12CrMo A30122 - GB 6479-2000

Grade	12CrMo
China ISC	A30122
Corresponding Standard	GB 6479-2000 Seamless Steel Tubes for High-Pressure Chemical Fertilizer Equipments
Classification	Alloy Steel

12CrMo Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni ^①	Cu ^①	Mo
Minimum Value	0.08	0.17	0.4	-	-	0.4	-	-	0.4
Maximum Value	0.15	0.37	0.7	0.03	0.03	0.7	0.3	0.2	0.55

12CrMo Mechanical Properties

Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
Normalizing + tempering	410~560	≥205	≥21	KU2 ≥55

• When the final rolling temperature of hot-rolled pipes meets the normalizing temperature, normalizing can be used as a substitute.
• Steel pipes with an outer diameter d≥57mm and a wall thickness T≥14mm shall undergo U-notch impact tests as standard specimens. The evaluation of impact test results shall be in accordance with the provisions of GB/T 17505.
• Except for 12Cr2Mo, for other grades, when the wall thickness T is greater than 16 to 40mm, the yield point is allowed to decrease by 10MPa.

* Normalizing + tempering NT: Normalizing at 900°C to 930°C, tempering at 670°C to 720° C. Holding time: more than 2 hours for periodic furnaces and more than 1 hour for continuous furnaces.

1 Approximate Comparison Table Structural Alloy Steel

China		United States	Germany		France	Russia	Sweden	United Kingdom
GB	ISC	ASTM/AISI	DIN EN/DIN	W-Nr.	NF EN/NF	GOST	SS₁₄	BS EN/BS
12CrMo 12CrMoV	A30122 A31122	4119	13CrMo44	1.7335	12CD4	12ХМ 12ХМФ	2216	1501-620Cr27

2 Approximate Comparison Table Structural Alloy Steel

China	Japan	United States	International Organization for Standardization	Germany	France	European Standard		Russia	Sweden	United Kingdom
GB	JIS	ASTM	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade	GOST	SS	BS EN/BS
12CrMo	SFVAF12	A387Gr.12 Gr.P12	F32 P32	13CrMo4-4	15CD2.05 15CD4-05 15CD4-5	13CrMo4-5	1.7335	12KHM 15KHM	2216	620 620-440 620Gr.27

3 Approximate Comparison Table Structural Alloy Steel

China	Japan	United States	International Organization for Standardization	Germany	France	European Standard		Russia	Sweden	United Kingdom
GB	JIS	ASTM	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade	GOST	SS	BS EN/BS
12CrMo	SCMV4	A387Gr.22 Gr.P22	F34 P34 TS34	10CrMo9-10	10CD9-10 12CD9-10	10CrMo9-10	1.7380	10KH2M	2218	622 622Gr.31

4 Approximate Comparison Table Structural Alloy Steel

China	United States
GB	ASTM/AISI
12CrMo	A335 Grade P11 A335 Grade P12

12CrMo Corresponding Standards(Same grade name, different standards)

1	GB /T 3077-1999
	12CrMo A30122
2	GB /T 17107-1997
	12CrMo
3	GB 6479-2013
	12CrMo A30122
4	GB 6479-2000
	12CrMo A30122
5	GB /T 3077-2015
	12CrMo A30122
6	NB /T 47008-2017
	12CrMo
7	GB /T 37601-2019
	12CrMo

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!