160180**	*200250**
*6373**	*105125**	*160185**	*220250**
*6375**	*110125**	*160190**	*220270**
*6376**	*110130**	*160195**	*225250**
*6378**	*115130**	*165190**	*240273**
*6580**	*115135**	*165205**	*250290**
*7080**	*120140**	*170200**	*250300**
*7082**	*125140**	*180200**	*260300**
*7085**	*125145**	*180205**	*280323**
*7090**	*125150**	*180210**	*280355**
*7590**	*130150**	*180215**	*300350**
*8092**	*130155**	*180220**	*200213**
*8095**	*130160**	*185205**	*200216**
*80100**	*135160**	*185215**	*250266**
*85100**	*140160**	*185220**	other size customize
*90105**	*140165**	*190210**	other size customize

Delivery Condition

1. BK(+C)

the final heat treatment after cold forming, threfore small steel pipe plasticly, the plasticly degree does not guarantee

2. BKS(+SR)

have a stress relief after cold forming, heat treatment, steel pipe can be carried out within a certain limit in the appropriate processing again

3. NBK(+N)

after cold forming, eventually above phase transition point, in a protective atmosphere of annealing oxidation medium

4. BKW(+LC)

after final heat treatment, a tiny cold drawing deformation, continue again when machining steel pipe allowed inside certain limits cold deformation(bending, flaring)

5. GBK(+A)

after cold forming, annealing in non oxidizing medium protective gas

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