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Applications of welded pipe piles and Testing and Materials

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Mechanical properties and allowable stress of chemical compositions of 15CrMo steel tubes

15CrMo Steel pipe material grade is 15CrMo, is a high-quality low-alloy structural steel, which contains CR, MO more, its high temperature, corrosion-resistant performance is very good, so 15crmo alloy seamless steel tube widely used in petroleum, petrochemical, high-pressure boilers and so on.

15CrMoG seamless alloy round steel pipe /15CrMo seamless steel pipe

Alloy seamless steel tube for its high temperature resistance, low temperature resistance, corrosion resistance has huge advantage over other seamless steel tubes, so the alloy tube are widely used in petroleum, chemical, electric power, boiler and other industries.

Product description

Standard	GB5310-95 GB9948-88 ASTMA335/A335M ASTMA213/213M DIN17175-79 JISG3467-88 JISG3458-88
Material	Cr5Mo.(P5.STFA25.T5) 15CrMo(P11,P12,STFA22) 13CrMo44 12Cr1MoV P22(10CrMo910) T91,P91,P9,T9 WB36
Steel grade:	T2/T5/T5b/T5c/T9/T11/T17/T21/T22/T23/T24/T36/T91/T92/T122/T911
Size:	Outer Diameter (OD): 1/8''-48'' or DN6-DN1200 or 10.3mm-1219mm Wall Thickness (WT): SCH10-SC160 or STD, XS, XS or 1.73mm-59.54mm Length: 1) Single Random Length: 16ft-22ft/4.8m-6.7m 2) Double Random Length: 22ft-35ft/6.7m-10.7m 3) Fixed Length: 16ft-41ft/4.8-12.5m 4) As per your requirements.
Technique:	Cold Drawn, Hot Rolled.
Applications:	petroleum chemical electric power high-pressure resistant high temperature resistant low temperature resistant corrosion resisting of boiler industry, etc.

The 15CrMo-series Pearlite-heat-resisting steels have high thermal strength (Δb≥440mpa) and antioxidation at high temperature, and have certain capability of resisting hydrogen corrosion. Because of the high content of CR, C and other alloying elements in steel, the hardening tendency of steel is obvious and the weldability is poor.

First, 15CrMo steel chemical composition

Grade	15CrMo steel chemical composition (mass fraction) ( % )
	C	Mn	Si	Cr	Mo	Ni	Nb + Ta	S	P
15CrMo	0.12 ~ 0.18	0.40 ~ 0.70	0.17 ~ 0.37	0.80 ~ 1.10	0.40 ~ 0.55	≤0.30	_	≤0.035	≤0.035

Second, 15CrMo mechanical properties of steel

Grade	Tensile strength MPa	Yield point MPa	Elongation ( % )
15CrMo steel pipe	440 ~ 640	235	twenty one

Third, 15CrMo steel allowable stress

15CrMo steel pipe GB9948 stress allowable standards
Steel number	Wall thickness ( mm)	In the following temperature ( deg.] C ) under the allowable stress ( Mpa)
Steel number	Wall thickness ( mm)	≤ 20	100	200	250	300	350	400	450	500	525	550
12CrMo	≤ 16	128	113	101	95	89	83	77	74	71	50	---
15CrMo	≤ 16	147	132	116	110	101	95	89	86	83	58	37

15CrMo steel pipe in the GB6479 standard allowable stress
Steel number	Wall thickness ( mm)	In the following temperature ( deg.] C ) under the allowable stress ( Mpa)
Steel number	Wall thickness ( mm)	≤ 20	100	200	300	400	450	500	525	550	575	600
12CrMo	≤ 16	128	113	101	89	77	74	71	50	-	-	-
12CrMo	17 ~ 40	122	110	98	86	74	71	68	50	-	-	-
15CrMo	≤ 16	147	132	116	101	89	86	83	58	37	-	-
15CrMo	17 ~ 40	141	126	110	95	86	83	79	58	37	-	-